JSE
Journal of Systematics
and Evolution
doi: 10.1111/jse.12229
Research Article
A community-derived classification for extant lycophytes
and ferns
The Pteridophyte Phylogeny Group
Recommended citation: PPG I (2016). This project was organized by, Eric Schuettpelz1*,
Harald Schneider2*, Alan R. Smith3, Peter Hovenkamp4, Jefferson Prado5, Germinal Rouhan6,
Alexandre Salino7, Michael Sundue8, Thaıs Elias Almeida9, Barbara Parris10, Emily B. Sessa11, Ashley R. Field12,
Luıs de Gasper13, Carl J. Rothfels14, Michael D. Windham15, Marcus Lehnert16, Benjamin Dauphin17,
Andre
Atsushi Ebihara18, Samuli Lehtonen19, Pedro Bond Schwartsburd20, Jordan Metzgar21, Li-Bing Zhang22,
Li-Yaung Kuo23, Patrick J. Brownsey24, Masahiro Kato18, Marcelo Daniel Arana25; with additional
contributions from (in alphabetical order): Francine C. Assis7, Michael S. Barker26, David S. Barrington8,
Ho-Ming Chang27, Yi-Han Chang28, Yi-Shan Chao29, Cheng-Wei Chen30, De-Kui Chen31, Wen-Liang Chiou32,
Vinıcius Antonio de Oliveira Dittrich33, Yi-Fan Duan34, Jean-Yves Dubuisson35, Donald R. Farrar36, Susan Fawcett8,
es-Neto7, Jason R. Grant17, Amanda L. Grusz38,
Jose Marıa Gabriel y Galan37, Luiz Armando de Ara
ujo Go
Christopher Haufler39, Warren Hauk40, Hai He31, Sabine Hennequin35, Regina Yoshie Hirai5, Layne Huiet15,
n44, Chun-Xiang Li45, Fay-Wei Li15,
Michael Kessler41, Petra Korall42, Paulo H. Labiak43, Anders Larsson42, Blanca Leo
46
47
48
49
rez , Hong-Mei Liu , Ngan Thi Lu , Esteban I. Meza-Torres , Xin-Yuan Miao45, Robbin Moran50,
Melanie Link-Pe
Claudine Massi Mynssen51, Nathalie Nagalingum52, Benjamin Øllgaard53, Alison M. Paul54, Jovani B. de S. Pereira55,
nica Ponce56, Tom A. Ranker57, Christian Schulz55, Wataru Shinohara58, Alexander Shmakov59,
Leon R. Perrie24, Mo
1
Erin M. Sigel , Filipe Soares de Souza Lana da Silva Sylvestre7, Weston Testo8, Luz Amparo Triana-Moreno61,
Chie Tsutsumi18, Hanna Tuomisto19, Ivan A. Valdespino62, Alejandra Vasco63, Raquel Stauffer Viveros7,
Alan Weakley64, Ran Wei65, Stina Weststrand42, Paul G. Wolf66, George Yatskievych44, Xiao-Gang Xu34,
Yue-Hong Yan67, Liang Zhang68, Xian-Chun Zhang65, and Xin-Mao Zhou22
1
Department of Botany, National Museum of Natural History, Smithsonian Institution
Institute of Ecology and Evolution, School of Life Sciences, Sun Yat-Sen University & Department of Life Sciences, Natural History Museum,
London
3
University Herbarium, University of California, Berkeley
4
Research & Education, Naturalis Biodiversity Center, Leiden
5
Herbario SP, Instituto de Bot^
anica, S~ao Paulo
6
Institut de Syst
ematique, Evolution, Biodiversit
e, Sorbonne Universit
es, Mus
eum National d’Histoire Naturelle, Herbier National, Paris
7
Departamento de Bot^anica, Universidade Federal de Minas Gerais
8
Pringle Herbarium, Department of Plant Biology, University of Vermont
9
Herbario HSTM, Universidade Federal do Oeste do Par
a
10
Fern Research Foundation, Kerikeri
11
Department of Biology, University of Florida
12
Queensland Herbarium; Department of Science and Innovation and Australian Tropical Herbarium, James Cook University
13
Departamento de Ci^
encias Naturais, Universidade Regional de Blumenau
14
University Herbarium and Department of Integrative Biology, University of California, Berkeley
15
Department of Biology, Duke University
16
Nees-Institut f€
ur Biodiversit€
at der Pflanzen, Rheinische Friedrich-Wilhelms-Universit€at Bonn
17
Laboratoire de Botanique Evolutive,
Institut de Biologie, Universit
e de Neuch^atel
18
Department of Botany, National Museum of Nature and Science, Tokyo
19
Department of Biology, University of Turku
20
Departamento de Biologia Vegetal, Universidade Federal de ViSc osa
21
Museum of the North, University of Alaska Fairbanks
22
Missouri Botanical Garden
23
Institute of Ecology and Evolutionary Biology, National Taiwan University
24
Collections, Research, and Learning, Museum of New Zealand Te Papa Tongarewa
25
Departamento de Ciencias Naturales, Universidad Nacional de Rıo Cuarto
2
XXX 2016 | Volume 9999 | Issue 9999 | 1–40
© 2016 Institute of Botany, Chinese Academy of Sciences
2
The Pteridophyte Phylogeny Group
26
Department of Ecology and Evolutionary Biology, University of Arizona
Division of Botany, Taiwan Endemic Species Research Institute
28
Hengchun Research Center, Taiwan Forestry Research Institute
29
Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University
30
Division of Botanical Garden, Taiwan Forestry Research Institute
31
College of Life Sciences, Chongqing Normal University
32
Herbarium, Taiwan Forestry Research Institute
33
Departamento de Bot^
anica, Universidade Federal de Juiz de Fora
34
Department of Botany, College of Biology and the Environment, Nanjing Forestry University
35
Institut de Syst
ematique, Evolution, Biodiversit
e, Sorbonne Universit
es, Universit
e Pierre et Marie Curie, Paris
36
Department of Ecology, Evolution and Organismal Biology, Iowa State University
37
Departamento de Biologıa Vegetal I, Universidad Complutense de Madrid
38
Department of Biology, University of Minnesota Duluth
39
Department of Ecology and Evolutionary Biology, University of Kansas
40
Department of Biology, Denison University
41
Department of Systematic and Evolutionary Botany, University of Zurich
42
Department of Organismal Biology, Evolutionary Biology Centre, Uppsala University
43
Departamento de Bot^
anica, Universidade Federal do Paran
a
44
Plant Resources Center, University of Texas at Austin
45
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences
46
Department of Botany and Plant Pathology, Oregon State University
47
Shenzhen Key Laboratory of Southern Subtropical Plant Diversity, Fairylake Botanical Garden, Chinese Academy of Sciences
48
Department of Botany, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hanoi
49
Instituto de Botanica del Nordeste, Universidad Nacional del Nordeste, Consejo Nacional de Investigaciones Cientıficas y T
ecnicas
50
New York Botanical Garden
51
Diretoria de Pesquisa, Instituto de Pesquisa Jardim Bot^
anico do Rio de Janeiro
52
National Herbarium of New South Wales, Royal Botanic Gardens and Domain Trust
53
Section for Ecoinformatics and Biodiversity, Aarhus University
54
Department of Life Sciences, Natural History Museum, London
55
Department of Evolution and Biodiversity of Plants, Ruhr-Universit€
at Bochum
56
Instituto de Botanica Darwinion, Consejo Nacional de Investigaciones Cientıficas y T
ecnicas, Buenos Aires
57
Department of Botany, University of Hawaii at Manoa
58
Faculty of Education, Kagawa University
59
South-Siberian Botanical Garden, Altai State University
60
Departamento de Bot^anica, Universidade Federal do Rio de Janeiro
61
Departamento de Ciencias Biol
ogicas, Universidad de Caldas
62
Departamento de Botanica, Universidad de Panam
a
63
Instituto de Biologıa, Universidad Nacional Aut
onoma de M
exico
64
UNC Herbarium, North Carolina Botanical Garden, University of North Carolina at Chapel Hill
65
Institute of Botany, Chinese Academy of Sciences
66
Department of Biology, Utah State University
67
Shanghai Chenshan Botanical Garden, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences
68
Kunming Institute of Botany, Chinese Academy of Sciences
*Authors for correspondence. E-mail: schuettpelze@si.edu and haralds@mail.sysu.edu.cn
Received 7 October 2016; Accepted 1 November 2016; Article first published online xx Month 2016
27
Abstract Phylogeny has long informed pteridophyte classification. As our ability to infer evolutionary trees has
improved, classifications aimed at recognizing natural groups have become increasingly predictive and stable. Here,
we provide a modern, comprehensive classification for lycophytes and ferns, down to the genus level, utilizing a
community-based approach. We use monophyly as the primary criterion for the recognition of taxa, but also aim to
preserve existing taxa and circumscriptions that are both widely accepted and consistent with our understanding of
pteridophyte phylogeny. In total, this classification treats an estimated 11 916 species in 337 genera, 51 families, 14
orders, and two classes. This classification is not intended as the final word on lycophyte and fern taxonomy, but
rather a summary statement of current hypotheses, derived from the best available data and shaped by those most
familiar with the plants in question. We hope that it will serve as a resource for those wanting references to the
recent literature on pteridophyte phylogeny and classification, a framework for guiding future investigations, and a
stimulus to further discourse.
Key words: classification, ferns, lycophytes, monophyly, phylogeny, pteridophytes.
J. Syst. Evol. 9999 (9999): 1–40, 2016
www.jse.ac.cn
PPG I
Free-sporing vascular plants comprise two distinct evolutionary lineages—lycophytes and ferns (e.g., Kenrick & Crane,
1997; Pryer et al., 2001)—that share a unique life cycle with
independent gametophyte and sporophyte phases (e.g.,
Haufler et al., 2016). Classifications of these plants—often
referred to collectively as pteridophytes despite their
phylogenetic separation—have long been grounded in
evolutionary principles and have reflected perceived evolutionary trends (e.g., Copeland, 1947; Pichi Sermolli, 1973,
1977b; Kramer & Green, 1990; Smith, 1995; Smith et al., 2006b;
Christenhusz & Chase, 2014). However, these classifications
were often conflicting, in large part due to a paucity of
information concerning pteridophyte relationships and a lack
of consensus regarding patterns of morphological evolution.
The increased availability of molecular data and advances in
phylogenetic methods have revolutionized our understanding
of lycophyte and fern relationships. Today, as a consensus
emerges concerning the evolutionary history of these
lineages, classifications aimed at recognizing their natural
groups are becoming increasingly “predictive” (Stuessy,
2009) and, we hope, stable.
The ordinal and familial scheme by Smith et al. (2006b) was
the first higher-level pteridophyte classification published in
the molecular era. Although this work focused exclusively on
ferns, these plants—also referred to as “monilophytes” in
some publications (e.g., Pryer et al., 2004; Smith et al., 2006b;
Schneider et al., 2009; here we simply use “ferns”)—account
for nearly 90% of extant pteridophyte diversity. Founded on
the principle of monophyly, while also recognizing the
importance of maintaining well-established names and
circumscriptions, the Smith et al. (2006b) classification
established a new standard in fern taxonomy. Over the past
decade, many important advances have been made in our
understanding of relationships, some of which are reflected in
subsequent higher-level schemes (e.g., Christenhusz et al.,
2011; Rothfels et al., 2012b). A recent scheme by Christenhusz
& Chase (2014) was also consistent with an understanding of
fern phylogeny but represented a considerable departure in
terms of stability and has not been widely adopted.
Here, we provide a modern, comprehensive classification
for lycophytes and ferns, following the main tenets of the
Smith et al. (2006b) work but utilizing a democratic
community-based approach. To accomplish this goal, we
have established the Pteridophyte Phylogeny Group (PPG),
based loosely on the model employed for flowering plant
classification (APG, 1998; APG II, 2003; APG III, 2009; APG IV,
2016). Below, we outline our general philosophy and
approach, summarize our outcomes, and present a consensus
classification for all pteridophytes, from the rank of class to
that of genus.
Philosophy
Biological classifications are fundamentally tools for communication about biodiversity (e.g., Stuessy, 2009). The stability of
names is thus of great importance, and it is critical to consider
existing classifications when determining taxa worthy of
recognition and the ranks at which to treat them. A focus on
natural groups is similarly important, as it results in classifications that reflect evolutionary history (Schmidt-Lebuhn,
www.jse.ac.cn
3
2011) and ultimately lead to greater stability. Although we
acknowledge the validity of some arguments presented in
favor of maintaining paraphyletic taxa (see, e.g., H€
orandl &
Stuessy, 2010), we ultimately reject this practice and aim to
recognize only monophyletic lineages at the genus level and
above. There are many reasons why monophyly might not be
expected at the species level. This is especially true when
polyploid speciation is rampant and, among pteridophytes, it
has been estimated that nearly a third of all speciation events
are correlated with an increase in ploidy (Wagner & Wagner,
1980; Wood et al., 2009). We acknowledge the difficulties
inherent in translating evolutionary tree structures into
hierarchical rank-based classifications. However, because
such classifications have been implemented for centuries and
continue to be used extensively, we do not subscribe to the
alternative approach (disruptive, from the standpoint of
stability) recommended in the PhyloCode (Cantino & de
Queiroz, 2000). Due to the many challenges of incorporating
fossil taxa, this first installment of the PPG classification focuses
exclusively on extant lycophytes and ferns. Although some
fossils could easily be accommodated, the phylogenetic
affinities of most extinct plants are rather unclear. Many fossil
taxa represent distinct evolutionary lineages and their inclusion
in the PPG I classification would not only require revised
circumscriptions, but almost certainly the recognition of new
families, orders, and even classes.
In general, the PPG I classification seeks to preserve existing
taxa and circumscriptions that are widely accepted and
consistent with our understanding of lycophyte and fern
phylogeny. Although monophyly is our primary criterion for
the recognition of taxa (Backlund & Bremer, 1998), we adopt a
conservative approach that minimizes name changes in cases
where data are insufficient to circumscribe what we judge to
be stable monophyletic groups; this is with the understanding
that some currently accepted taxa may ultimately be revealed
to be non-monophyletic. In making decisions, we secondarily
weigh morphological diagnosability and homogeneity, and
hierarchical equivalency in terms of both age and diversity.
This classification is not meant to be the final word on
pteridophyte taxonomy, but rather a summary statement of
current hypotheses, derived from the best available data and
shaped by those most familiar with the plants in question. We
hope that it will serve as a resource for those wanting
references to recent literature on lycophyte and fern
phylogeny, a framework for guiding future investigations,
and a stimulus to further discourse. Although we welcome its
use by systematists, other scientists, herbaria, governmental
agencies, and others with a professional or non-professional
interest in plants, we recognize that a single system may not
serve all users and we are strongly opposed to this
classification, or any other classification, being imposed on
investigators, authors, editors, or reviewers. Disagreements
exist even among the contributors to this PPG I classification,
as noted below.
Approach
Establishment of the Pteridophyte Phylogeny Group (PPG)
began through promotion of the concept at international
conferences (including the 2015 Next Generation Pteridology
J. Syst. Evol. 9999 (9999): 1–40, 2016
4
The Pteridophyte Phylogeny Group
conference) and posts to society websites and e-mail lists,
including those of the American Fern Society (AFS) and the
International Association of Pteridologists (IAP). After a series
of informal discussions among the early respondents, an
electronic mailing list was established to enhance community
engagement and facilitate discussion. As the project gained
momentum, the community of collaborators expanded;
currently, the PPG is a global community of 94 pteridologists.
The classification presented herein is community-derived,
and the taxa recognized have the support of a majority (or a
plurality, in select instances) of the contributors. Decisions
were made using an inclusive, transparent, and straightforward approach that typically involved: (1) an initial conversation among members of a focused subcommittee consisting
of experts willing to contribute to the discussion; (2)
formulation of a draft proposal by the subcommittee; (3)
discussion of the draft proposal among all members of the
PPG community; (4) production of a revised proposal; and (5)
approval of the revised proposal through a formal vote or
simple acclamation.
For the highest-level taxa, a dialogue was initiated across
the whole of the PPG. After discussion of the advantages and
disadvantages of various options, one system (recognizing
classes and subclasses) emerged as the clear preference. A
vote was taken to ensure there was majority support. A similar
approach was used later to reach decisions concerning the
informal names to be applied to major clades.
To determine the orders, suborders, and families to be
recognized, an organizing subcommittee developed the initial
proposal. This was then shared electronically with all
contributors, along with a survey developed to gauge
acceptability and highlight areas needing further discussion.
With the results of this survey in hand, discussion proceeded
among all contributors. Following this dialogue, a revised poll
was constructed that presented alternatives in areas of
disagreement. All orders, suborders, and families recognized
herein ultimately received majority support, ranging from just
over 50% to unanimous approval.
After settling on a list of higher-level taxa to be recognized,
members of the PPG were asked (via an online survey)
whether they felt that the generic classification within
particular clades was in need of attention. In cases where a
unanimous consensus existed, the organizers implemented
the prevailing generic classification. If a clade were identified
as needing attention, a subcommittee was established,
consisting of contributors with experience in the particular
lineage.
Clade-focused subcommittees, under the leadership of
subcommittee heads (selected by subcommittee members),
discussed alternative generic classifications, reached a
consensus, and presented a proposal for approval by the
whole of the PPG. Any concerns were mediated via open
dialogue through the PPG e-mail list.
After arriving at a system of classes, subclasses, orders,
suborders, families, and genera to be recognized, subcommittee heads (with the assistance of other contributors) were
then tasked with compiling the following pertinent information for each included taxon: (1) the author of the name and
the protologue reference; (2) for genera, the type species and
basionym, along with the lectotypification reference (where
applicable); (3) a brief statement outlining the circumscription
J. Syst. Evol. 9999 (9999): 1–40, 2016
of the taxon; (4) a brief statement concerning its monophyly;
(5) a list of any included taxa (i.e., synonyms); (6) the number
of species attributed to the taxon; and (7) any additional
comments.
The classification presented herein reflects our current
understanding of lycophyte and fern phylogeny (see references below). But, ultimately, circumscriptions adopted
herein are all subject to reconsideration, given new evidence.
Future research will enable greater insight into pteridophyte
evolution and our classification will need to accommodate
more robust hypotheses. To this end, we envision formal
updates to the PPG I classification, with interim improvements
tracked on a PPG website. Such adjustments (most likely a
series of small incremental changes) will be carried out via the
process outlined above, with initial proposals generated by
smaller groups that are subsequently discussed and approved
or rejected by the broader PPG.
Outcomes
We recognize two pteridophyte classes: Lycopodiopsida
(lycophytes) and Polypodiopsida (ferns). These are distinct
lineages within the tracheophyte tree of life, with ferns
resolved as more closely related to seed plants than to
lycophytes (Fig. 1; Kenrick & Crane, 1997; Pryer et al., 2001).
Within Lycopodiopsida, we further recognize three orders
(Lycopodiales, Isoëtales, and Selaginellales). Order Lycopodiales includes one family and 16 genera, whereas orders
Isoëtales and Selaginellales each contain a single monogeneric
family.
Within Polypodiopsida, we recognize four subclasses:
Equisetidae (horsetails); Ophioglossidae; Marattiidae; and
Polypodiidae (leptosporangiates). Extant Equisetidae includes
a single order, a single small family, and a single genus
(Equisetum L.). Subclass Ophioglossidae encompasses two
orders, each with a single family, and a total of 12 genera.
Marattiidae includes just one order, one family, and six
genera.
Subclass Polypodiidae comprises the vast majority of extant
fern diversity (Fig. 1). Here, we recognize seven orders
(Osmundales, Hymenophyllales, Gleicheniales, Schizaeales,
Salviniales, Cyatheales, and Polypodiales), with the Polypodiales
subsequently divided into six suborders (Saccolomatineae,
Lindsaeineae, Pteridineae, Dennstaedtiineae, Aspleniineae, and
Polypodiineae). Within Osmundales, we recognize a single small
family with six genera. Order Hymenophyllales also includes just
one family, but it is considerably larger and encompasses nine
genera. Gleicheniales and Schizaeales each constitute three
relatively small families, with ten and four total genera,
respectively. The order Salviniales comprises two families and
five genera, and the order Cyatheales encompasses seven small
families, with a total of ten genera, plus the larger Cyatheaceae
with three genera.
Within the Polypodiales, suborder Saccolomatineae includes a single small monogeneric family (Saccolomataceae).
Suborder Lindsaeineae comprises two monogeneric families
plus the larger Lindsaeaceae with seven genera. We recognize
a single large family within Pteridineae, which includes 52
genera. Suborder Dennstaedtiineae also includes a single
family, with ten genera. The remaining two suborders,
www.jse.ac.cn
PPG I
5
Fig. 1. Summary tracheophyte phylogeny, depicting relationships among lycophyte and fern families recognized in this PPG I
classification. Composite topology is derived from the results of numerous phylogenetic studies (e.g., Pryer et al., 2001, 2004; Korall et al.,
2006; Schuettpelz & Pryer, 2007; Rai & Graham, 2010; Lehtonen, 2011; Rothfels et al., 2012a, 2015; Knie et al., 2015; Zhang & Zhang, 2015).
Most nodes have received consistently strong support; dotted lines indicate areas of considerable uncertainty. For each family, we note
the total number of genera recognized in PPG I and the sum of species estimates for these genera (terminal clade height is roughly
proportional to diversity for families with more than 100 species). Where applicable, informal clade names are provided in parentheses.
www.jse.ac.cn
J. Syst. Evol. 9999 (9999): 1–40, 2016
6
The Pteridophyte Phylogeny Group
Aspleniineae (eupolypods II) and Polypodiineae (eupolypods
I), are exceedingly diverse, together accounting for well over
half of extant pteridophyte diversity. Suborder Aspleniineae
encompasses four large families, with a total of 59 genera, and
seven smaller families, with 14 genera and fewer than 100
species. Finally, suborder Polypodiineae comprises three large
families, with a total of 98 genera, and six small families, with
ten genera.
In all, this PPG I classification treats an estimated 11 916
species in 337 genera, 51 families, 14 orders, and 2 classes.
In some cases, additional divisions are made to recognize
subclasses and suborders (as noted above), as well as
subfamilies (see classification below). Classes, subclasses,
orders, suborders, and families, are organized phylogenetically, generally with increasing species diversity (Fig. 1).
Within each family, subfamilies, if recognized, are organized by increasing species diversity; genera are then
organized alphabetically within each family or subfamily, as
applicable.
Discussion
As noted above, the PPG I classification presented here
reflects our current, collective understanding of lycophyte
and fern phylogeny. It takes into consideration all studies
examining the relationships of these plants published through
mid-2016. The PPG I classification also aims to maintain, where
possible, continuity in the naming and circumscription of
families and genera as recognized by most pteridologists prior
to the molecular revolution (e.g., Kramer & Green, 1990). In
this respect, this study continues the approach employed in
most recent classifications (e.g., Smith et al., 2006b;
Christenhusz et al., 2011; Rothfels et al., 2012b) but differs
from classifications that favored a reduction in the number of
taxa recognized (e.g., Christenhusz & Chase, 2014).
At the highest taxonomic ranks, the PPG I classification is
wholly compatible with a scheme recently proposed for all of
life. Ruggiero et al. (2015) treated lycophytes and ferns as
distinct subphyla (Lycopodiophytina and Polypodiophytina),
each with a single class (Lycopodiopsida and Polypodiopsida).
The present classification recognizes the two classes but does
not make recommendations above this rank. Further, the PPG
I classification agrees with Ruggiero et al. (2015) in recognizing
four subclasses within ferns (Equisetidae, Ophioglossidae,
Marattiidae, and Polypodiidae). This approach differs from
that of Smith et al. (2006b), in which the four major lineages of
ferns were recognized as classes, as well as from that of Chase
& Reveal (2009), where embryophytes were treated collectively as a single class, but is consistent with the scheme used
in the Tree of Life Web Project (Pryer et al., 2009). Although
two of these higher-level classifications (Smith et al., 2006b;
Chase & Reveal, 2009) do not provide a formal scientific name
for ferns, they do both clearly unite the four fern lineages that
we recognize as subclasses (Equisetidae, Ophioglossidae,
Marattiidae, and Polypodiidae). We do not consider our
decision to include them together in a single class to be
controversial, as the corresponding clade (i.e., ferns) has been
resolved consistently in analyses of molecular data (e.g., Pryer
et al., 2001, 2004; Qiu et al., 2007; Schneider et al., 2009; Ruhfel
et al., 2014; Wickett et al., 2014; Rothfels et al., 2015) and even
J. Syst. Evol. 9999 (9999): 1–40, 2016
most analyses of morphological data (Kenrick & Crane, 1997;
Schneider et al., 2009).
Pteridophyte classification has been exceedingly stable at
the ordinal level over the past decade. Smith et al. (2006b)
recognized 11 orders within ferns, one for each of four major
eusporangiate lineages and seven within leptosporangiates.
Christenhusz et al. (2011) and Christenhusz & Chase (2014)
adopted these same 11 fern orders plus three orders for
lycophytes (not treated by Smith et al., 2006b). At the ordinal
level, the PPG I classification does not differ at all from the
earlier classifications, but we do introduce a new informal
name for one large order. Polypodiales, which accounts for
more than 80% of fern diversity, has previously been referred
to as “polypods” (Schneider et al., 2004b; Smith et al., 2006b).
However, “polypods” has also been used to refer to the
members of the family Polypodiaceae that do not belong to
the distinct (and diverse) “grammitid” clade (Smith, 1995;
Sundue et al., 2014). Here, we aim to avoid confusion by using
a more descriptive informal name for the more inclusive clade
(i.e., that equivalent to Polypodiales). We refer to this clade as
“cathetogyrates” (a term first used by Bernhardi, 1806), in
reference to the unique sporangium—with a vertical ring of
annular cells—that characterizes this lineage. Within the
Polypodiales, we recognize six suborders, providing formal
names for “eupolypods I”, “eupolypods II”, and other clades.
As this rank has not typically been utilized within ferns, five of
these suborders are new.
Outside of the Polypodiales, the 25 families recognized in
this PPG I classification are identical to those in Smith et al.
(2006b, for ferns) and Christenhusz et al. (2011). Within the
Polypodiales, we recognize 26 families, and there are some
stark differences relative to Smith et al. (2006b) and
Christenhusz et al. (2011). The Lindsaeaceae, Woodsiaceae,
Dryopteridaceae, and Lomariopsidaceae sensu Smith et al.
(2006b) have all been found to be paraphyletic in more recent
phylogenetic analyses and are here divided into three, seven,
three, and two families, respectively. The present PPG I
classification additionally recognizes subfamilies within some
of the larger families of lycophytes and ferns, especially those
with a history of subdivision. This has the advantage of
providing formal names for some clades (e.g., vittarioids and
grammitids) that were long recognized as distinct families but
were later subsumed into other families (within which they
appear to be nested).
Unlike recent comprehensive treatments of lycophytes and
ferns (e.g., Smith et al., 2006b; Christenhusz et al., 2011), the
PPG I classification extends to the genus level. We formally
recognize 337 pteridophyte genera, representing a 50%
increase over the 223 genera included in the pre-molecular
system of Kramer & Green (1990). Although this difference is
dramatic, the constituent changes have, in fact, accumulated
incrementally over the past quarter-century. When existing
generic concepts are found to be in conflict with the results of
molecular phylogenetic analyses, there are, using monophyly
as a criterion, two paths to resolution: disintegration (i.e., the
“splitting” of a non-monophyletic genus into multiple
monophyletic genera to maintain a nested genus); or
integration (i.e., the “lumping” of a nested genus with the
genus it renders non-monophyletic). Both approaches have an
impact on stability, as the former results in new descriptions
(or reinstatements) and the latter in synonymizations.
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PPG I
Looking again at the marked increase in the number of
pteridophyte genera, it is clear that disintegration has typically
been favored and some lineages have experienced greater
change than others. Instead of recognizing just four genera
within the Lycopodiaceae (sensu Øllgaard, 1990), the PPG I
classification takes the now-common approach of subdividing
the family into 16 genera (Holub, 1964, 1975, 1983, 1985, 1991;
Wagner & Beitel, 1992; Haines, 2003; Øllgaard, 2012a, 2012b,
2015; Field & Bostock, 2013; Øllgaard & Windisch, 2014; Field
et al., 2016). Likewise, we mostly follow Almeida et al. (2016) in
our treatment of 30 genera in Thelypteridaceae (versus five in
Smith, 1990) and we also incorporate considerable subdivision
recently proposed for the Hymenophyllaceae (sensu Ebihara
et al., 2006), grammitids (sensu Sundue et al., 2014), and
Blechnaceae (sensu Gasper et al., 2016b). In the majority of
these studies, the authors were largely able to re-establish
preexisting (narrower) concepts that were both introduced
and discarded prior to the molecular revolution.
Of course, more inclusive generic concepts have been
favored in some cases. We continue to recognize a broad
Asplenium L. (segregating only Hymenasplenium Hayata, sensu
Schneider et al., 2004a). And, despite recent subdivisions, the
present PPG I classification ultimately recognizes an inclusive
Davallia Sm. (sensu Tsutsumi et al., 2016) and Woodsia R.Br.
(sensu Shao et al., 2015). Furthermore, the genus Dryopteris
Adans. is greatly expanded here, relative to its definition at the
end of the 20th century (Kramer et al., 1990), to include
segregates such as Acrophorus C.Presl, Dryopsis Holttum &
P.J.Edwards, Nothoperanema (Tagawa) Ching, and Peranema
D.Don (Zhang & Zhang, 2012; Zhang et al., 2012). Notably,
resolution via integration, and the resulting recognition of
larger genera, appears to be much more common in flowering
plants (Humphreys & Linder, 2009).
The PPG I classification presented below does not provide
species lists; however, we do present estimates of species
number for each genus. Interestingly, our genus-based totals
(1338 lycophyte species and 10 578 fern species) are remarkably similar to the family-based sums provided by Christenhusz & Chase (2014; 1300 lycophytes and 10 535 ferns).
Classification
Class Lycopodiopsida Bartl., Ord. Nat. Pl.: 14, 19. 1830.
Circumscription sensu Ruggiero et al. (2015). Monophyletic
(Pryer et al., 2001; Kenrick & Crane, 1997; Rai & Graham, 2010;
Wickett et al., 2014). Three orders, three families, 18 genera,
and an estimated 1338 species.
7
Subfamily Lycopodielloideae W.H.Wagner & Beitel ex B.
Øllg., Nordic J. Bot. 33(2): 195. 2015. Circumscription sensu
Øllgaard (2015). Monophyletic (Field et al., 2016). Included
in Lycopodioideae in Field et al. (2016). Four genera and an
estimated 54 species.
Lateristachys Holub, Folia Geobot. Phytotax. 18: 440.
1983. Type: Lateristachys lateralis (R.Br.) Holub (
Lycopodium laterale R.Br.). Circumscription sensu
Holub (1983). Monophyletic (Field et al., 2016). Four
species.
Lycopodiella Holub, Preslia 36: 20, 22. 1964. Type:
Lycopodiella inundata (L.) Holub ( Lycopodium
inundatum L.). Circumscription sensu Øllgaard &
Windisch (2014). Monophyletic (Field et al., 2016). 15
species.
Palhinhaea Franco & Vasc., Bol. Soc. Brot., ser. 2, 41: 24.
1967. Type: Palhinhaea cernua (L.) Vasc. & Franco (
Lycopodium cernuum L.). Circumscription sensu Holub
(1985, 1991), Øllgaard (2012b), and Øllgaard & Windisch (2014). Monophyletic (Field et al., 2016). Palhinhaea Franco & Vasc. is proposed to be conserved
against Lepidotis P.Beauv. (Greuter & Troia, 2014). 25
species.
Pseudolycopodiella Holub, Folia Geobot. Phytotax. 18:
441. 1983. Type: Pseudolycopodiella caroliniana (L.)
Holub ( Lycopodium carolinianum L.). Circumscription sensu Holub (1983). Monophyletic (Field et al.,
2016). 10 species.
Subfamily Lycopodioideae W.H.Wagner & Beitel ex B.
Øllg., Nordic J. Bot. 33(2): 195. 2015. Circumscription sensu
Øllgaard (2015). Monophyletic (Field et al., 2016). Including
Lycopodielloideae in Field et al. (2016). Nine genera and an
estimated 58 species.
Austrolycopodium Holub, Folia Geobot. Phytotax. 26
(1): 90. 1991. Type: Austrolycopodium magellanicum (P.
Beauv.) Holub ( Lepidotis magellanica P.Beauv.).
Circumscription sensu Holub (1991). Monophyletic
(Field et al., 2016). Eight species.
Dendrolycopodium A.Haines, Fam. Huperziac. Lycopodiac. New England: 84. 2003. Type: Dendrolycopodium
obscurum (L.) A.Haines ( Lycopodium obscurum L.).
Circumscription sensu Haines (2003). Monophyletic
(Field et al., 2016). Four species.
A. Order Lycopodiales DC. ex Bercht. & J.Presl, Prir. Rostlin:
272. 1820. Circumscription equivalent to family Lycopo€m &
diaceae in this classification. Monophyletic (Wikstro
Kenrick, 1997, 2000, 2001; Ji et al., 2008; Field et al.,
2016). One family, 16 genera, and an estimated 388
species.
Diphasiastrum Holub, Preslia 47(2): 104. 1975. Type:
Diphasiastrum complanatum (L.) Holub ( Lycopodium complanatum L.). Circumscription sensu Holub
(1975, 1985). Monophyletic (Field et al., 2016). 20
species.
1. Family Lycopodiaceae P.Beauv. in Mirb., Hist. Nat. Veg. 4:
293. 1802. Circumscription sensu Øllgaard (2015). Mono€m & Kenrick, 1997, 2000, 2001; Ji et al.,
phyletic (Wikstro
2008; Field et al., 2016). Three subfamilies, 16 genera, and
an estimated 388 species.
Diphasium C.Presl ex Rothm., Repert. Spec. Nov. Regni
Veg. 54: 64. 1944. Type: Diphasium jussiaei (Desv.)
Rothm. ( Lycopodium jussiaei Desv.). Circumscription
sensu Holub (1985). Monophyletic (Field et al., 2016).
Five species.
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J. Syst. Evol. 9999 (9999): 1–40, 2016
8
The Pteridophyte Phylogeny Group
Lycopodiastrum Holub ex R.D.Dixit, J. Bombay Nat.
Hist. Soc. 77(3): 540. 1981. Type: Lycopodiastrum
casuarinoides (Spring) Holub ex R.D.Dixit ( Lycopodium casuarinoides Spring). Circumscription sensu
Holub (1983) and Zhang & Iwatsuki (2013). Monotypic
(Field et al., 2016).
Lycopodium L., Sp. Pl. 2: 1100. 1753. Lectotype
(designated by W.J.Rob., Bull. Torrey Bot. Club 41:
51. 1914): Lycopodium clavatum L. Circumscription
sensu Haines (2003). Monophyletic (Field et al., 2016).
15 species.
Pseudodiphasium Holub, Folia Geobot. Phytotax.
18: 440. 1983. Type: Pseudodiphasium volubile (G.
Forst.) Holub ( Lycopodium volubile G.Forst.).
Circumscription sensu Holub (1983). Monotypic
(Field et al., 2016).
Pseudolycopodium Holub, Folia Geobot. Phytotax. 18:
441. 1983. Type: Pseudolycopodium densum (Rothm.)
Holub ( Lepidotis densa Rothm.). Circumscription
sensu Holub (1983). Monotypic (Field et al., 2016).
Spinulum A.Haines, Fam. Huperziac. Lycopodiac.
New England: 85. 2003. Type: Spinulum annotinum
(L.) A.Haines ( Lycopodium annotinum L.). Circumscription sensu Haines (2003). Presumably monophyletic; only one species sampled to date (Field
et al., 2016). Three species.
Subfamily Huperzioideae W.H.Wagner & Beitel ex B.Øllg.,
Nordic J. Bot. 33(2): 195. 2015. Circumscription sensu
Øllgaard (2015) and Field et al. (2016). Monophyletic (Field
et al., 2016). Three genera and an estimated 276 species.
Huperzia Bernh., J. Bot. (Schrader) 1800(2): 126.
1801. Lectotype (designated by Rothm., Repert.
Spec. Nov. Regni Veg. 54: 59. 1944): Huperzia selago
(L.) Bernh. ex Schrank & Mart. ( Lycopodium selago
L.). Circumscription sensu Wagner & Beitel (1992),
Zhang & Kung (1998, 2000a), Zhang & Iwatsuki
(2013), Øllgaard (2015), and Field et al. (2016).
Monophyletic (Field et al., 2016). 25 species.
Phlegmariurus Holub, Preslia 36(1): 17, 21. 1964.
Type: Phlegmariurus phlegmaria (L.) T.Sen & U.Sen
( Lycopodium phlegmaria L.). Circumscription
sensu Wagner & Beitel (1992), Zhang & Kung
(1999, 2000b), Øllgaard (2012a, 2012b, 2015), Field
& Bostock (2013), Zhang & Iwatsuki (2013), Øllgaard
& Windisch (2014), and Field et al. (2016). Monophyletic (Field et al., 2016). About 250 species.
Phylloglossum Kunze, Bot. Zeitung (Berlin) 1: 721.
1843. Type: Phylloglossum drummondii Kunze. Circumscription sensu Field et al. (2016). Monotypic
(Field et al., 2016).
B. Order Isoёtales Prantl, Lehrb. Bot.: 116, 125. 1874.
Circumscription equivalent to family Isoëtaceae in this
J. Syst. Evol. 9999 (9999): 1–40, 2016
classification. Monophyletic (Rydin & Wikstr€
om, 2002;
Hoot et al., 2006; Lars
en & Rydin, 2016). One family, one
genus, and about 250 species.
2. Family Isoёtaceae Dumort., Anal. Fam. Pl.: 67. 1829.
Circumscription sensu Jermy (1990a). Monophyletic
(Rydin & Wikstr€
om, 2002; Hoot et al., 2006; Lars
en &
Rydin, 2016). One genus and about 250 species.
Isoёtes L., Sp. Pl. 2: 1100. 1753. Type: Isoëtes lacustris L.
Circumscription sensu Jermy (1990a). Monophyletic
n & Rydin, 2016). About 250 species.
(Larse
C. Order Selaginellales Prantl, Lehrb. Bot.: 116, 124. 1874.
Circumscription equivalent to family Selaginellaceae in
this classification. Monophyletic (Korall et al., 1999;
Korall & Kenrick, 2004; Zhou et al., 2015; Weststrand &
Korall, 2016a). One family, one genus, and perhaps 700
species.
3. Family Selaginellaceae Willk., Anleit. Stud. Bot. 2: 163.
1854. Circumscription sensu Jermy (1990b). Monophyletic (Korall et al., 1999; Korall & Kenrick, 2004; Zhou
et al., 2015; Weststrand & Korall, 2016a). One genus and
perhaps 700 species.
Selaginella P.Beauv., Mag. Encycl. 9(5): 478. 1804.
Type: Selaginella selaginoides (L.) P.Beauv. ex Schrank
& Mart. ( Lycopodium selaginoides L.). Circumscription sensu Jermy (1990b). Monophyletic (Korall et al.,
1999; Korall & Kenrick, 2004; Zhou et al., 2015;
Weststrand & Korall, 2016a). Six (Zhou & Zhang,
2015) or seven (Weststrand & Korall, 2016b) subgenera
can be recognized. Perhaps 700 species.
Class Polypodiopsida Cronquist, Takht. & W.Zimm., Taxon 15:
133. 1966. Circumscription sensu Pryer et al. (2009) and Ruggiero
et al. (2015). Monophyletic (Pryer et al., 2001, 2004; Qiu et al.,
2007; Schneider et al., 2009; Ruhfel et al., 2014; Wickett et al.,
2014; Rothfels et al., 2015). Four subclasses, 11 orders, 48 families,
319 genera, and an estimated 10 578 species.
Subclass Equisetidae Warm., Osnov. Bot.: 221. 1883. Circumscription sensu Pryer et al. (2009) and Ruggiero et al. (2015).
Subclass consists of one extant order, one family, one genus,
and 15 species.
D. Order Equisetales DC. ex Bercht. & J.Presl, Prir. Rostlin: 271.
1820. Circumscription sensu Smith et al. (2006b). Order
consists of one extant family, one genus, and 15 species.
d. Pl.:
4. Family Equisetaceae Michx. ex DC., Essai Propr. Me
49. 1804. Circumscription sensu Smith et al. (2006b).
Family consists of one extant genus and 15 species.
Equisetum L., Sp. Pl. 2: 1061. 1753. Lectotype (designated by Hauke, Nova Hedwigia 30: 414. 1978):
Equisetum fluviatile L. Circumscription sensu Hauke
(1990). Monophyletic (Guillon, 2007). An isolated
genus of closely related and recently diverged species
(Des Marais et al., 2003). 15 species.
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PPG I
Subclass Ophioglossidae Klinge, Fl. Est.-Liv-Churland 1: 94. 1882.
Circumscription sensu Ruggiero et al. (2015) and equivalent to
Psilotidae in Pryer et al. (2009). Monophyletic (Pryer et al. 2001,
2004; Wickett et al., 2014; Rothfels et al., 2015). Two orders, two
families, 12 genera, and an estimated 129 species.
E. Order Psilotales Prantl, Lehrb. Bot., ed. 5: 183. 1884.
Circumscription sensu Smith et al. (2006b). Monophyletic
(Pryer et al., 2004; Rothfels et al., 2015). One family, two
genera, and an estimated 17 species.
5. Family Psilotaceae J.W.Griff. & Henfr., Microgr. Dict.:
540. 1855. Circumscription sensu Smith et al. (2006b).
Monophyletic (Pryer et al., 2004). Two genera and an
estimated 17 species.
Psilotum Sw., J. Bot. (Schrader) 1800(2): 8, 109. 1801.
Lectotype (designated by Brongn., Dict. Class. Hist. Nat.
9: 558. 1826): Psilotum triquetrum Sw. Circumscription
sensu Kramer (1990a). Only one species sampled to
date, but assumed to be monophyletic. Two species.
Tmesipteris Bernh., J. Bot. (Schrader) 1800(2): 8, 131.
1801. Type: Tmesipteris tannensis (Spreng.) Bernh. (
Lycopodium tannense Spreng.). Circumscription sensu
Kramer (1990a). Monophyletic (Perrie et al., 2010).
About 15 species.
F. Order Ophioglossales Link, Hort. Berol. 2: 151.1833.
Circumscription sensu Smith et al. (2006b). Monophyletic
(Pryer et al., 2004; Rothfels et al., 2015). One family, ten
genera, and an estimated 112 species.
6. Family Ophioglossaceae Martinov, Tekhno-Bot. Slovar: 438.
1820. Circumscription sensu Smith et al. (2006b). Monophyletic (Pryer et al., 2004; Rothfels et al., 2015). Four subfamilies,
ten genera, and an estimated 112 species.
Subfamily Helminthostachyoideae C.Presl, Suppl. Tent.
Pterid.: 58. 1845. Circumscription sensu Shinohara
et al. (2013). Subfamily consists of a single monotypic
genus.
Helminthostachys Kaulf., Enum. Filic.: 28. 1824. Type:
Helminthostachys zeylanica (L.) Hook. ( Osmunda
zeylanica L.). Circumscription sensu Wagner (1990).
Includes: Ophiala Desv. Monotypic (Hauk et al., 2003;
Shinohara et al., 2013).
Subfamily Mankyuoideae J.R.Grant & B.Dauphin, this
classification (see below). Circumscription sensu Shinohara et al. (2013). Subfamily consists of a single monotypic
genus.
9
Monophyletic (Hauk et al., 2003; Shinohara et al., 2013).
Four genera and an estimated 47 species.
Cheiroglossa C.Presl, Suppl. Tent. Pterid.: 56. 1845.
Type: Cheiroglossa palmata (L.) C.Presl ( Ophioglossum palmatum L.). Circumscription sensu Hauk et al.
(2003). Monophyletic (Hauk et al., 2003; Shinohara
et al., 2013). Two species.
Ophioderma (Blume) Endl., Gen. Pl.: 66. 1836. Type:
Ophioderma pendulum (L.) Endl. ( Ophioglossum
pendulum L.). Circumscription sensu Hauk et al.
(2003). Monophyletic (Hauk et al., 2003; Shinohara
et al., 2013). Three species.
Ophioglossum L., Sp. Pl. 2: 1062. 1753. Lectotype
(designated by J.Sm., Hist. Fil.: 369. 1875): Ophioglossum
vulgatum L. Circumscription sensu Pichi Sermolli (1977b).
Monophyletic (Hauk et al., 2003; Shinohara et al., 2013). 41
species.
Rhizoglossum C.Presl, Suppl. Tent. Pterid.: 47. 1845. Type:
Rhizoglossum bergianum (Schltdl.) C.Presl ( Ophioglossum bergianum Schltdl.). Circumscription sensu Clausen
(1938) and Pichi Sermolli (1977b). Monotypic.
Subfamily Botrychioideae C.Presl, Suppl. Tent. Pterid.: 42.
1845. Circumscription sensu Hauk et al. (2003). Monophyletic (Hauk et al., 2003; Shinohara et al., 2013). Four
genera and an estimated 63 species.
Botrychium Sw., J. Bot. (Schrader) 1800(2): 110. 1801.
Lectotype (designated by J.Sm., Hist. Fil.: 369. 1875):
Botrychium lunaria (L.) Sw. ( Osmunda lunaria L.).
Circumscription sensu Wagner (1990) and Dauphin
et al. (2014). Monophyletic (Hauk et al., 2003). About
35 species.
Botrypus Michx., Fl. Bor.-Amer. (Michaux) 2: 274.
1803. Lectotype (designated by Pic.Serm., Webbia 26:
497. 1972): Botrypus virginianus (L.) Michx. (
Osmunda virginiana L.). Circumscription sensu Hauk
et al. (2003). Includes: Osmundopteris (Milde) Small.
Not monophyletic (Hauk et al., 2003; Shinohara et al.,
2013). About two species.
Japanobotrychium Masam., Journ. Soc. Trop. Agric.
Formosa 3: 246. 1931. Type: Japanobotrychium
arisanense Masam. Monotypic (Shinohara et al.,
2013).
Mankyua B.Y.Sun, M.H.Kim & C.H.Kim, Taxon 50(4):
1020. 2002. Type: Mankyua chejuensis B.Y.Sun, M.H.
Kim & C.H.Kim. Circumscription sensu Sun et al.
(2009). Monotypic (Shinohara et al., 2013).
Sceptridium Lyon, Bot. Gaz. 40(6): 457. 1905.
Lectotype (designated by R.T.Clausen, Mem. Torrey
Bot. Club 19(2): 24. 1938): Sceptridium obliquum
(Muhl. ex Willd.) Lyon ( Botrychium obliquum
Muhl. ex Willd.). Circumscription sensu Hauk et al.
(2003). Monophyletic (Hauk et al., 2003). About 25
species.
Subfamily Ophioglossoideae C.Presl, Suppl. Tent. Pterid.:
47. 1845. Circumscription sensu Hauk et al. (2003).
Subclass Marattiidae Klinge, Fl. Est.-Liv-Churland 1: 93. 1882.
Circumscription sensu Christenhusz (2009) and Ruggiero et al.
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J. Syst. Evol. 9999 (9999): 1–40, 2016
10
The Pteridophyte Phylogeny Group
(2015). Monophyletic (Pryer et al., 2004). One order, one
family, six genera, and an estimated 111 species.
G. Order Marattiales Link, Hort. Berol. 2: 148. 1833.
Circumscription sensu Smith et al. (2006b). Monophyletic
(Pryer et al., 2004). One family, six genera, and an
estimated 111 species.
7. Family Marattiaceae Kaulf., Enum. Filic.: 31. 1824.
Circumscription sensu Smith et al. (2006b). Monophyletic (Pryer et al., 2004). Six genera and an estimated 111
species.
Angiopteris Hoffm., Commentat. Soc. Regiae Sci.
Gott. 12: 29. 1796. Type: Angiopteris evecta (G.Forst.)
Hoffm. ( Polypodium evectum G.Forst.). Circumscription sensu Murdock (2008). Includes: Archangiopteris Christ & Giesenh.; Clementea Cav.;
Macroglossum Copel.; Protangiopteris Hayata; Protomarattia Hayata; Psilodochea C.Presl. Monophyletic
(Murdock, 2008). Perhaps 30 species.
Christensenia Maxon, Proc. Biol. Soc. Washington 18
(50): 239. 1905. Type: Christensenia aesculifolia
(Blume) Maxon ( Aspidium aesculifolium Blume).
Circumscription sensu Murdock (2008). Includes:
Kaulfussia Blume.; Macrostoma Griff. Only one species
sampled to date, but assumed to be monophyletic
(Murdock, 2008). Two species.
Danaea Sm., Mem. Acad. Roy. Sci. (Turin) 5: 420, pl.9,
f.11. 1793. Type: Danaea nodosa (L.) Sm. ( Acrostichum
nodosum L.). Circumscription sensu Murdock (2008).
Includes: Heterodanaea C.Presl. Monophyletic (Christenhusz et al., 2008; Murdock, 2008). Perhaps 50 species.
Eupodium J.Sm. in Hooker, Gen. Fil. (Hooker): t.118. 1842.
Type: Eupodium kaulfussii (J.Sm.) J.Sm. ( Marattia
kaulfussii J.Sm.). Circumscription sensu Murdock (2008).
Monophyletic (Murdock, 2008). Two species.
Marattia Sw., Prodr. 8: 128. 1788. Type: Marattia alata
Sw. Circumscription sensu Murdock (2008). Includes:
Gymnotheca C.Presl; Stibasia C.Presl. Monophyletic
(Murdock, 2008). Seven species.
Ptisana Murdock, Taxon 57(3): 744. 2008. Type:
Ptisana salicina (Sm.) Murdock ( Marattia salicina
Sm.). Circumscription sensu Murdock (2008). Monophyletic (Murdock, 2008). 20 species.
Subclass Polypodiidae Cronquist, Takht. & W.Zimm., Taxon
15: 133. 1966. Circumscription sensu Pryer et al. (2008) and
Ruggiero et al. (2015). Monophyletic (Pryer et al., 2004;
Rothfels et al., 2015). Seven orders, 44 families, 300 genera,
and an estimated 10 323 species.
H. Order Osmundales Link, Hort. Berol.: 445. 1833.
Circumscription sensu Smith et al. (2006b). Order
consists of one family. One family, six genera, and an
estimated 18 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
8. Family Osmundaceae Martinov, Tekhno-Bot. Slovar.:
445. 1820. Circumscription sensu Smith et al. (2006b).
Monophyletic (Yatabe et al., 1999; Schuettpelz & Pryer,
2007; Metzgar et al., 2008). Six genera and an estimated
18 species.
Claytosmunda (Y.Yatabe, N.Murak. & K.Iwats.) Metzgar & Rouhan, this classification (see below). Type:
Claytosmunda claytoniana (L.) Metzgar & Rouhan (
Osmunda claytoniana L.). Circumscription equivalent
to Osmunda subgenus Claytosmunda in Yatabe et al.
(2005). Monotypic.
Leptopteris C.Presl, Suppl. Tent. Pterid.: 70. 1845.
Lectotype (designated by C.Chr., Index Filic. lvi.1906):
Leptopteris hymenophylloides (A.Rich.) C.Presl (
Todea hymenophylloides A.Rich.). Circumscription
sensu Kramer (1990o). Monophyletic (Yatabe et al.,
1999; Metzgar et al., 2008; Bomfleur et al., 2015). Six
species.
Osmunda L., Sp. Pl. 2: 1063. 1753. Lectotype
man, Dict. Sci. Nat. 37: 9. 1825):
(designated by Le
Osmunda regalis L. Circumscription equivalent to
subgenus Osmunda in Kramer (1990o). Monophyletic
(Yatabe et al., 1999; Metzgar et al., 2008; Bomfleur
et al., 2015). About four species.
Osmundastrum C.Presl, Gef€assb€
undel Farrn: 18. 1847.
Type: Osmundastrum cinnamomeum (L.) C.Presl (
Osmunda cinnamomea L.). Circumscription sensu
Yatabe et al. (2005). Monotypic (Miller, 1967; Yatabe
et al., 1999; Metzgar et al., 2008).
Plenasium C.Presl, Tent. Pterid.: 109, pl.3, f.13. 1836.
Lectotype (designated by C.Chr., Index Filic. lvi.
1906): Plenasium banksiaefolium (C.Presl) C.Presl. (
Nephrodium banksiaefolium C.Presl). Circumscription
equivalent to subgenus Plenasium in Kramer
(1990o). Monophyletic (Yatabe et al., 1999; Metzgar
et al., 2008; Bomfleur et al., 2015). About four
species.
Todea Willd. ex Bernh., J. Bot. (Schrader) 1800(2): 126.
1801. Type: Todea africana Willd. ex Bernh., nom illeg.
superfl. ( Acrostichum barbarum L.). Circumscription
sensu Kramer (1990o). Monophyletic (Metzgar et al.,
2008). Two species.
I. Order Hymenophyllales A.B.Frank, Syn. Pflanzenk., ed. 2, 3:
1452. 1877. Circumscription sensu Smith et al. (2006b). Order
consists of one family, nine genera, and an estimated 434
species.
9. Family Hymenophyllaceae Mart., Consp. Regn. Veg.: 3.
1835. Circumscription sensu Smith et al. (2006b).
Monophyletic (Schuettpelz & Pryer, 2007). Two subfamilies, nine genera, and an estimated 434 species.
Subfamily Trichomanoideae C.Presl, Hymenophyllaceae:
102. 1843. Circumscription equivalent to “trichomanoids”
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PPG I
in Ebihara et al. (2006). Monophyletic (Pryer et al., 2001;
Dubuisson et al., 2003; Ebihara et al., 2007). Relationships
among the trichomanoid genera are still mostly unresolved. Eight genera and an estimated 184 species.
Abrodictyum C.Presl, Hymenophyllaceae: 20. 1843.
Type: Abrodictyum cumingii C.Presl. Circumscription
sensu Ebihara et al. (2006). Monophyletic (Ebihara
et al., 2007). About 25 species.
11
Hymenophyllum tunbrigense (L.) Sm. ( Trichomanes tunbrigense L.). Circumscription sensu
Ebihara et al. (2006). Monophyletic (Pryer et al.,
2001; Hennequin et al., 2006; Ebihara et al., 2007).
About 250 species.
J. Order Gleicheniales Schimp., Trait
e Pal
eont. V
eg. 1: 669.
1869. Circumscription sensu Smith et al. (2006b). Monophyletic (Pryer et al., 2004). Three families, ten genera, and
an estimated 172 species.
Callistopteris Copel., Philipp. J. Sci. 67: 49. 1938. Type:
Callistopteris apiifolia (C.Presl) Copel. ( Trichomanes
apiifolium C.Presl). Circumscription sensu Ebihara
et al. (2006). Monophyletic (Ebihara et al., 2007).
Five species.
10. Family Matoniaceae C.Presl, Gef€assb€
undel Farrn: 32.
1847. Circumscription sensu Smith et al. (2006b).
Monophyletic (Kato & Setoguchi, 1998). Two genera
and an estimated four species.
Cephalomanes C.Presl, Hymenophyllaceae: 17. 1843.
Type: Cephalomanes atrovirens C.Presl. Circumscription sensu Ebihara et al. (2006). Monophyletic
(Ebihara et al., 2007). Four species.
Matonia R.Br. ex Wall., Pl. Asiat. Rar. 1(1): 16. 1829.
Type: Matonia pectinata R.Br. Circumscription sensu
Kramer (1990l). Monophyletic (Kato & Setoguchi,
1998). Two species.
Crepidomanes C.Presl, Epimel. Bot.: 258. 1851. Type:
Crepidomanes intramarginale (Hook. & Grev.) C.Presl
( Trichomanes intramarginale Hook. & Grev.).
Circumscription sensu Ebihara et al. (2006). Includes:
Nesopteris Copel. Monophyletic (Ebihara et al., 2007).
About 30 species.
Phanerosorus Copel., Philipp. J. Sci. C 3(6): 344. 1909.
Type: Phanerosorus sarmentosus (Baker) Copel. (
Matonia sarmentosa Baker). Circumscription sensu
Kramer (1990l). Monophyletic (Kato & Setoguchi,
1998). Two species.
m. Soc. Linn. Paris 6: 330.
Didymoglossum Desv., Me
1827. Lectotype (designated by C.Chr., Index Filic. xiv.
1906): Didymoglossum hymenoides (Hedw.) Copel. (
Trichomanes hymenoides Hedw.). Circumscription
sensu Ebihara et al. (2006). Monophyletic (Ebihara
et al., 2007). About 30 species.
Polyphlebium Copel., Philipp. J. Sci. 67: 55. 1938. Type:
Polyphlebium venosum (R.Br.) Copel. ( Trichomanes
venosum R.Br.). Circumscription sensu Ebihara et al.
(2006). Monophyletic (Ebihara et al., 2007). About 15
species.
Trichomanes L., Sp. Pl. 2: 1097. 1753. Lectotype
(designated by Underw., Mem. Torrey Bot. Club 6:
256, 283. 1899): Trichomanes crispum L. Circumscription sensu Ebihara et al. (2006). Monophyletic
(Ebihara et al., 2007). About 60 species.
Vandenboschia Copel., Philipp. J. Sci. 67: 51. 1938.
Type: Vandenboschia radicans (Sw.) Copel. ( Trichomanes radicans Sw.). Circumscription sensu Ebihara
et al. (2006). Monophyletic (Ebihara et al., 2007).
About 15 species.
Subfamily Hymenophylloideae Burnett, Outlines Bot.:
324. 1835. Circumscription equivalent to “hymenophylloids” in Ebihara et al. (2006). Subfamily consists of one
genus and an estimated 250 species.
m. Acad. Roy. Sci.
Hymenophyllum Sm., M e
(Turin) 5: 418, pl.9, f.8. 1793. Lectotype (designated by C.Presl, Hymenophyllaceae: 1. 1844):
www.jse.ac.cn
11. Family Dipteridaceae Seward & E.Dale, Philos. Trans.,
Ser. B. 194: 487, 499, 502. 1901. Circumscription sensu
Smith et al. (2006b). Monophyletic (Pryer et al., 2004).
Two genera and an estimated 11 species.
Cheiropleuria C.Presl, Epimel. Bot.: 189. 1851. Lectotype
(designated by J.Sm., Hist. Fil.: 139. 1875): Cheiropleuria
bicuspis (Blume) C.Presl ( Polypodium bicuspe Blume).
Circumscription sensu Kramer (1990b). Monophyletic
(Kato et al., 2001). Three species.
Dipteris Reinw., Syll. Pl. Nov. 2: 3. 1825. Type: Dipteris
conjugata Reinw. Circumscription sensu Kramer
(1990f). Presumably monophyletic (sampling limited
to date). About eight species.
12. Family Gleicheniaceae C.Presl, Reliq. Haenk. 1: 70. 1825.
Circumscription sensu Smith et al. (2006b). Monophyletic (Pryer et al., 2004). Six genera and an estimated 157
species.
Dicranopteris Bernh., Neues J. Bot. 1(2): 38–39. 1805.
Type: Dicranopteris dichotoma (Thunb.) Bernh. (
Polypodium dichotomum Thunb.). Circumscription
sensu Kramer (1990g), but excluding Gleichenella.
Sampling to date has been insufficient to fully assess
the monophyly of the genus (Li et al., 2010). Perhaps
20 species.
Diplopterygium (Diels) Nakai, Bull. Natl. Sci. Mus.
Tokyo 29: 47. 1950. Lectotype (designated by C.Chr.,
Index Filic. liv. 1906): Diplopterygium glaucum (Thunb.
ex Houtt.) Nakai ( Polypodium glaucum Thunb. ex
Houtt.). Circumscription sensu Kramer (1990g).
J. Syst. Evol. 9999 (9999): 1–40, 2016
12
The Pteridophyte Phylogeny Group
Sampling to date has been insufficient to fully assess
the monophyly of the genus (Li et al., 2010). About 25
species.
Gleichenella Ching, Sunyatsenia 5: 276. 1940. Type:
Gleichenella pectinata (Willd.) Ching ( Mertensia
pectinata Willd.). Circumscription sensu Mickel &
Smith (2004). Monotypic.
m. Acad. Roy. Sci. (Turin) 5: 419,
Gleichenia Sm., Me
pl.9, f.10. 1793. Type: Gleichenia polypodioides (L.)
Sm. ( Onoclea polypodioides L.). Circumscription
sensu Kramer (1990g). Apparently monophyletic
(Perrie et al., 2007; but see Hennequin et al., 2014),
although sampling to date has been limited. About
15 species.
15. Family Anemiaceae Link, Fil. Spec.: 23. 1841. Circumscription sensu Smith et al. (2006b). Monophyletic
(Labiak et al., 2015a). One genus and an estimated 115
species.
Anemia Sw., Syn. Fil.: 6, 155. 1806. Lectotype
(designated by Underw., Mem. Torrey Bot. Club 6:
267, 276. 1899): Anemia phyllitidis (L.) Sw. (
Osmunda phyllitidis L.). Circumscription sensu Mickel
(2016). Includes: Mohria Sw.; Colina Greene. Monophyletic (Labiak et al., 2015a). About 115 species.
L. Order Salviniales Link, Hort. Berol. 3: 155. 1833. Circumscription sensu Smith et al. (2006b). Monophyletic (Pryer et al.,
1995; Pryer, 1999; Schuettpelz & Pryer, 2007; Rothfels et al.,
2015). Two families, five genera, and an estimated 82
species.
Sticherus C.Presl, Tent. Pterid.: 51. 1836. Lectotype
(designated by C.Chr., Index Filic. liv. 1906):
Sticherus laevigatus (Willd.) C.Presl ( Mertensia
laevigata Willd.). Circumscription sensu Kramer
(1990g). Apparently monophyletic (Perrie et al.,
2007), although sampling to date has been limited.
About 95 species.
16. Family Salviniaceae Martinov, Tekhno-Bot.Slovar.: 559.
1820. Circumscription sensu Smith et al. (2006b).
Monophyletic (Pryer et al., 1995; Pryer, 1999; Schuettpelz
& Pryer, 2007; Nagalingum et al., 2008). Two genera and
an estimated 21 species.
Stromatopteris Mett., Ann. Sci. Nat. Bot., ser. 4, 15: 84.
1861. Type: Stromatopteris moniliformis Mett. Circumscription sensu Kramer (1990g). Monotypic.
Azolla Lam., Encycl. 1(1): 343. 1783. Type: Azolla
filiculoides Lam. Circumscription sensu Schneller
(1990a). Monophyletic (Metzgar et al., 2007; Reid
et al., 2006; Nagalingum et al., 2008). About nine
species.
K. Order Schizaeales Schimp., Trait
e Pal
eont. V
eg. 1: 674. 1869.
Circumscription sensu Smith et al. (2006b). Monophyletic
(Schuettpelz & Pryer, 2007). Three families, four genera,
and an estimated 190 species.
13. Family Lygodiaceae M.Roem., Handb. Allg. Bot. 3: 520.
1840. Circumscription sensu Smith et al. (2006b).
Monophyletic (Wikstr€
om et al., 2002). One genus and
an estimated 40 species.
Lygodium Sw., J. Bot. (Schrader) 1800(2): 7, 106. 1801.
Type: Lygodium scandens (L.) Sw. ( Ophioglossum
scandens L.). Circumscription sensu Kramer (1990q).
€ m et al., 2002). Perhaps 40
Monophyletic (Wikstro
species.
14. Family Schizaeaceae Kaulf., Wesen Farrenkr.: 119. 1827.
Circumscription sensu Smith et al. (2006b). Monophy€ m et al., 2002). Two genera and an
letic (Wikstro
estimated 35 species.
Actinostachys Wall., Numer. List 1. 1829. Type:
Actinostachys digitata (L.) Wall. ( Acrostichum
digitatum L.). Circumscription sensu Mickel & Smith
€ m et al., 2002). About
(2004). Monophyletic (Wikstro
15 species.
m. Acad. Roy. Sci. (Turin) 5: 419, pl.9,
Schizaea Sm., Me
f.9. 1793. Type: Schizaea dichotoma (L.) J.Sm. (
Acrostichum dichotomum L.). Circumscription sensu
€m
Mickel & Smith (2004). Monophyletic (Wikstro
et al., 2002). Perhaps 20 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Salvinia S
eg., Pl. Veron. 3: 52. 1754. Type: Salvinia
natans (L.) All. ( Marsilea natans L.). Circumscription
sensu Schneller (1990b). Monophyletic (Nagalingum
et al., 2008). About 12 species.
17. Family Marsileaceae Mirb., Hist. Nat. Veg. 5: 126. 1802.
Circumscription sensu Smith et al. (2006b). Monophyletic
(Pryer, 1999; Schuettpelz & Pryer, 2007; Nagalingum et al.,
2008). Three genera and an estimated 61 species.
Marsilea L., Sp. Pl. 2: 1099. 1753. Lectotype (designated by Maxon, Sci. Surv. Porto Rico & Virgin Islands
6(3): 509. 1926): Marsilea quadrifolia L. Circumscription sensu Kramer (1990k). Monophyletic (Nagalingum et al., 2007, 2008; Whitten et al., 2012). About 55
species.
Pilularia L., Sp. Pl. 2: 1100. 1753. Type: Pilularia
globulifera L. Circumscription sensu Kramer (1990k).
Monophyletic (Nagalingum et al., 2008). About five
species.
Regnellidium Lindm., Ark. Bot. 3(6): 2. 1904. Type:
Regnellidium diphyllum Lindm. Circumscription sensu
Kramer (1990k). Monotypic.
M. Order Cyatheales A.B.Frank in Leunis, Syn. Pflanzenk. (ed.
2) 3: 1452. 1877. Circumscription sensu Smith et al. (2006b).
Monophyletic (Korall et al., 2006; Schuettpelz et al., 2007;
Rothfels et al., 2015). Eight families, 13 genera, and an
estimated 713 species
www.jse.ac.cn
PPG I
18. Family Thyrsopteridaceae C.Presl, Gef€assb€
undel Farrn:
22, 38. 1847. Circumscription sensu Smith et al. (2006b).
Family consists of a single monotypic genus.
Thyrsopteris Kunze, Linnaea 9: 507. 1835. Type:
Thyrsopteris elegans Kunze. Circumscription sensu
Kramer (1990e). Includes: Panicularia Colla. Monotypic
(Korall et al., 2006).
19. Family Loxsomataceae C.Presl, Gef€assb€
undel Farrn: 31.
1847. Circumscription sensu Smith et al. (2006b). Monophyletic (Korall et al., 2006). Two monotypic genera.
Loxsoma R.Br. ex Hook. in A.Cunn., Companion Bot.
Mag. 2: 366. 1837. Type: Loxsoma cunninghamii R.Br.
ex Hook. Circumscription sensu Kramer (1990j).
e. Monotypic.
Includes: Chrysodium Fe
Loxsomopsis Christ, Bull. Herb. Boissier, ser. 2, 4(5): 399.
1904. Type: Loxsomopsis costaricensis Christ. Circumscription sensu Lehnert et al. (2001). Monotypic.
20. Family Culcitaceae Pic.Serm., Webbia 24: 702. 1970.
Circumscription sensu Smith et al. (2006b). Monophyletic (Korall et al., 2006). One genus and two species.
13
rostratum Humb. & Bonpl. ex Willd.). Circumscription
sensu Cardenas et al. (2016). Includes: Amphidesmium
J.Sm.; Amphidesmium Schott ex Kunze. Monophyletic
(Cardenas et al., 2016). Six species.
24. Family Dicksoniaceae M.R.Schomb., Reis. Br.-Guiana 2:
1047. 1849. Circumscription sensu Smith et al. (2006b).
Monophyletic (Korall et al., 2006; Adjie & Lestari, 2014;
Noben et al., pers. comm.). Three genera and an
estimated 35 species.
Calochlaena (Maxon) M.D.Turner & R.A.White,
Amer. Fern J. 78(3): 91. 1988. Type: Culcita dubia
(R.Br.) Maxon ( Davallia dubia R.Br.). Circumscription sensu White & Turner (1988). Monophyletic
(Adjie & Lestari, 2014; Noben et al., pers. comm.).
Five species.
r., Sert. Angl. 30. 1789. Lectotype
Dicksonia L’He
(designated by J.Sm., Hist. Fil.: 254. 1875): Dicksonia
r. Circumscription sensu Kramer
arborescens L’He
(1990e). Includes: Balantium Kaulf. Monophyletic
(Noben et al., pers. comm.). 26 species.
Culcita C.Presl, Tent. Pterid.: 135, t.5, f.5. 1836. Type:
Culcita macrocarpa C.Presl. Circumscription sensu
White & Turner (1988). Monophyletic (Korall et al.,
2006). Two species.
Lophosoria C.Presl, Gef€assb€
undel Farrn: 36. 1847.
Lectotype (designated by J.Sm., Hist. Fil.: 251. 1875):
Lophosoria pruinata (Sw.) C.Presl ( Polypodium
pruinatum Sw.). Circumscription sensu Kramer
(1990i). Includes: Trichosorus Liebm. Monophyletic
(Noben et al., pers. comm.). About four species.
21. Family Plagiogyriaceae Bower, Ann. Bot. (Oxford) 40:
484. 1926. Circumscription sensu Smith et al. (2006b).
Family consists of a single genus and an estimated 15
species.
25. Family Cyatheaceae Kaulf., Wesen Farrenkr.: 119. 1827.
Circumscription sensu Smith et al. (2006b). Monophyletic (Korall et al., 2006, 2007). Three genera and an
estimated 643 species.
Plagiogyria (Kunze) Mett., Abh. Senckenberg. Naturf.
Ges. 2: 1, 268. 1858. Lectotype (designated by C.Chr.,
Index Filic. xliii. 1906): Plagiogyria euphlebia (Kunze)
Mett. ( Lomaria euphlebia Kunze). Circumscription
sensu Kramer (1990p). Presumably monophyletic;
seven species sampled to date (Korall et al., 2006;
Ebihara, 2011). 15 species.
Alsophila R.Br., Prodr.: 158. 1810. Type: Alsophila
australis R.Br. Circumscription sensu Conant (1983).
Includes: Amphicosmia Gardner; Dichorexia C.Presl;
Gymnosphaera Blume; Nephelea R.M.Tryon; Thysanobotrya Alderw. Monophyletic (Korall et al., 2007). 275
species.
22. Family Cibotiaceae Korall, Taxon 55(3): 712. 2006.
Circumscription sensu Smith et al. (2006b). Family
consists of a single genus and an estimated nine species.
Cibotium Kaulf., Berlin. Jahrb. Pharm. Verbundenen
Wiss. 21: 53. 1820. Type: Cibotium chamissoi Kaulf.
Circumscription sensu Kramer (1990e). Includes:
Pinonia Gaudich. Monophyletic (Geiger et al., 2013).
Nine species.
23. Family Metaxyaceae Pic.Serm., Webbia 24(2): 701.
1970. Circumscription sensu Smith et al. (2006b).
Family consists of a single genus and an estimated six
species.
Metaxya C.Presl, Tent. Pterid.: 59. 1836. Type:
Metaxya rostrata (Kunth) C.Presl ( Polypodium
www.jse.ac.cn
m. Acad. Roy. Sci. (Turin) 5: 416.
Cyathea Sm., Me
1793. Lectotype (designated by J.Sm., Hist. Fil.: 244.
1875): Cyathea arborea (L.) Sm. ( Polypodium
arboreum L.). Circumscription sensu Korall et al.
(2007). Includes: Actinophlebia C.Presl; Chnoophora
Kaulf.; Cnemidaria C.Presl; Cnemidopteris Reichenb.;
Cormophyllum Newm.; Disphenia C.Presl; Hemitelia
R.Br.; Hemistegia C.Presl; Hymenophyllopsis K.I.
Goebel; Microstegnus C.Presl; Trichopteris C.Presl;
Cyathidaria Caluff. Monophyletic (Korall et al.,
2007). 265 species.
Sphaeropteris Bernh., J. Bot. (Schrader) 1800(2): 122.
1801. Type: Sphaeropteris medullaris (G.Forst.) Bernh.
( Polypodium medullare G.Forst.). Circumscription
sensu Tryon (1970). Includes: Eatoniopteris Bomm.;
Fourniera Bomm.; Schizocaena J.Sm. Monophyletic
(Korall et al., 2007). 103 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
14
The Pteridophyte Phylogeny Group
N. Order Polypodiales Link, Hort. Berol. 2: 5. 1833. Circumscription sensu Smith et al. (2006b). Monophyletic
(Schuettpelz & Pryer, 2007). Six suborders, 26 families,
253 genera, and an estimated 8714 species.
Suborder Saccolomatineae Hovenkamp, this classification (see below). Circumscription equivalent to family
Saccolomataceae in this classification and in Smith et al.
(2006b). Additional investigation is needed to establish
monophyly. One family, one genus, and an estimated 18
species.
26. Family Saccolomataceae Doweld, Phytologia 90(3): 417.
2008. Circumscription sensu Smith et al. (2006b).
Contains a single genus, but additional investigation
is needed (see below). An estimated 18 species.
Saccoloma Kaulf., Berlin. Jahrb. Pharm. Verbundenen
Wiss. 21: 51. 1820. Type: Saccoloma elegans Kaulf.
Circumscription sensu Kramer (1990d). Includes:
Orthiopteris Copel. Additional investigation is needed
(Perrie et al., 2015), as indications that the genus is not
monophyletic may be based on errors in sequencing
or mixed samples. 18 species.
Suborder Lindsaeineae Lehtonen & Tuomisto, this classification (see below). Circumscription equivalent to Lindsaeaceae in Smith et al. (2006b). Probably monophyletic, but
needs to be confirmed with additional data (Lehtonen et al.,
2012). Three families, nine genera, and an estimated 237
species.
27. Family Cystodiaceae J.R.Croft, Kew Bull. 41(4): 797. 1986.
Circumscription sensu Christenhusz et al. (2011). Family
consists of a single monotypic genus.
Cystodium J.Sm, Gen. Fil. (Hooker) t.96. 1841. Type:
Cystodium sorbifolium (Sm.) J.Sm. ( Dicksonia
sorbifolia Sm.). Circumscription sensu Kramer
(1990e). Monotypic.
28. Family Lonchitidaceae Doweld, New Syllab. Pl. Fam.:
353. 2006. Circumscription sensu Christenhusz et al.
(2011). Family consists of a single genus and an
estimated two species.
Lonchitis L., Sp. Pl. 2: 1078. 1753. Lectotype (designated by Brongn., Dict. Class. Hist. Nat. 9: 490. 1826):
Lonchitis hirsuta L. Circumscription sensu Kramer
(1990d). Presumably monophyletic, but only one
species sampled to date. An estimated two species.
29. Family Lindsaeaceae C.Presl ex M.R.Schomb., Reis. Br.Guiana 3: 883. 1849. Circumscription sensu Christenhusz
et al. (2011). Monophyletic (Lehtonen et al., 2010). Seven
genera and an estimated 234 species.
m. Acad. Roy. Sci. (Turin)
Lindsaea Dryand. ex Sm., Me
5: 413, pl.9, f.4. 1793. Lectotype (designated by
Maxon, Sci. Surv. Porto Rico & Virgin Islands 6(3):
488. 1926): Lindsaea guianensis (Aubl.) Dryand. (
J. Syst. Evol. 9999 (9999): 1–40, 2016
Adiantum guianense Aubl.). Circumscription sensu
Lehtonen et al. (2010). Includes: Guerinia J.Sm.;
Humblotiella Tardieu; Lindsaenium F
ee; Odontoloma
Maxon; Sambirania Tardieu; Schizolegnia Alston;
Schizoloma Gaudich.; Synaphlebium J.Sm. Monophyletic (Lehtonen et al., 2010). About 180 species.
Nesolindsaea Lehtonen & Christenh., Bot. J. Linn.
Soc. 163(3): 336–337. 2010. Type: Nesolindsaea
caudata (Hook.) Lehtonen & Christenh. ( Lindsaea
caudata Hook.). Circumscription sensu Lehtonen
et al. (2010). Monophyletic (Lehtonen et al., 2010).
Two species.
e, Me
m. Foug., 5. Gen. Filic. 325. 1852.
Odontosoria Fe
e ( Davallia
Type: Odontosoria uncinella (Kunze) Fe
uncinella Kunze). Circumscription sensu Lehtonen
et al. (2010). Includes: Lindsayopsis Kuhn. Monophyletic (Lehtonen et al., 2010). About 23 species.
Osmolindsaea (K.U.Kramer) Lehtonen & Christenh.,
Bot. J. Linn. Soc. 163(3): 335. 2010. Type: Osmolindsaea
odorata (Roxb.) Lehtonen & Christenh. ( Lindsaea
odorata Roxb.). Circumscription sensu Lehtonen et al.
(2010, 2013). Monophyletic (Lehtonen et al., 2010,
2013). About seven species.
Sphenomeris Maxon, J. Wash. Acad. Sci. 3(5): 144.
1913. Type: Sphenomeris clavata (L.) Maxon (
Adiantum clavatum L.). Circumscription sensu Lehtonen et al. (2010). Only one species sampled to
date, but assumed to be monophyletic. Three
species.
Tapeinidium (C.Presl) C.Chr., Index Filic.: 631. 1906.
Lectotype (designated by Copel., Ann. Cryptog.
Phytopathol. 5 [Gen. Fil.]: 53. 1947): Tapeinidium
pinnatum (Cav.) C.Chr. ( Davallia pinnata Cav.).
Circumscription sensu Lehtonen et al. (2010). Includes: Protolindsaya Copel. Monophyletic (Lehtonen
et al., 2010). 18 species.
Xyropteris K.U.Kramer, Acta Bot. Neerl. 6: 599. 1958.
Type: Xyropteris stortii (Alderw.) K.U.Kramer (
Schizoloma stortii Alderw.). Circumscription sensu
Lehtonen et al. (2010). Monotypic.
Suborder Pteridineae J.Prado & Schuettp., this classification (see below). Circumscription equivalent to family
Pteridaceae in this classification and in Smith et al.
(2006b). Monophyletic (Schuettpelz & Pryer, 2007;
Rothfels et al., 2015). One family, 53 genera, and an
estimated 1211 species.
30. Family Pteridaceae E.D.M.Kirchn., Schul-Bot.: 109. 1831.
Circumscription sensu Smith et al. (2006b). Monophyletic (Schuettpelz & Pryer, 2007). Five subfamilies, 53
genera, and an estimated 1211 species.
Subfamily Parkerioideae Burnett, Outlines Bot.: 324.
1835, as “Parkeridae”. Circumscription equivalent to
www.jse.ac.cn
PPG I
“ceratopteridoids” in Schuettpelz et al. (2007). Monophyletic (Schuettpelz et al., 2007). Two genera and an
estimated nine species.
Acrostichum L., Sp. Pl. 2: 1067. 1753. Lectotype
(designated by J.Sm., Hist. Fil.: 146. 1875): Acrostichum aureum L. Circumscription sensu Tryon et al.
(1990). Monophyletic (Schuettpelz et al., 2007). Three
species.
Ceratopteris Brongn., Bull. Sci. Soc. Philom. Paris
1821: 186. 1822. Lectotype (designated by Brongn.,
Dict. Class. Hist. Nat. 3: 350. 1823): Ceratopteris
thalictroides (L.) Brongn. ( Acrostichum thalictroides L.). Circumscription sensu Tryon et al. (1990).
Monophyletic (Schuettpelz et al., 2007). Perhaps six
species.
Subfamily Cryptogrammoideae S.Lindsay, Edinburgh. J.
Bot. 66(2): 358. 2009. Circumscription equivalent to
“cryptogrammoids” in Schuettpelz et al. (2007).
Monophyletic (Schuettpelz et al., 2007; Metzgar
et al., 2013). Three genera and an estimated 31 species.
e, Me
m. Foug., 5. Gen. Filic.: 167.
Coniogramme Fe
e (
1852. Type: Coniogramme javanica (Blume) Fe
Gymnogramma javanica Blume). Circumscription
sensu Tryon et al. (1990). Monophyletic (Metzgar
et al., 2013). At least 20 species.
Cryptogramma R.Br., Narr. Journey Polar Sea: 767.
1823. Type: Cryptogramma acrostichoides R.Br. Circumscription sensu Metzgar et al. (2013) and Jessen
et al. (2012). Monophyletic (Metzgar et al., 2013).
About 10 species.
Llavea Lag., Gen. Sp. Pl.: 33. 1816. Type: Llavea
cordifolia Lag. Circumscription sensu Tryon et al.
(1990). Monotypic.
Subfamily Pteridoideae Link, Fil. Spec.: 48. 1841.
Circumscription sensu Zhang et al. (2015). Monophyletic
(Schuettpelz et al., 2007; Zhang et al., 2015). 13 genera
and an estimated 400 species.
Actiniopteris Link, Fil. Spec.: 79. 1841. Lectotype
(designated by Pic.Serm., Webbia 17: 6–7. 1962):
Actiniopteris radiata (Sw.) Link ( Asplenium
radiatum Sw.). Circumscription sensu Tryon et al.
(1990). Monophyletic (Schneider et al., 2013). Six
species.
Anogramma Link, Fil. Spec.: 137. 1841. Lectotype
(designated by C.Chr., Index Filic. xxxvii. 1906):
Anogramma leptophylla (L.) Link ( Polypodium
leptophyllum L.). Circumscription sensu Nakazato &
Gastony (2003). Polyphyletic (Schneider et al., 2013;
Hennequin et al., 2014). About five species.
Austrogramme E.Fourn., Ann. Sci. Nat. Bot., ser. 5, 18:
278. 1873. Lectotype (designated by C.Chr., Index Filic.
www.jse.ac.cn
15
xxxvii. 1906): Austrogramme marginata (Mett.) E.
Fourn. ( Gymnogramma marginata Mett.). Circumscription sensu Tryon et al. (1990). Monophyletic
(Cochran et al., 2014), but relatively few species
sampled. Six species.
Cerosora Domin, Acta Bot. Bohem. 8: 3. 1929. Type:
Cerosora chrysosora (Baker) Domin ( Gymnogramma
chrysosora Baker). Circumscription sensu Schneider
et al. (2013). Monophyletic (Schneider et al., 2013).
Four species.
Cosentinia Tod., Giorn. Sci. Nat. Econ. Palermo 1: 219.
1866. Type: Cosentinia vellea (Aiton) Tod. ( Acrostichum velleum Aiton). Circumscription sensu Tryon
et al. (1990). Monotypic.
Jamesonia Hook. & Grev., Pl. Voy. Russes Monde 2:
t.178. 1830. Type: Jamesonia pulchra Hook. & Grev.
n-Mora & Gonzalez
Circumscription sensu Pabo
e; Nephopteris Lellinger.
(2015). Includes: Eriosorus Fe
n-Mora & Gonzalez, 2015). About
Monophyletic (Pabo
50 species.
Onychium Kaulf., Berlin. Jahrb. Pharm. Verbundenen
Wiss. 21: 45. 1820. Type: Onychium capense Kaulf.
Circumscription sensu Tryon et al. (1990). Monophyletic (Schuettpelz et al., 2007). Perhaps 10 species.
Pityrogramma Link, Handbuch 3: 19–20. 1833. Type:
Pityrogramma chrysophylla (Sw.) Link ( Acrostichum
chrysophyllum Sw.). Circumscription sensu Tryon
et al. (1990). Includes: Trismeria F
ee. Presumably
monophyletic, but sampling incomplete (Schneider
et al., 2013; Zhang et al., 2015). About 20 species.
Pteris L., Sp. Pl. 2: 1073. 1753. Lectotype (designated
by J.Sm., Hist. Fil.: 295. 1875): Pteris longifolia L.
Circumscription sensu Zhang et al. (2015). Includes:
Afropteris Alston; Anopteris Prantl ex Diels; Ochropteris J.Sm.; Neurocallis F
ee; Platyzoma R.Br. Monophyletic (Chao et al., 2014; Zhang et al., 2015). Perhaps
250 species.
e, Me
m. Soc. Hist. Nat. Strasbourg 4
Pterozonium Fe
(1): 202. 1850. Type: Pterozonium reniforme (Mart.)
e ( Gymnogramma reniformis Mart.). CircumscripFe
tion sensu Tryon et al. (1990). Monophyletic (Cochran
et al., 2014), but relatively few species sampled. 14
species.
Syngramma J.Sm., London J. Bot. 4: 168–169. 1845.
Lectotype (designated by J.Sm., Hist. Fil.: 152. 1875):
Syngramma alismifolia (C.Presl) J.Sm. ( Diplazium
alismifolium C.Presl). Circumscription sensu Tryon
et al. (1990). Only one species sampled to date, but
assumed to be monophyletic. About 15 species.
Taenitis Willd. ex Schkuhr, Kl. Linn. Pfl.-Syst. 1: 20.
1804. Type: Taenitis pteroides Willd. ex Schkuhr.
Circumscription sensu Tryon et al. (1990).
J. Syst. Evol. 9999 (9999): 1–40, 2016
16
The Pteridophyte Phylogeny Group
Monophyletic (Cochran et al., 2014), but sampling
insufficient. About 15 species.
Monophyletic (Schuettpelz et al., 2016). About 10
species.
Tryonia Schuettp., J.Prado & A.T.Cochran, PhytoKeys
35: 35–37. 2014. Type: Tryonia myriophylla (Sw.)
Schuettp., J.Prado & A.T.Cochran ( Gymnogramma
myriophylla Sw.). Circumscription sensu Cochran et al.
(2014). Monophyletic (Cochran et al., 2014). Four
species.
Radiovittaria (Benedict) E.H.Crane, Syst. Bot. 22: 514–515.
1997 (1998). Type: Radiovittaria remota (F
ee) E.H.Crane
( Vittaria remota F
ee). Circumscription sensu Schuettpelz et al. (2016). Monophyletic (Schuettpelz et al., 2016).
About 10 species.
Subfamily Vittarioideae Link, Fil. Spec.: 116. 1841.
Circumscription equivalent to “adiantoids“ in Schuettpelz et al. (2007). Monophyletic (Prado et al., 2007;
Schuettpelz et al., 2007; Rothfels & Schuettpelz, 2014).
12 genera and an estimated 345 species.
Adiantum L., Sp. Pl. 2: 1094. 1753. Lectotype
(designated by J.Sm., Hist. Fil.: 274. 1875): Adiantum
capillus-veneris L. Circumscription sensu Tryon et al.
(1990). Monophyletic (Rothfels & Schuettpelz, 2014;
Pryer et al., 2016). About 225 species.
Ananthacorus Underw. & Maxon, Contr. U.S. Natl.
Herb. 10: 487. 1908. Type: Ananthacorus angustifolius
(Sw.) Underw. & Maxon ( Pteris angustifolia Sw.).
Circumscription sensu Schuettpelz et al. (2016).
Monotypic (Schuettpelz et al., 2016).
Antrophyopsis (Benedict) Schuettp., Taxon 65(4): 717.
2016. Type: Antrophyopsis boryana (Willd.) Schuettp.
( Hemionitis boryana Willd.). Circumscription sensu
Schuettpelz et al. (2016). Monophyletic (Schuettpelz
et al., 2016). Three species.
Antrophyum Kaulf., Enum. Filic.: 197, 282. 1824.
Lectotype (designated by J.Sm., Hist. Fil.: 154. 1875):
Antrophyum plantagineum (Cav.) Kaulf. ( Hemionitis
plantaginea Cav.). Circumscription sensu Schuettpelz
et al. (2016). Monophyletic (Schuettpelz et al., 2016).
Perhaps 40 species.
Haplopteris C.Presl, Tent. Pterid.: 141. 1836. Type:
Haplopteris scolopendrina (Bory) C.Presl ( Pteris
scolopendrina Bory). Circumscription sensu Schuettpelz et al. (2016). Includes: Pleurofossa Nakai ex H.Ito;
Monogramma Comm. ex Schkuhr (proposal to
conserve Haplopteris against Monogramma pending;
Chen et al., 2016). Monophyletic (Schuettpelz et al.,
2016). Perhaps 40 species.
Hecistopteris J.Sm., London J. Bot. 1: 193. 1842. Type:
Hecistopteris pumila (Spreng.) J.Sm. ( Gymnogramma pumila Spreng.). Circumscription sensu
Schuettpelz et al. (2016). Presumably monophyletic,
but only one species sampled to date (Schuettpelz
et al., 2016). Three species.
m. Soc. Linn. Paris 6: 174, 218.
Polytaenium Desv., Me
1827. Type: Polytaenium lanceolatum (Sw.) Desv. (
Vittaria lanceolata Sw.). Circumscription sensu Schuettpelz et al. (2016). Includes: Anetium Splitg.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Rheopteris Alston, Nova Guinea, n.s. 7: 2. 1956. Type:
Rheopteris cheesmaniae Alston. Circumscription sensu
Schuettpelz et al. (2016). Monotypic.
Scoliosorus T.Moore, Index Fil. xxix. 1857. Type:
Scoliosorus ensiformis (Hook.) T.Moore ( Antrophyum
ensiforme Hook.). Circumscription sensu Schuettpelz
et al. (2016). Monotypic (Schuettpelz et al., 2016).
e, Me
m. Foug., 3. Hist. Vittar.: 30–31.
Vaginularia Fe
e. Circumscription
1852. Type: Vaginularia trichoidea Fe
sensu Schuettpelz et al. (2016). Includes: Diclidopteris
Brack. Monophyletic (Schuettpelz et al., 2016). Four
species.
m. Acad. Roy. Sci. (Turin) 5: 413, t.9,
Vittaria Sm., Me
f.5. 1793. Type: Vittaria lineata (L.) Sm. ( Pteris lineata
L.). Circumscription sensu Schuettpelz et al. (2016).
Monophyletic (Schuettpelz et al., 2016). Seven
species.
Subfamily Cheilanthoideae Horvat, Acta Bot. Inst. Bot.
Univ. Zagreb. 2: 114. 1927, as “Cheilanthinae”. Circumscription equivalent to “cheilanthoids” in Schuettpelz
et al. (2007). Monophyletic (Rothfels & Schuettpelz,
2014). 23 genera and an estimated 426 species.
Adiantopsis F
ee, M
em. Foug., 5. Gen. Filic.: 145. 1852.
Lectotype (designated by C.Chr., Index Filic. xli.
1906): Adiantopsis radiata (L.) F
ee ( Adiantum
radiatum L.). Circumscription sensu Link-P
erez et al.
(2011) with additions by Link-P
erez & Hickey (2011)
and Schuettpelz et al. (2014). Monophyletic (Linkrez et al., 2011; Schuettpelz et al., 2014). About 35
Pe
species.
e, Me
m. Foug., 5. Gen. Filic.: 153–154.
Aleuritopteris Fe
1852. Lectotype (designated by C.Chr., Index Filic. xlii.
e ( Pteris
1906): Aleuritopteris farinosa (Forssk.) Fe
farinosa Forssk.). Circumscription sensu Zhang et al.
(2013a). Includes: Leptolepidium K.H.Shing & S.K.Wu;
Sinopteris C.Chr. & Ching. Not monophyletic as
circumscribed (see Eiserhardt et al., 2011). About 40
species.
Allosorus Bernh., Neues J. Bot. 1(2): 36. 1805.
Lectotype (designated by Pic.Serm., Webbia 9: 394.
1953): Allosorus pusillus (Willd. ex Bernh.) Bernh. (
Adiantum pusillum Willd. ex Bernh.). Circumscription
sensu Christenhusz (2012). Includes: Oeosporangium
De Visiani. Questionably monophyletic as circumscribed. Eight species.
www.jse.ac.cn
PPG I
Argyrochosma (J.Sm.) Windham, Amer. Fern J. 77(2):
38. 1987. Lectotype (designated by C.Chr., Index Filic.
xl. 1906): Argyrochosma nivea (Poir.) Windham (
Pteris nivea Poir.). Circumscription sensu Windham
(1987) with additions by Wang et al. (2015).
Monophyletic (Sigel et al., 2011). About 20 species.
Aspidotis (Nutt. ex Hook.) Copel., Ann. Cryptog.
Phytopathol. 5 [Gen. Fil.]: 68. 1947. Type: Aspidotis
californica (Hook.) Nutt. ex Copel. ( Hypolepis
californica Hook.). Circumscription sensu Li et al.
(2012b). Monophyletic (Li et al., 2012b). Four
species.
Astrolepis D.M.Benham & Windham, Amer. Fern J. 82
(2): 55. 1992. Type: Astrolepis sinuata (Lag. ex Sw.) D.M.
Benham & Windham ( Acrostichum sinuatum Lag. ex
Sw.). Circumscription sensu Benham & Windham
(1992) with additions by Beck et al. (2010). Monophyletic (Beck et al., 2010). Eight species.
Bommeria E.Fourn., Dict. Bot. 1: 448. 1876 (1877).
Lectotype (designated by Maxon, Contr. U.S. Natl.
Herb. 13: 160. 1913): Bommeria ehrenbergiana
(Klotzsch) Underw. ( Gymnogramma ehrenbergiana
Klotzsch). Circumscription sensu Ranker & Haufler
(1990). Monophyletic based on limited sampling (two
species in Eiserhardt et al., 2011). Five species.
Calciphilopteris Yesilyurt & H.Schneid., Phytotaxa 7:
52. 2010. Type: Calciphilopteris ludens (Wall. ex Hook.)
Yesilyurt & H.Schneid. ( Pteris ludens Wall. ex
Hook.). Circumscription sensu Yesilyurt & Schneider
(2010). Presumably monophyletic based on morphological similarity (only one species sampled; Schuettpelz et al., 2007; Eiserhardt et al., 2011; Rothfels &
Schuettpelz, 2014). Four species.
Cheilanthes Sw., Syn. Fil. 5, 126. 1806. Lectotype
(designated by Maxon, Sci. Surv. Porto Rico & Virgin
Islands 6(3): 428. 1926): Cheilanthes micropteris Sw.
Circumscription sensu Zhang & Yatskievych (2013) but
excluding Allosorus and Mildella. Includes: Cheilosoria
Trevis.; Negripteris Pic.Serm.; Neurosoria Mett. ex
Kuhn. Not monophyletic as circumscribed (Eiserhardt
et al., 2011). About 100 species.
e, Me
m. Foug., 7. Ic. Esp. Nouv.: 33,
Cheiloplecton Fe
e
135, t.20. 1857. Type: Cheiloplecton rigidum (Sw.) Fe
( Pteris rigida Sw.). Circumscription sensu Mickel &
Smith (2004). Monotypic (Rothfels et al., 2008;
Johnson et al., 2012).
Doryopteris J.Sm. emend. J.C.Yesilyurt, J. Bot.
(Hooker) 3: 404. 1841. Lectotype (designated by
C.V.Morton, Amer. Fern J. 34: 26. 1944): Doryopteris
palmata (Willd.) J.Sm. ( Pteris palmata Willd.).
Circumscription sensu Yesilyurt et al. (2015). Includes:
Bakeriopteris C.Chr.; Cassebeera Kaulf.; Heteropteris
e; Tryonella Pic.Serm. Monophyletic (Yesilyurt
Fe
et al., 2015). 21 species.
www.jse.ac.cn
17
Gaga Pryer, F.W.Li & Windham, Syst. Bot. 37(4): 855. 2012.
Type: Gaga marginata (Kunth) F.W.Li & Windham (
Cheilanthes marginata Kunth). Circumscription sensu Li
et al. (2012b). Monophyletic (Li et al., 2012b). 19 species.
Hemionitis L., Sp. Pl. 2: 1077 1753. Lectotype (designated by Kaulf., Enum. Filic.: 68, 198. 1824): Hemionitis
palmata L. Circumscription sensu Tryon et al. (1990).
Includes: Gymnopteris Bernh.; Gymnogramma Desv.;
Neurogramma Link. Monophyletic (four species sampled in Eiserhardt et al., 2011). Five species.
Lytoneuron (Klotzsch) Yesilyurt, Phytotaxa 221(2): 116.
2015. Type: Lytoneuron lomariaceum (Klotzsch) Yesilyurt ( Doryopteris lomariacea Klotzsch). Circumscription sensu Yesilyurt et al. (2015). Monophyletic
(Yesilyurt et al., 2015). 12 species.
Mildella Trevis., Reach Ist. Lombardo Sci., Rendiconti
9: 810. 1877. Type: Mildella intramarginalis (Kaulf. ex
Link) Trevis. ( Pteris intramarginalis Kaulf. ex Link).
Circumscription sensu Hall & Lellinger (1967). Not
monophyletic as circumscribed; New World species
(including type) and Old World species belong to
different clades. Seven species.
e emend. Grusz & Windham, Me
m.
Myriopteris Fe
Foug., 5. Gen. Filic.: 148. 1852. Lectotype (designated
by Copel., Ann. Cryptog. Phytopathol. 5 [Gen. Fil.]: 65.
1947): Myriopteris marsupianthes F
ee. Circumscription
sensu Grusz & Windham (2013). Includes: Pomatophytum M.E.Jones. Monophyletic (Grusz et al., 2014).
About 45 species.
Notholaena R.Br., Prodr.: 145. 1810. Lectotype (designated by J.Sm., Hist. Fil.: 278. 1875): Notholaena
trichomanoides (L.) Desv. ( Pteris trichomanoides L.).
Circumscription sensu Rothfels et al. (2008) with
additions by Yatskievych & Arbelaez (2008). Includes:
Chrysochosma (J.Sm.) K€
ummerle. See Yatskievych &
Smith (2003) for details regarding arguments over the
typification of Notholaena. Not monophyletic as
circumscribed (Rothfels et al., 2008; Johnson et al.,
2012). About 30 species.
Ormopteris J.Sm. ex J.Sm., Hist. Fil.: 281. 1875. Type:
Ormopteris gleichenioides (Gardner) J.Sm. ( Cassebeera gleichenioides Gardner). Circumscription sensu
Yesilyurt et al. (2015). Monophyletic (Yesilyurt et al.,
2015). Six species.
Paragymnopteris K.H.Shing, Indian Fern J. 10: 227.
1993. Type: Paragymnopteris marantae (L.) K.H.Shing
( Acrostichum marantae L.). Circumscription sensu
Zhang & Ranker (2013b). Not monophyletic as
circumscribed. Five species.
Parahemionitis Panigrahi, Amer. Fern J. 83(3): 90, f.1.
1993. Type: Parahemionitis arifolia (Burm.f.) Panigrahi
( Asplenium arifolium Burm.f.). Circumscription
sensu Zhang & Ranker (2013a). Monotypic.
J. Syst. Evol. 9999 (9999): 1–40, 2016
18
The Pteridophyte Phylogeny Group
Pellaea Link, Fil. Spec.: 59. 1841. Lectotype (designated by C.Chr., Index Filic. xxxix. 1906): Pellaea
atropurpurea (L.) Link ( Pteris atropurpurea L.).
Circumscription sensu Tryon et al. (1990) but excluding Ormopteris. Includes: Choristosoria Mett. ex Kuhn;
Paraceterach Copel.; Pellaeopsis J.Sm.; Platyloma J.
Sm.; Pteridella Kuhn. Not monophyletic as circumscribed (Yesilyurt et al., 2015). About 40 species.
Pentagramma Yatsk., Windham & E.Wollenw., Amer.
Fern J. 80(1): 13. 1990. Type: Pentagramma triangularis
(Kaulf.) Yatsk., Windham & E.Wollenw. ( Gymnogramma triangularis Kaulf.). Circumscription sensu
Schuettpelz et al. (2015). Monophyletic (Schuettpelz
et al., 2007). Six species.
ex Christ, Neue Denkschr. Allg.
Trachypteris Andre
Schweiz. Ges. Gesamten Naturwiss. 36: 150. 1899.
ex
Type: Trachypteris aureonitens (Hook.) Andre
Christ ( Acrostichum aureonitens Hook.). Circumscription sensu Ramos-Giacosa et al. (2011). Includes:
Saffordia Maxon. Monophyly not assessed (only one
species sampled; Eiserhardt et al., 2011). Four species.
Suborder Dennstaedtiineae Schwartsb. & Hovenkamp, this
classification (see below). Circumscription equivalent to
family Dennstaedtiaceae in this classification and in Smith
et al. (2006b). Monophyletic (Schuettpelz & Pryer, 2007).
An estimated 265 species.
31. Family Dennstaedtiaceae Lotsy, Vort. Bot. Stammesgesch. 2: 655. 1909. Circumscription sensu Smith et al.
(2006b). Includes: Hypolepidaceae Pic.Serm.; Monachosoraceae Ching; Pteridiaceae Ching. Monophyletic
(Schuettpelz & Pryer, 2007). Ten genera and an
estimated 265 species.
Blotiella R.M.Tryon, Contr. Gray Herb. 191: 96. 1962.
Type: Blotiella glabra (Bory) R.M.Tryon ( Lonchitis
glabra Bory). Circumscription sensu Tryon (1962) and
Kramer (1990d). Monophyletic (Perrie et al., 2015),
although only two species were sampled. Perhaps 20
species.
Dennstaedtia Bernh., J. Bot. (Schrader) 1800(2): 124.
1801. Type: Dennstaedtia flaccida (G.Forst.) Bernh. (
Trichomanes flaccidum G.Forst.). Circumscription
sensu Kramer (1990d). Includes: Adectum Link;
Coptodipteris Nakai & Momose; Costaricia Christ;
Emodiopteris Ching & S.K.Wu; Fuziifilix Kanai &
Momose; Paradennstaedtia Tagawa; Patania C.Presl;
Sitobolium Desv. Not monophyletic as circumscribed;
needs further sampling to include several competing
type species (Perrie et al., 2015). About 70 species.
Histiopteris (J.Agardh) J.Sm., Hist. Fil.: 294: 1875.
Type: Histiopteris vespertilionis (Labill.) J.Sm. ( Pteris
vespertilionis Labill.). Circumscription sensu Kramer
(1990d). Includes: Lepidocaulon Copel. Monophyletic
(Perrie et al., 2015), although only two species were
sampled. About seven species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Hypolepis Bernh., Neues J. Bot. 1(2): 34. 1805. Type:
Hypolepis tenuifolia (G.Forst.) Bernh. ex C.Presl (
Lonchitis tenuifolia G.Forst.). Circumscription sensu
Kramer (1990d) and Schwartsburd & Prado (2015,
2016). Mostly monophyletic (Wolf, 1995; Perrie et al.,
2015), but a few species may need to be transferred to a
different genus (Brownsey, 1983). Perhaps 80 species.
€nigl. Bot. Gart.
Leptolepia Mett. ex Prantl, Arbeiten Ko
Breslau 1: 23. 1892. Lectotype (designated by C.Chr.,
Index Filic. xxviii. 1906): Leptolepia novae-zelandiae
(Colenso) Mett. ex Diels ( Davallia novae-zelandiae
Colenso). Circumscription sensu Kramer (1990d).
Monotypic.
Microlepia C.Presl, Tent. Pterid.: 124, pl. 4, f. 21–23.
1836. Lectotype (designated by J.Sm., Hist. Fil.: 260.
1875): Microlepia polypodioides (Sw.) C.Presl (
Dicksonia polypodioides Sw.). Circumscription sensu
Kramer (1990d). Includes: Scypholepia J.Sm. Monophyletic; sister to the old world clade of Dennstaedtia
(Perrie et al., 2015). About 60 species.
Monachosorum Kunze, Bot. Zeitung (Berlin) 6: 119. 1848.
Type: Monachosorum davallioides Kunze. Circumscription
sensu Kramer (1990m). Includes: Ptilopteris Hance;
Monachosorella Hayata. Monophyletic (Perrie et al.,
2015; Ebihara et al., 2016). About six species.
Oenotrichia Copel., Univ. Calif. Publ. Bot. 16: 82. 1929.
Type: Oenotrichia maxima (E.Fourn.) Copel. (
Leucostegia maxima E.Fourn.). Circumscription sensu
Kramer (1990d). Monophyletic (Perrie et al., 2015).
About two species.
Paesia A.St.-Hil., Voy. Distr. Diam. 1: 381. 1833. Type:
Paesia viscosa A.St.-Hil. Circumscription sensu Kramer
(1990d). Monophyletic (Perrie et al., 2015), although
only two species were sampled. About 15 species.
Pteridium Gled. ex Scop., Fl. Carniol.: 169. 1760. Type:
Pteridium aquilinum (L.) Kuhn ( Pteris aquilina L.).
Circumscription sensu Kramer (1990d), Der et al.
(2009), and Thomson (2012). Includes: Cincinalis Gled.;
Eupteris Newman; Ornithopteris (J.Agardh) J.Sm.;
Filix-foemina Farwell. Monophyletic (Der et al., 2009;
Zhou et al., 2014; Wolf et al., 2015). Species number
uncertain; about 20 morphotypes have been recognized, but molecular evidence points to substantially
fewer species. Four species.
Suborder Aspleniineae H.Schneid. & C.J.Rothf., this classification (see below). Circumscription equivalent to “eupolypods II” in Smith et al. (2006b). Monophyletic (Schuettpelz
& Pryer, 2007; Rothfels et al., 2012a). 11 families, 72 genera,
and an estimated 2775 species.
32. Family Cystopteridaceae Shmakov, Turczaninowia 4: 60.
2001. Circumscription sensu Rothfels et al. (2012b).
Monophyletic (Rothfels et al., 2012a, 2013; Wei & Zhang,
2014). Three genera and an estimated 37 species.
www.jse.ac.cn
PPG I
Acystopteris Nakai, Bot. Mag. (Tokyo) 47: 180. 1933.
Type: Acystopteris japonica (Luerss.) Nakai ( Cystopteris japonica Luerss.). Circumscription sensu
Rothfels et al. (2012b). Monophyletic (Rothfels
et al., 2012a, 2013). At least three species.
Cystopteris Bernh., Neues J. Bot. 1(2): 26. 1805.
Lectotype (designated by J.Sm., Hist. Fil.: 236. 1875):
Cystopteris fragilis (L.) Bernh. ( Polypodium fragile
L.). Circumscription sensu Rothfels et al. (2013) and
Wei & Zhang (2014). Includes: Cystoathyrium Ching;
Rhizomatopteris A.P.Khokhr. Monophyletic (Rothfels
et al., 2012a, 2013; Wei & Zhang, 2014). At least 26
species.
Gymnocarpium Newman, Phytologist 4: 371. 1851.
Lectotype (designated by Ching, Contr. Biol. Lab.
Sci. Soc. China, Bot. Ser. 9: 38. 1933): Gymnocarpium
dryopteris (L.) Newman ( Polypodium dryopteris
L.). Circumscription sensu Sarvela (1978) and
Rothfels et al. (2013). Includes: Currania Copel.
Monophyletic (Rothfels et al., 2012a, 2013). At least
eight species.
33. Family Rhachidosoraceae X.C.Zhang, Phytotaxa 19: 16.
2011. Circumscription sensu Christenhusz et al. (2011)
and Rothfels et al. (2012b). Family consists of a single
genus and an estimated eight species.
Rhachidosorus Ching, Acta Phytotax. Sin. 9(1): 73.
1964. Type: Rhachidorous mesosorus (Makino)
Ching ( Asplenium mesosorum Makino). Circumscription sensu Lindsay et al. (2012). Likely
monophyletic (Li et al., 2011; Rothfels et al.,
2012a). Eight species.
34. Family Diplaziopsidaceae X.C.Zhang & Christenh.,
Phytotaxa 19: 15. 2011. Circumscription sensu Rothfels
et al. (2012b). Likely monophyletic (Kuo et al., 2011;
Rothfels et al., 2012a). Two genera and an estimated
four species.
Diplaziopsis C.Chr., Index Filic. 227. 1905. Type:
Diplaziopsis brunoniana (Wall.) W.M.Chu ( Allantodia
brunoniana Wall.). Circumscription sensu He & Kato
(2013). Likely monophyletic (Li et al., 2011; Wei et al.,
2010; Rothfels et al., 2012a). Three species.
Homalosorus Small ex Pic.Serm., Webbia 31(1): 246.
1977. Type: Homalosorus pynocarpos (Spreng.) Pic.
Serm. ( Asplenium pycnocarpum Spreng.). Circumscription sensu Pichi Sermolli (1977a). Monotypic.
35. Family Desmophlebiaceae Mynssen, A.Vasco, Sylvestre,
R.C.Moran & Rouhan, Taxon 65(1): 19. 2016. Circumscription sensu Mynssen et al. (2016). Family consists of a
single genus and two species.
Desmophlebium Mynssen, A.Vasco, Sylvestre, R.C.
Moran & Rouhan, Taxon 65(1): 19–34. 2016. Type:
Desmophlebium lechleri (Mett.) Mynssen, A.Vasco,
www.jse.ac.cn
19
Sylvestre, R.C.Moran & Rouhan ( Asplenium
lechleri Mett.). Circumscription sensu Mynssen
et al. (2016). Only one species included in a
phylogenetic analysis, but assumed to be monophyletic based on morphological evidence (Mynssen
et al., 2016). Two species.
36. Family Hemidictyaceae Christenh. & H.Schneid., Phytotaxa 28: 51. 2011. Circumscription sensu Rothfels et al.
(2012b) and Christenhusz & Schneider (2011). Family
consists of a single monotypic genus.
Hemidictyum C.Presl, Tent. Pterid.: 110, t.3, f.24–26.
1836. Lectotype (designated by J.Sm., Hist. Fil.: 335.
1875): Hemidictyum marginatum (L.) C.Presl (
Asplenium marginatum L.). Circumscription sensu
Kramer et al. (1990). Monotypic.
37. Family Aspleniaceae Newman, Hist. Brit. Ferns: 6. 1840.
Circumscription sensu Smith et al. (2006b) and Rothfels
et al. (2012b). Monophyletic (Schneider et al., 2004a;
Schneider et al., 2005). Two genera and an estimated 730
species.
Asplenium L., Sp. Pl. 2: 1078. 1753. Lectotype
(designated by J.Sm., Hist. Fil.: 316. 1875): Asplenium
marinum L. Circumscription sensu Schneider et al.
(2004a). Includes: Antigramma C.Presl; Camptosorus
Link; Ceterach Willd.; Ceterachopsis (J.Sm.) Ching;
Diellia Brack.; Diplora Baker; Holodictyum Maxon;
Loxoscaphe T.Moore; Phyllitis Hill; Pleurosorus F
ee;
Schaffneria F
ee ex T.Moore; Scolopendrium Adans.;
Sinephropteris Mickel. Monophyletic (Schneider
et al., 2004a). At least 700 species.
Hymenasplenium Hayata, Bot. Mag. (Tokyo) 41
(492): 712. 1927. Type: Hymenasplenium unilaterale
(Lam.) Hayata ( Asplenium unilaterale Lam.).
Circumscription sensu Schneider et al. (2004a).
Monophyletic (Schneider et al., 2004a). At least 30
species.
38. Family Woodsiaceae Herter, Revista Sudamer. Bot. 9: 14.
1949. Circumscription sensu Christenhusz et al. (2011)
and Rothfels et al. (2012b). Family consists of a single
genus and an estimated 39 species.
Woodsia R.Br., Prodr.: 158, Obs. 4. 1810. Lectotype
(designated by J.Sm., Hist. Fil.: 237. 1875): Woodsia
ilvensis (L.) R.Br. ( Acrostichum ilvense L.). Circumscription sensu Shao et al. (2015). Includes: Eriosoriopsis (Kitag.) Ching & S.H.Wu; Cheilanthopsis Hieron.;
Hymenocystis C.A.Mey; Physematium Kaulf.; Protowoodsia Ching; Woodsiopsis Shmakov. Monophyletic
(Rothfels et al., 2012a; Shao et al., 2015; Shmakov,
2015). 39 species.
39. Family Onocleaceae Pic.Serm., Webbia 24: 708. 1970.
Circumscription sensu Smith et al. (2006b). Monophyletic (Gastony & Ungerer, 1997; Rothfels et al., 2012a).
Four genera and an estimated five species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
20
The Pteridophyte Phylogeny Group
Matteuccia Tod., Giorn. Sci. Nat. Econ. Palermo 1(3–4):
235. 1866. Type: Matteuccia struthiopteris (L.) Tod. (
Osmunda struthiopteris L.). Circumscription sensu
Gastony & Ungerer (1997) and Rothfels et al. (2012b).
Monotypic, although American and European populations could be treated as distinct species (Koenemann et al., 2011).
Telmatoblechnum Perrie, D.J.Ohlsen & Brownsey,
Taxon 63(4). 755. 2014. Type: Telmatoblechnum
serrulatum (Rich.) Perrie, D.J.Ohlsen & Brownsey (
Blechnum serrulatum Rich.). Circumscription sensu
Perrie et al. (2014) and Gasper et al. (2016b).
Monophyletic (Perrie et al., 2014; Gasper et al.,
2016a). Two species.
Onoclea L., Sp. Pl. 2: 1062. 1753. Type: Onoclea sensibilis
L. Circumscription sensu Gastony & Ungerer (1997) and
Rothfels et al. (2012b). Includes: Pterinodes Siegesb. ex
Kuntze; Calypterium Bernh.; Ragiopteris C.Presl; Riedlea
Mirb. Monotypic (Gastony & Ungerer, 1997).
Subfamily Woodwardioideae Gasper, V.A.O.Dittrich &
Salino, Phytotaxa 275(3): 197. 2016. Circumscription
sensu Gasper et al. (2016b). Monophyletic (Cranfill &
Kato, 2003; Perrie et al., 2014; Gasper et al., 2016a).
Three genera and an estimated 15 species.
Onocleopsis F.Ballard, Amer. Fern J. 35: 1. 1945. Type:
Onocleopsis hintonii F.Ballard. Circumscription sensu
Gastony & Ungerer (1997) and Rothfels et al. (2012b).
Monotypic.
Anchistea C.Presl, Epimel. Bot.: 71. 1851. Type:
Anchistea virginica (L.) C.Presl ( Blechnum virginicum
L.). Circumscription sensu Gasper et al. (2016b).
Monotypic (Gasper et al., 2016a).
Pentarhizidium Hayata, Bot. Mag. (Tokyo) 42: 345.
1928. Type: Pentarhizidium japonicum Hayata. Circumscription sensu Gastony & Ungerer (1997) and
Rothfels et al. (2012b). Monophyletic (Gastony &
Ungerer, 1997; Rothfels et al., 2012a). The name
Pentarhizidium was first used in 1927, in the context of
describing the morphological distinctiveness of the P.
orientale stele (Hayata, 1927). However, the paper
lacked a description of the genus itself and we
consider Pentarhizidium and P. orientale as nomina
nuda until the genus was formally described and a
type (P. japonicum) was designated (Hayata, 1928).
Two species.
Lorinseria C.Presl, Epimel. Bot.: 72. 1851. Lectotype
(designated by J.Sm., Hist. Fil.: 310. 1875): Lorinseria
areolata (L.) C.Presl ( Acrostichum areolatum L.).
Circumscription sensu Gasper et al. (2016b). Lorinseria
C.Presl appears to be a later homonym of Lorinsera
Opiz, and will therefore most likely require a new name
(or conservation). Monotypic (Gasper et al., 2016a).
m. Acad. Roy. Sci. Turin 5. 411.
Woodwardia Sm., Me
1793. Lectotype (designated by J.Sm., Hist. Fil.: 310.
1875): Woodwardia radicans (L.) Sm. ( Blechnum
radicans L.). Circumscription sensu Gasper et al.
(2016b). Includes: Chieniopteris Ching. Monophyletic
(Gasper et al., 2016a). 13 species.
40. Family Blechnaceae Newman, Hist. Brit. Ferns (ed. 2): 8.
1844. Circumscription sensu Smith et al. (2006b).
Monophyletic (Schuettpelz & Pryer 2007; Rothfels
et al., 2012a; Gasper et al., 2016a). Three subfamilies,
24 genera, and an estimated 265 species.
Subfamily Blechnoideae Gasper, V.A.O.Dittrich & Salino,
Phytotaxa 275(3): 201. 2016. Circumscription sensu
Gasper et al. (2016b). Monophyletic (Gasper et al.,
2016a). 18 genera and an estimated 238 species.
Subfamily Stenochlaenoideae (Ching) J.P.Roux, Conspect. South. Afr. Pteridophyta: 156. 2001. Circumscription sensu Roux (2001) emend. Gasper et al. (2016b).
Monophyletic (Gasper et al., 2016a). Three genera and
an estimated 12 species.
Austroblechnum Gasper & V.A.O.Dittrich, Phytotaxa 275
(3): 202. 2016. Type: Austroblechnum penna-marina
(Poir.) Gasper & V.A.O.Dittrich ( Polypodium pennamarina Poir.). Circumscription sensu Gasper et al.
(2016b). Monophyletic (Gasper et al., 2016a). 40 species.
Salpichlaena J.Sm., Gen. Fil. pl. 93. 1842. Type:
Salpichlaena volubilis (Kaulf.) J.Sm. ( Blechnum
volubile Kaulf.). Circumscription sensu Perrie et al.
(2014) and Gasper et al. (2016b). Monophyletic
(Gasper et al., 2016a). Three species.
Blechnidium T.Moore, Index Fil. clv. 1860; Brit. Ferns:
210. 1860. Type: Blechnidium melanopus (Hook.) T.
Moore ( Blechnum melanopus Hook.). Circumscription sensu Gasper et al. (2016b). Monotypic (Gasper
et al., 2016a).
Stenochlaena J.Sm., J. Bot. (Hooker) 3: 401. 1841.
Lectotype (designated by Pfeiffer, Nom. 2: 1274.
1874): Stenochlaena palustris (Burm.f.) Bedd. (
Polypodium palustre Burm.f.). Circumscription sensu
Perrie et al. (2014) and Gasper et al. (2016b).
Monophyletic (Gasper et al., 2016a). We follow
Copeland (1947) in identifying the name Acrostichum
scandens L. (referred to in both the description of the
genus and its lectotypification) with Stenochlaena
palustris (Burm.f.) Bedd. Seven species.
Blechnopsis C.Presl, Epimel. Bot.: 115. 1851. Lectotype
(designated by Pic.Serm., Webbia 28: 456. 1973):
Blechnopsis orientalis (L.) C.Presl ( Blechnum orientale L.). Circumscription sensu Gasper et al. (2016b).
Monophyletic (Gasper et al., 2016a). Two species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Blechnum L., Sp. Pl. 2: 1077. 1753. Lectotype (designated
by J.Sm., Hist. Fil.: 300. 1875): Blechnum occidentale L.
Circumscription sensu Gasper et al. (2016b). Monophyletic (Gasper et al., 2016a). 30 species.
www.jse.ac.cn
PPG I
Brainea J.Sm., Cat. Kew Ferns: 5. 1856. Type: Brainea
insignis (Hook.) J.Sm. ( Bowringia insignis Hook.).
Circumscription sensu Gasper et al. (2016b). Monotypic (Gasper et al., 2016a).
Cleistoblechnum Gasper & Salino, Phytotaxa 275(3):
207. 2016. Type: Cleistoblechnum eburneum (Christ)
Gasper & Salino ( Blechnum eburneum Christ).
Circumscription sensu Gasper et al. (2016b). Monotypic (Gasper et al., 2016a).
Cranfillia Gasper & V.A.O.Dittrich, Phytotaxa 275(3):
207. 2016. Type: Cranfillia fluviatilis (R.Br.) Gasper
& V.A.O.Dittrich ( Stegania fluviatilis R.Br.). Circumscription sensu Gasper et al. (2016b). Monophyletic
(Gasper et al., 2016a). 11 species.
Diploblechnum Hayata, Bot. Mag. (Tokyo) 41. 702.
1927. Type: Diploblechnum integripinnulum Hayata.
Circumscription sensu Gasper et al. (2016b). Includes:
Pteridoblechnum Hennipman and Steenisioblechnum
Hennipman. Monophyletic (Gasper et al., 2016a). Six
species.
Doodia R.Br., Prodr. Fl. Nov. Holl.: 151. 1810. Lectotype
(designated by J.Sm., Hist. Fil.: 309. 1875): Doodia
aspera R.Br. Circumscription sensu Gasper et al.
(2016b). Monophyletic (Gasper et al., 2016a). 19
species.
Icarus Gasper & Salino, Phytotaxa 275(3): 209. 2016.
Type: Icarus filiformis (A.Cunn.) Gasper & Salino (
Lomaria filiformis A.Cunn.). Circumscription sensu
Gasper et al. (2016b). Monotypic (Gasper et al.,
2016a).
Lomaria Willd., Mag. Neuesten Entdeck. Gesammten
Naturk. Ges. Naturf. Freunde Berlin 3: 160. 1809.
Lectotype (designated by J.Sm., Hist. Fil.: 303. 1875):
Lomaria nuda (Labill.) Willd. ( Onoclea nuda Labill.).
Circumscription sensu Gasper et al. (2016b). Includes:
Stegania R.Br. Monophyletic (Gasper et al., 2016a). Six
species.
Lomaridium C.Presl, Epimel. Bot.: 154. 1851. Lectotype
(designated by C.Chr., Index Filic. xxxv. 1906): Lomaridium plumieri (Desv.) C.Presl ( Lomaria plumieri
Desv.). Circumscription sensu Gasper et al. (2016b).
Monophyletic (Gasper et al., 2016a). 16 species.
Lomariocycas (J.Sm.) Gasper & A.R.Sm., Phytotaxa
275(3): 212. 2016. Type: Lomaria boryana (Sw.) Willd.
( Onoclea boryana Sw.). Circumscription sensu
Gasper et al. (2016b). Monophyletic (Gasper et al.,
2016a). 19 species.
Neoblechnum Gasper & V.A.O.Dittrich, Phytotaxa 275
(3): 214. 2016. Type: Neoblechnum brasiliense (Desv.)
Gasper & V.A.O.Dittrich ( Blechnum brasiliense
Desv.). Circumscription sensu Gasper et al. (2016b).
Monotypic (Gasper et al., 2016a).
www.jse.ac.cn
21
Oceaniopteris Gasper & Salino, Phytotaxa 275(3): 214.
2016. Type: Oceaniopteris gibba (Labill.) Gasper &
Salino ( Lomaria gibba Labill.). Circumscription
sensu Gasper et al. (2016b). Monophyletic (Gasper
et al., 2016a). Eight species.
Parablechnum C.Presl, Epimel. Bot.: 109. 1851. Lectotype (designated by F
ee, M
em. Foug., 5. Gen. Filic.: 82.
1852): Parablechnum procerum (G.Forst.) C.Presl (
Osmunda procera G.Forst.). Circumscription sensu
Gasper et al. (2016b). Monophyletic (Gasper et al.,
2016a). 65 species.
Sadleria Kaulf., Enum. Filic.: 161. 1824. Type: Sadleria
cyatheoides Kaulf. Circumscription sensu Perrie et al.
(2014) and Gasper et al. (2016b). Monophyletic
(Gasper et al., 2016a). Six species.
Struthiopteris Scop., Fl. Carn.: 168. 1760. Lectotype
(designated by Weis, Pl. Crypt. Fl. Gott.: 286. 1770):
Struthiopteris spicant (L.) Weis ( Lomaria spicant L.).
Circumscription sensu Gasper et al. (2016b). Includes:
Spicantopsis Nakai. Monophyletic (Gasper et al.,
2016a). Five species.
41. Family Athyriaceae Alston, Taxon 5: 25. 1956. Circumscription sensu Rothfels et al. (2012b). Monophyletic (Rothfels
et al., 2012a). Three genera and an estimated 650 species.
Athyrium Roth, Tent. Fl. Germ. 3(1): 31. 1800. Lectotype
(designated by J.Sm., Hist. Fil.: 327. 1875): Athyrium filixfemina (L.) Roth ( Polypodium filix-femina L.).
Circumscription equivalent to “athyriids“ in Rothfels
et al. (2012b). Includes: Anisocampium C.Presl; Kuniwatsukia Pic.Serm.; Pseudocystopteris Ching; Neoathyrium Ching & Z.R.Wang; Cornoathyrium Nakaike;
Cornopteris Nakai. Monophyletic (Adjie et al., 2008;
Rothfels et al., 2012a). About 230 species.
Deparia Hook. & Grev., Icon. Filic. 2(8): pl.154. 1830.
Type: Deparia macraei Hook. & Grev. Circumscription
sensu Kuo et al. (2016b). Includes: Depazium
Nakaike; Lunathyrium Koidz.; Dryoathyrium Ching;
Parathyrium Holttum; Athyriopsis Ching; Dictyodroma
Ching; Triblemma (J.Sm.) Ching. Monophyletic (Kuo
et al., 2016b). About 70 species.
Diplazium Sw., J. Bot. (Schrader) 1800(2): 4, 61. 1801.
Lectotype (designated by J.Sm., Hist. Fil.: 325. 1875):
Diplazium plantaginifolium (L.) Urb. ( Asplenium
plantaginifolium L.). Circumscription sensu Wei et al.
(2013). Includes: Allantodia R.Br.; Anisogonium C.Presl;
Callipteris Bory; Monomelangium Hayata. Monophyletic (Wei et al., 2013, 2015). About 350 species.
42. Family Thelypteridaceae Ching ex Pic.Serm., Webbia 24:
709. 1970. Circumscription sensu Smith & Cranfill (2002),
He & Zhang (2012), and Almeida et al. (2016).
Monophyletic (Smith & Cranfill, 2002; Rothfels et al.,
2012a; Almeida et al., 2016). Two subfamilies, 30 genera,
and an estimated 1034 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
22
The Pteridophyte Phylogeny Group
Subfamily Phegopteridoideae Salino, A.R.Sm. & T.E.
Almeida, this classification (see below). Circumscription sensu Smith & Cranfill (2002), He & Zhang (2012),
and Almeida et al. (2016). Monophyletic (Smith &
Cranfill, 2002; He & Zhang, 2012; Rothfels et al., 2012a;
Almeida et al., 2016). Three genera and an estimated
34 species.
Macrothelypteris (H.Ito) Ching, Acta Phytotax. Sin. 8
(4): 308. 1963. Type: Macrothelypteris oligophlebia
(Baker) Ching ( Nephrodium oligophlebium Baker).
Circumscription sensu Almeida et al. (2016). Monophyletic (Smith & Cranfill, 2002; He & Zhang, 2012;
Almeida et al., 2016). 10 species.
e, Me
m. Foug., 5. Gen. Filic.: 242.
Phegopteris (C.Presl) Fe
1852. Lectotype (designated by Ching, Acta Phytotax.
e (
Sin. 8(4): 312. 1963): Phegopteris polypodioides Fe
Polypodium phegopteris L.). Circumscription sensu
Almeida et al. (2016). Monophyletic (Smith & Cranfill,
2002; He & Zhang, 2012; Almeida et al., 2016). For
discussion of the authority and typification, see McNeill
and Pryer (1985). Four species.
Pseudophegopteris Ching, Acta Phytotax. Sin. 8(4):
313. 1963. Type: Pseudophegopteris pyrrhorachis
(Kunze) Ching ( Polypodium pyrrhorachis Kunze).
Circumscription sensu Almeida et al. (2016). Monophyletic (Smith & Cranfill, 2002; He & Zhang, 2012;
Almeida et al., 2016). 20 species.
Subfamily Thelypteridoideae C.F.Reed, Phytologia 17:
254. 1968. Circumscription sensu Smith & Cranfill (2002),
He & Zhang (2012), and Almeida et al. (2016).
Monophyletic (Smith & Cranfill, 2002; He & Zhang,
2012; Almeida et al., 2016). 27 genera and an estimated
1000 species.
Amauropelta Kunze, Farrnkr€auter 1: 86. 1843. Type:
Amauropelta breutelii Kunze. Circumscription sensu
Almeida et al. (2016). Monophyletic (Smith & Cranfill,
2002; Almeida et al., 2016). About 215 species.
Amblovenatum J.P.Roux, Strelitzia 23: 200. 2009.
Replacement name for Amphineuron Holttum non
Amphineurion (A.DC.) Pichon. Type: Amblovenatum
opulentum (Kaulf.) J.P.Roux ( Aspidium opulentum
Kaulf.). Circumscription sensu Almeida et al. (2016).
Monophyletic (He & Zhang, 2012; Almeida et al., 2016).
12 species.
Ampelopteris Kunze, Bot. Zeitung (Berlin) 6: 114. 1848.
Type: Ampelopteris elegans Kunze. Circumscription
sensu Almeida et al. (2016). Monotypic (He & Zhang,
2012; Almeida et al., 2016).
Chingia Holttum, Blumea 19(1): 31. 1971. Type: Chingia
ferox (Blume) Holttum ( Aspidium ferox Blume).
Circumscription sensu Almeida et al. (2016). Monophyletic (Smith & Cranfill, 2002; He & Zhang, 2012;
Almeida et al., 2016). 20 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Christella H.L
ev., Fl. Kouy-Tch
eou 472. 1915. Lectotype
(designated by Holttum, Taxon 20: 534. 1971):
Christella parasitica (L.) H.Lev. ( Polypodium parasiticum L.). Circumscription sensu Almeida et al.
(2016). Not monophyletic as circumscribed (Almeida
et al., 2016). Perhaps 70 species.
Coryphopteris Holttum, Blumea 19(1): 33. 1971. Type:
Coryphopteris viscosa (Baker) Holttum ( Nephrodium viscosum Baker). Circumscription sensu Almeida
et al. (2016). Includes: Parathelypteris Ching (pro
parte). Monophyletic (Smith & Cranfill, 2002; Almeida
et al., 2016). 47 species.
Cyclogramma Tagawa, Acta Phytotax. Geobot. 7(1):
52. 1938. Type: Cyclogramma simulans (Ching) Tagawa
( Thelypteris simulans Ching). Circumscription sensu
Almeida et al. (2016). Presumably monophyletic (He &
Zhang, 2012; Almeida et al., 2016). Eight species.
Cyclosorus Link, Hort. Berol. 2: 128. 1833. Type:
Cyclosorus gongylodes (Schkuhr) Link ( Aspidium
gongylodes Schkuhr). Circumscription sensu Almeida
et al. (2016). Monophyletic (Almeida et al., 2016). Two
species.
Glaphyropteridopsis Ching, Acta Phytotax. Sin. 8(4):
320. 1963. Type: Glaphyropteridopsis erubescens (Wall.
ex Hook.) Ching ( Polypodium erubescens Wall. ex
Hook.). Circumscription sensu Holttum (1971). Presumably monophyletic (Almeida et al., 2016). Four species.
Goniopteris C.Presl, Tent. Pterid.: 181, pl.7, f.9–11. 1836.
Lectotype (designated by J.Sm., Hist. Fil.: 191. 1875):
Goniopteris crenata (Sw.) C.Presl ( Polypodium
crenatum Sw.). Circumscription sensu Almeida et al.
(2016). Monophyletic (Smith & Cranfill, 2002; He &
Zhang, 2012; Almeida et al., 2016). About 120 species.
Meniscium Schreb., Gen. Pl. ed. 8(a) 2: 757. 1791. Type:
Meniscium reticulatum (L.) Sw. ( Polypodium
reticulatum L.). Circumscription sensu Almeida et al.
(2016). Monophyletic (Smith & Cranfill, 2002; He &
Zhang, 2012; Almeida et al., 2016). 27 species.
r. 2. 30: 20. 1956.
Menisorus Alston, Bol. Soc. Brot., se
Type: Menisorus pauciflorus (Hook.) Alston ( Meniscium pauciflorum Hook.). Circumscription sensu
Holttum (1974a). Not yet included in a phylogenetic
study. Monotypic.
Mesophlebion Holttum, Blumea 19(1): 29. 1971. Type:
Mesophlebion crassifolium (Blume) Holttum ( Aspidium crassifolium Blume). Circumscription sensu
Holttum (1975). Monophyly uncertain (only one
species sampled; Almeida et al., 2016). 15 species.
Mesopteris Ching, Acta Phytotax. Sin. 16(4): 21. 1978.
Type: Mesopteris tonkinensis (C.Chr.) Ching (
Dryopteris tonkinensis C.Chr.). Circumscription sensu
Lin et al. (2013). Monotypic.
www.jse.ac.cn
PPG I
Metathelypteris (H.Ito) Ching, Acta Phytotax. Sin. 8
(4): 305. 1963. Type: Metathelypteris gracilescens
(Blume) Ching ( Aspidium gracilescens Blume).
Circumscription sensu Almeida et al. (2016). Monophyletic (Smith & Cranfill, 2002; He & Zhang, 2012;
Almeida et al., 2016). 12 species.
Nannothelypteris Holttum, Blumea 19(1): 38. 1971.
Type: Nannothelypteris aoristisora (Harr.) Holttum (
Polypodium aoristisorum Harr.). Circumscription sensu
Holttum (1971). Monophyly uncertain (only one species
sampled; Almeida et al., 2016). Three species.
Oreopteris Holub, Folia Geobot. Phytotax. 4(1): 46.
1969. Type: Oreopteris limbosperma (All.) Holub (
Polypodium limbospermum All.). Circumscription
sensu Almeida et al. (2016). Monophyletic (Smith &
Cranfill, 2002; He & Zhang, 2012; Almeida et al., 2016).
Three species.
Parathelypteris (H.Ito) Ching, Acta Phytotax. Sin. 8: 300.
1963. Type: Parathelypteris glanduligera (Kunze) Ching
( Aspidium glanduligerum Kunze). Circumscription
sensu Holttum (1971). Not monophyletic as currently
circumscribed (Almeida et al., 2016). About 15 species.
Plesioneuron (Holttum) Holttum, Blumea 22: 232.
1975. Type: Plesioneuron tuberculatum (Ces.) Holttum
( Nephrodium tuberculatum Ces.). Circumscription
sensu Holttum (1975). Monophyly uncertain (only one
species sampled; Almeida et al., 2016). 30 species.
Pneumatopteris Nakai, Bot. Mag. (Tokyo) 47: 179.
1933. Type: Pneumatopteris callosa (Blume) Nakai (
Aspidium callosum Blume). Circumscription sensu
Holttum (1971). Monophyly uncertain (only two
species sampled; He & Zhang, 2012; Almeida et al.,
2016). About 80 species.
Pronephrium C.Presl, Epimel. Bot.: 258. 1851. Lectotype (designated by Holttum, Novit. Bot. 1968: 48):
Pronephrium lineatum (Blume) C.Presl ( Aspidium
lineatum Blume). Circumscription sensu Holttum
e; Dimorphopteris
(1971). Includes: Abacopteris Fe
Tagawa & K.Iwats. Not monophyletic as circumscribed (Almeida et al., 2016). 68 species.
Pseudocyclosorus Ching, Acta Phytotax. Sin. 8(4): 322.
1963. Type: Pseudocyclosorus tylodes (Kunze) Ching
( Aspidium tylodes Kunze). Circumscription sensu
Holttum & Grimes (1980). Not monophyletic as
circumscribed (Almeida et al., 2016). 11 species.
Sphaerostephanos J.Sm., Gen. Fil. (Hooker): pl.24. 1840.
Type: Sphaerostephanos asplenioides J.Sm. Circumscription sensu Holttum (1971). Not monophyletic as
circumscribed (Almeida et al., 2016). About 185 species.
Stegnogramma Blume, Enum. Pl. Javae 2: 172. 1828. Type:
Stegnogramma aspidioides Blume. Circumscription sensu
Almeida et al. (2016). Includes: Dictyocline T.Moore;
www.jse.ac.cn
23
Leptogramma J.Sm. Monophyletic (Smith & Cranfill,
2002; He & Zhang, 2012; Almeida et al., 2016). 18 species.
Steiropteris (C.Chr.) Pic.Serm., Webbia 28: 449. 1973.
Lectotype (designated by C.Chr., Kongel. Danske
Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 7,
1913: 164): Steiropteris deltoidea (Sw.) Pic.Serm. (
Polypodium deltoideum Sw.). Circumscription sensu
e.
Almeida et al. (2016). Includes: Glaphyropteris Fe
Monophyletic (Smith & Cranfill, 2002; He & Zhang,
2012; Almeida et al., 2016). 22 species.
Thelypteris Schmidel, Icon. Pl. 3: 45–48, pl.11, 13. 1763.
Type: Thelypteris palustris Schott ( Acrostichum
thelypteris L.). Circumscription sensu Almeida et al.
(2016). Monophyletic (Smith & Cranfill, 2002; He &
Zhang, 2012; Almeida et al., 2016). Two species.
Trigonospora Holttum, Blumea 19(1): 29. 1971. Type:
Trigonospora ciliata (Benth.) Holttum ( Aspidium
ciliatum Benth.). Circumscription sensu Holttum &
Grimes (1980). Monophyly uncertain (only one
species sampled; Almeida et al., 2016). Eight species.
Suborder Polypodiineae Dumort., Anal. Fam. Pl.: 67. 1829.
Circumscription equivalent to “eupolypods I“ in Smith et al.
(2006b). Monophyletic (Schuettpelz & Pryer, 2007; Rothfels
et al., 2015). Nine families, 108 genera, and an estimated
4208 species.
43. Family Didymochlaenaceae Ching ex Li Bing Zhang &
Liang Zhang, Taxon 64(1): 34. 2015. Circumscription
sensu Zhang & Zhang (2015). Family consists of a single
monotypic genus.
Didymochlaena Desv., Mag. Neuesten Entdeck. Gesammten Naturk. Ges. Naturf. Freunde Berlin 5: 303.
1811. Type: Didymochlaena sinuosa Desv. Circumscription sensu Zhang & Zhang (2015). Monotypic, although
undescribed species may exist.
44. Family Hypodematiaceae Ching, Acta Phytotax. Sin. 13
(1): 96. 1975. Circumscription sensu Zhang & Zhang
(2015). Monophyletic (Zhang & Zhang, 2015). Two
genera and an estimated 22 species.
Hypodematium Kunze, Flora 16(2): 690. 1833. Type:
Hypodematium onustum Kunze. Circumscription sensu
Kramer et al. (1990). Monophyletic (Zhang & Zhang,
2015). About 20 species.
Leucostegia C.Presl, Tent. Pterid.: 94, pl.4, f.11. 1836.
Type: Leucostegia immersa C.Presl. Circumscription
sensu Kramer (1990c). Monophyletic (Zhang & Zhang,
2015). Two species.
45. Family Dryopteridaceae Herter, Revista Sudamer. Bot. 9
(1): 15. 1949. Circumscription sensu Liu et al. (2016).
Monophyletic (Liu et al., 2016). Three subfamilies, 26
genera, and an estimated 2115 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
24
The Pteridophyte Phylogeny Group
Subfamily Polybotryoideae H.M.Liu & X.C.Zhang, Pl. Syst.
Evol. 302: 330. 2016. Circumscription sensu Liu et al.
(2016). Monophyletic (Moran & Labiak, 2015; Liu et al.,
2016). Seven genera and an estimated 98 species.
Cyclodium C.Presl, Tent. Pterid.: 85, pl.2, f.20–21. 1836.
Lectotype (designated by C.Chr., Index Filic. xxv.
1906): Cyclodium meniscioides (Willd.) C.Presl (
Aspidium meniscioides Willd.). Circumscription sensu
Smith (1986) and Moran & Labiak (2015). Monophyletic (Moran & Labiak, 2015). About 10 species.
Maxonia C.Chr., Smithsonian Misc. Collect. 66(9): 3. 1916.
Type: Maxonia apiifolia (Sw.) C.Chr. ( Dicksonia apiifolia
Sw.). Circumscription sensu Christensen (1916) and Moran
& Labiak (2015). Monotypic (Prado & Moran, 2016).
Olfersia Raddi, Opusc. Sci. 3: 283, t.11, f.b. 1819. Type:
Olfersia corcovadensis Kaulf. ex Raddi. Circumscription
sensu Moran (1986) and Moran & Labiak (2015).
Monophyletic (Moran & Labiak, 2015). Three species.
Polybotrya Humb. & Bonpl. ex Willd., Sp. Pl. 5(1): 99.
1810. Type: Polybotrya osmundacea Humb. & Bonpl. ex
Willd. Circumscription sensu Moran (1987) and Moran
& Labiak (2015). Monophyletic (Moran & Labiak, 2015).
35 species.
Polystichopsis (J.Sm.) C.Chr., Verdoorn, Man. Pterid.:
543. 1938. Lectotype (designated by C.Chr., Index Filic.
Suppl. 3, 7. 1934): Polystichopsis pubescens (L.) C.V.
Morton ( Polypodium pubescens L.). Circumscription
sensu Moran & Labiak (2015) and Prado & Moran
(2016). Monophyletic (Moran & Labiak, 2015). Eight
species.
Stigmatopteris C.Chr., Bot. Tidsskr. 29: 292. 1909. Type:
Stigmatopteris rotundata (Willd.) C.Chr. ( Aspidium
rotundatum Willd.). Circumscription sensu Moran
(1991) and Moran & Labiak (2015, 2016). Monophyletic
(Moran & Labiak, 2016). 40 species.
Trichoneuron Ching, Acta Phytotax. Sin. 10(2): 118, pl.
22. 1965. Type: Trichoneuron microlepioides Ching.
Circumscription sensu Liu et al. (2016). Monotypic (Liu
et al., 2016).
Subfamily Elaphoglossoideae (Pic.Serm.) Crabbe, Jermy
& Mickel, Fern Gaz. 11: 154. 1975. Circumscription sensu
Zhang et al. (2013b) and Liu et al. (2016). Monophyletic
(Liu et al., 2016). 11 genera and an estimated 883 species.
Arthrobotrya J.Sm., Hist. Fil.: 141. 1875. Type: Arthroe) J.Sm. ( Polybotrya articulata
botrya articulata (Fe
e). Circumscription sensu Moran et al. (2010a).
Fe
Monophyletic (Labiak et al., 2014). Two species.
Bolbitis Schott, Gen. Fil.: pl.14. 1834. Lectotype
(designated by C.Chr., Index Filic. xxvi. 1906): Bolbitis
serratifolia (Mert. ex Kaulf.) Schott ( Acrostichum
serratifolium Mert. ex Kaulf.). Circumscription sensu
J. Syst. Evol. 9999 (9999): 1–40, 2016
Moran et al. (2010a). Includes: Campium C.Presl;
Cyrtogonium J.Sm.; Edanyoa Copel.; Egenolfia Schott;
Heteroneuron F
ee; Jenkinsia Hook.; Poecilopteris C.
Presl. Monophyletic (Moran et al., 2010a, 2010b).
About 80 species.
Elaphoglossum Schott ex J.Sm., J. Bot. (Hooker) 4:
148. 1842. Lectotype (designated by J.Sm., Hist. Fil.:
125. 1875): Elaphoglossum conforme (Sw.) J.Sm. (
Acrostichum conforme Sw.). Circumscription sensu
Moran et al. (2010a). Includes: Aconiopteris C.Presl;
e; Microstaphyla
Dictyoglossum Sm.; Hymenodium Fe
e.
C.Presl; Peltapteris Link; Rhipidopteris Schott ex Fe
riga et al.,
Monophyletic (Rouhan et al., 2004; Lo
2014). About 600 species.
Lastreopsis Ching, Bull. Fan Mem. Inst. Biol. Bot. 8(4):
157. 1938. Type: Lastreopsis recedens (J.Sm. ex T.
Moore) Ching ( Lastrea recedens J.Sm. ex T.Moore).
Circumscription sensu Tindale (1965) and Labiak et al.
(2014, 2015b). Includes: Coveniella Tindale. See also
Labiak et al. (2015b). Monophyletic (Labiak et al.,
2014). 16 species.
Lomagramma J.Sm., J. Bot. (Hooker) 3: 402. 1841.
Type: Lomagramma pteroides J.Sm. Circumscription
e.
sensu Moran et al. (2010a). Includes: Cheilolepton Fe
Monophyletic (Moran et al., 2010a). 15 species.
Megalastrum Holttum, Gard. Bull. Singapore 39(2):
161. 1986. Type: Megalastrum villosum (L.) Holttum (
Polypodium villosum L.). Circumscription sensu Holttum (1986) and Liu et al. (2016). Monophyletic (Labiak
et al., 2014). 91 species.
Mickelia R.C.Moran, Labiak & Sundue, Brittonia 62(4):
338. 2010. Type: Mickelia nicotianifolia (Sw.) R.C.
Moran, Labiak & Sundue ( Acrostichum nicotianifolium Sw.). Circumscription sensu Moran et al. (2010a,
2010b). Monophyletic (Moran et al., 2010b). 10
species.
Parapolystichum (Keyserl.) Ching, Sunyatsenia 5: 239.
1940. Type: Parapolystichum effusum (Sw.) Ching (
Polypodium effusum Sw.). Circumscription sensu
Labiak et al. (2014, 2015b). Monophyletic (Labiak
et al., 2014). See also Labiak et al. (2015b) and Sundue
& Testo (2016). 28 species.
Pleocnemia C.Presl, Tent. Pterid.: 183, pl.7, f.12. 1836.
Type: Pleocnemia leuzeana (Gaudich.) C.Presl (
Polypodium leuzeanum Gaudich.). Circumscription
sensu Holttum (1974b) and Liu et al. (2016).
Monophyletic (Labiak et al., 2014). 20 species.
Rumohra Raddi, Opusc. Sci. 3: 290. 1819. Type:
Rumohra aspidioides Raddi ( Polypodium adiantiforme G.Forst.). Circumscription sensu Rakotondrainibe (2010), Sundue et al. (2013), and Labiak et al.
(2014). Monophyletic (Labiak et al., 2014). Eight
species.
www.jse.ac.cn
PPG I
Teratophyllum Mett. ex Kuhn, Ann Mus. Bot.
Lugduno-Batavi 4(10): 296. 1869. Lectotype (designated by Holttum, Gard. Bull. Straits Settlem. 5: 277.
1932): Teratophyllum aculeatum (Blume) Mett. ex
Kuhn ( Lomaria aculeata Blume). Circumscription
sensu Moran et al. (2010a). Monophyletic (Moran
et al., 2010a). 13 species.
Subfamily Dryopteridoideae Link, Fil. Spec.: 116. 1841
(Dryopterideae). Circumscription sensu Liu et al. (2016).
Monophyletic (Liu et al., 2016). Six genera and an
estimated 1128 species.
Arachniodes Blume, Enum. Pl. Javae 2: 241. 1828. Type:
Arachniodes aspidioides Blume. Circumscription sensu
He et al. (2013) and Liu et al. (2016). Includes:
Byrsopteris C.V.Morton; Leptorumohra (H.Ito) H.Ito;
Lithostegia Ching; Phanerophlebiopsis Ching. Assumed to be monophyletic (Liu et al., 2016). 60
species.
Ctenitis (C.Chr.) C.Chr., Man. Pteridol.: 544. 1938.
Lectotype (designated by Ching, Bull. Fan Mem.
Inst. Biol. Bot. 8(5): 275. 1938): Ctenitis distans
(Brack.) Ching ( Lastrea distans Brack.). Circumscription sensu Wang et al. (2014), Liu et al. (2016),
and Duan et al. (2017). Includes: Ataxipteris Holttum;
Pseudotectaria Tardieu. Monophyletic (Wang et al.,
2014; Hennequin et al., pers. comm.). About 125
species.
Cyrtomium C.Presl, Tent. Pterid.: 86, pl.2, f.26. 1836.
Lectotype (designated by J.Sm., Hist. Fil.: 204. 1875):
Cyrtomium falcatum (L.f.) C.Presl ( Polypodium
falcatum L.f.). Circumscription sensu Lu et al.
(2007), Zhang et al. (2013b), and Liu et al. (2016).
Assumed to be monophyletic (Lu et al., 2007). 35
species.
Dryopteris Adans., Fam. Pl. 2: 20. 1763. Type:
Dryopteris filix-mas (L.) Schott ( Polypodium filixmas L.). Circumscription sensu Zhang & Zhang
(2012), Zhang et al. (2012), and Zhang et al.
(2013b). Includes: Acrophorus C.Presl; Acrorumohra
(H.Ito) H.Ito; Adenoderris J.Sm, in part; Arthrobotrys
(C.Presl) Lindl.; Diacalpe Blume; Dichasium (A.Braun)
e; Diclisodon T.Moore; Dryopsis Holttum & P.J.
Fe
g.; Lophodium Newman; NephroEdwards; Filix Se
dium Marthe ex Michx.; Nothoperanema (Tagawa)
Ching; Peranema D.Don; Pycnopteris T.Moore; Revwattsia D.L.Jones; Stenolepia Alderw. Monophyletic (Zhang et al., 2012; Sessa et al., 2012; Zhang &
Zhang, 2012; McKeown et al., 2012; Kuo et al.,
2016a). About 400 species.
Phanerophlebia C.Presl, Tent. Pterid.: 84, pl.2, f.19.
1836. Type: Phanerophlebia nobilis (Schltdl. & Cham.)
C.Presl ( Aspidium nobile Schltdl. & Cham.).
Circumscription sensu Yatskievych et al. (1988) and
Liu et al. (2016). Includes: Amblia C.Presl. Monophyletic (Yatskievych et al., 1988). Eight species.
www.jse.ac.cn
25
Polystichum Roth, Tent. Fl. Germ. 3(1): 31, 69–70. 1800.
Lectotype (designated by J.Sm., Hist. Fil.: 217. 1875):
Polystichum aculeatum (L.) Roth ( Polypodium
aculeatum L.). Circumscription sensu Zhang et al.
(2013b) and Le P
echon et al. (2016). Includes: Acropelta
T.Nakai; Adenoderris J.Sm, in part; Cyrtogonellum
Ching; Cyrtomidictyum Ching; Hemesteum H.L
ev.;
Hypopeltis Michx.; Papuapteris C.Chr.; Plecosorus F
ee;
Ptilopteris Hance; Sorolepidium Christ. Monophyletic
chon et al., 2016). About 500 species.
(Le Pe
Incertae sedis
Aenigmopteris Holttum, Blumea 30: 3. 1984. Type:
Aenigmopteris dubia (Copel.) Holttum ( Dryopteris
dubia Copel.). Circumscription sensu Kramer et al.
(1990). No molecular data available. Five species.
Dryopolystichum Copel., Ann. Cryptog. Phytopathol. 5
[Gen. Fil.]: 125. 1947. Type: Dryopolystichum phaeostigma (Ces.) Copel. ( Aspidium phaeostigma Ces.).
Circumscription sensu Christenhusz et al. (2011).
Monotypic (Christenhusz et al., 2011).
46. Family Nephrolepidaceae Pic.Serm., Webbia 29(1): 8–11.
1975. Circumscription sensu Hovenkamp & Miyamoto
(2012). Family consists of a single genus and an
estimated 19 species.
Nephrolepis Schott, Gen. Fil.: 1, pl.3. 1834. Lectotype
(designated by J.Sm., Hist. Fil. 226. 1875): Nephrolepis
exaltata (L.) Schott ( Polypodium exaltatum L.).
Circumscription sensu Hennequin et al. (2010).
Monophyletic (Hennequin et al., 2010; Zhang et al.,
2016). 19 species.
47. Family Lomariopsidaceae Alston, Taxon 5(2): 25. 1956.
Circumscription sensu Christenhusz et al. (2013).
Monophyletic (Christenhusz et al., 2013; Zhang et al.,
2016). Four genera and an estimated 69 species.
Cyclopeltis J.Sm., Bot. Mag. 72: 36. 1846. Type: Cyclopeltis
semicordata (Sw.) J.Sm. ( Polypodium semicordatum
Sw.). Circumscription sensu Kramer et al. (1990).
Monophyletic (Zhang & Zhang, 2015). Six species.
Dracoglossum Christenh., Thaiszia 17(1–2): 3–6. 2007.
Type: Dracoglossum plantagineum (Jacq.) Christenh.
( Polypodium plantagineum Jacq.). Circumscription
sensu Christenhusz (2007). Monophyletic (Zhang
et al., 2016). Two species.
e, Me
m. Foug., 2. Hist. Acrostich.: 10.
Lomariopsis Fe
1845. Lectotype (designated by J.Sm., Hist. Fil.: 140.
e ( Acrostichum
1875): Lomariopsis sorbifolia (L.) Fe
sorbifolium L.). Circumscription sensu Rouhan et al.
(2007) and Moran (2000). Monophyletic (Rouhan
et al., 2007; Li et al., 2009). About 60 species.
Thysanosoria A.Gepp, Fl. Arfak Mts. (Gibbs): 193–
194, pl.4. 1917. Type: Thysanosoria dimorphophylla
J. Syst. Evol. 9999 (9999): 1–40, 2016
26
The Pteridophyte Phylogeny Group
A.Gepp. Circumscription sensu Kramer (1990h).
Genus has yet to be included in a phylogenetic
analysis. Monotypic.
48. Family Tectariaceae Panigrahi, J. Orissa Bot. Soc. 8: 41.
1986. Circumscription sensu Zhang et al. (2016).
Monophyletic (Zhang et al., 2016). Seven genera and
an estimated 250 species.
Arthropteris J.Sm. ex Hook.f., Fl. Nov.-Zel. 2: 43. 1855.
Type: Arthropteris tenella (G.Forst.) J.Sm. ex Hook.f.
( Polypodium tenellum G.Forst.). Circumscription
sensu Liu et al. (2013). Includes: Psammiosorus C.Chr.
Monophyletic (Liu et al., 2013; Zhang et al., 2016).
About 15 species.
Draconopteris Li Bing Zhang & Liang Zhang, Taxon 65
(4): 732, f.1a–b, f.3a–d. 2016. Type: Draconopteris
draconoptera (D.C.Eaton) Li Bing Zhang & Liang Zhang
( Aspidium draconopterum D.C.Eaton). Circumscription sensu Zhang et al. (2016). Monotypic.
Hypoderris R.Br. in Wall., Pl. Asiat. Rar. (Wallich) 1: 16.
1829. Lectotype (designated by J.Sm. in Hook. Gen.
Fil.: t.1. 1838.): Hypoderris brownii J.Sm. Circumscription sensu Moran et al. (2014). Monophyletic (Moran
et al., 2014; Zhang et al., 2016). Three species.
Malaifilix Li Bing Zhang & Schuettp., Taxon 65(4):
733, f.1e–f, f.3e–f. 2016. Type: Malaifilix grandidentata (Ces.) Li Bing Zhang & Schuettp. ( Polypodium
dilatatum var. grandidentatum Ces.). Circumscription sensu Zhang et al. (2016). Presumably monotypic.
Pteridrys C.Chr. & Ching, Bull. Fan Mem. Inst. Biol.
Bot. 5(3): 129. 1934. Type: Pteridrys syrmatica
(Willd.) C.Chr. & Ching ( Aspidium syrmaticum
Willd.). Circumscription sensu Christensen & Ching
(1934). Monophyletic (Zhang et al., 2016). About 10
species.
Tectaria Cav., Anales Hist. Nat. 1(2): 115. 1799. Type:
Tectaria trifoliata (L.) Cav. ( Polypodium trifoliatum
L.). Circumscription sensu Zhang et al. (2016).
Includes: Amphiblestra C.Presl; Aspidium Sw.; Bathe; Chlamydogmium C.Presl ex Link; Camptodium Fe
ramme Holttum; Cionidium T.Moore; Ctenitopsis Ching
ex Tardieu & C.Chr.; Dictyoxiphium Hook.; Dryomenis
e ex J.Sm.; Fadyenia Hook.; Grammatosorus Regel;
Fe
Hemigramma Christ; Heterogonium C.Presl; Lenda
Koidz.; Luerssenia Kuhn ex Luerssen; Microbrochis C.
e; Podopeltis Fe
e; Polydictyum
Presl; Phlebiogonium Fe
C.Presl; Psomiocarpa C.Presl; Quercifilix Copel.; Sagenia C.Presl; Stenosemia C.Presl; Tectaridium Copel.
Monophyletic (Zhang et al., 2016), but molecular data
is lacking for Amphiblestra, Camptodium, Chlamydogramme, Dryomenis, Grammatosorus, Lenda, Luerssenia, Microbrochis, Phlebiogonium, and Polydictyum
(tentatively included here based on morphology).
About 200 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Triplophyllum Holttum, Kew Bull. 41(2): 239. 1986.
Type: Triplophyllym protensum (Afzel. ex Sw.) Holttum ( Aspidium protensum Afzel. ex Sw.). Circumscription sensu Holttum (1986). Monophyletic (Prado
& Moran, 2008). About 20 species.
49. Family Oleandraceae Ching ex Pic.Serm., Webbia 20(2):
745. 1965. Circumscription sensu Smith et al. (2006b).
Family consists of a single genus and an estimated 15
species.
Oleandra Cav., Anales Hist. Nat. 1(2): 115. 1799. Type:
Oleandra neriiformis Cav. Circumscription sensu
Kramer (1990n). Monophyletic (Zhang & Zhang,
2015). At least 15 species.
50. Family Davalliaceae M.R.Schomb., Reis. Br.-Guiana 3:
883. 1848. Circumscription sensu Smith et al. (2006b).
Family consists of a single genus and an estimated 65
species.
m. Acad. Roy. Sci. (Turin) 5: 414, pl. 9,
Davallia Sm., Me
e, Me
m. Foug.,
f. 6. 1793. Lectotype (designated by Fe
5. Gen. Filic.: 328. 1852): Davallia canariensis (L.) Sm. (
Trichomanes canariense L.). Circumscription sensu
Tsutsumi et al. (2016). Includes: Araiostegia Copel.;
Araiostegiella M.Kato & Tsutsumi; Davallodes (Copel.)
e; Wibelia Bernh.
Copel.; Humata Cav.; Scyphularia Fe
Monophyletic (Tsutsumi & Kato, 2006; Tsutsumi et al.,
2016). About 65 species.
51. Family Polypodiaceae J.Presl & C.Presl, Delic. Prag.: 159.
1822. Circumscription sensu Smith et al. (2006b).
Includes: Loxogrammaceae Ching ex Pic.Serm.; Grammitidaceae Newman; Platyceriaceae Ching; Drynariaceae Ching. Monophyletic (Schuettpelz & Pryer, 2007).
Six subfamilies, 65 genera, and an estimated 1652
species.
Subfamily Loxogrammoideae H.Schneid. in Christenhusz
et al., Phytotaxa 19: 18. 2011. Circumscription equivalent
to “loxogrammoid clade“ in Kreier & Schneider (2006a).
Monophyletic (Kreier & Schneider, 2006a). Two genera
and an estimated 32 species.
Dictymia J.Sm., Companion Bot. Mag. 72: 16. 1846.
Type: Dictymia attenuata J.Sm. Circumscription sensu
Kreier & Schneider (2006a). Monophyletic (Kreier &
Schneider, 2006a). No published generic revision
available. About two species.
Loxogramme (Blume) C.Presl, Tent. Pterid.: 214–215,
pl.9, f.8. 1836. Lectotype (designated by J.Sm., Hist.
Fil.: 156. 1875): Loxogramme lanceolata (Sw.) C.Presl
( Grammitis lanceolata Sw.). Circumscription sensu
Kreier & Schneider (2006a). Includes: Anarthropteris
Copel. Monophyletic (Kreier & Schneider, 2006a). No
published generic revision available. 30 species.
Subfamily Platycerioideae B.K.Nayar, Taxon 19: 233.
1970. Circumscription sensu Hennipman et al. (1990).
www.jse.ac.cn
PPG I
Monophyletic (Kreier & Schneider, 2006b). Two genera
and an estimated 70 species.
Platycerium Desv., M
em. Soc. Linn. Paris 6(3): 213.
1827. Lectotype (designated by Pfeiff., Nomencl. Bot.
2: 746. 1873): Platycerium alcicorne Desv. Circumscription sensu Hennipman et al. (1990). Monophyletic
(Kreier & Schneider, 2006b). 18 species.
Pyrrosia Mirb., Hist. Nat. Veg. 3: 471. 1803. Type:
Pyrrosia chinensis Desv. Circumscription sensu Hennipman et al. (1990). Includes: Drymoglossum C.Presl.
Assumed to be monophyletic (Kreier & Schneider,
2006b), but paraphyly relative to Platycerium has not
yet been definitively excluded. At least 52 species.
Subfamily Drynarioideae Crabbe, Jermy & Mickel, Fern
Gaz. 11: 156. 1975. Circumscription sensu Christenhusz
et al. (2011). Monophyletic (Schneider et al., 2008). Six
genera and an estimated 148 species.
Aglaomorpha Schott, Gen. Fil.: t.19. 1836. Type:
Aglaomorpha meyeniana Schott. Circumscription
newly proposed in this classification. Includes:
Christiopteris Copel., Drynaria J.Sm., Dryostachyum
J.Sm., Merinthosorus Copel., Photinopteris J.Sm.,
Pseudodrynaria C.Chr., Thayeria Copel. Monophyletic
(Schneider et al., 2008). 50 species.
Arthromeris (T.Moore) J.Sm., Hist. Fil.: 110. 1875. Type:
Arthromeris wallichiana (Spreng.) Ching ( Polypodium wallichianum Spreng.). Circumscription sensu
Hennipman et al. (1990). Assumed to be monophyletic (Schneider et al., 2008), but comprehensive
analysis is lacking to date. Perhaps a few more
species, if a narrower species concept is used. Eight
species.
Gymnogrammitis Griff., Icon. Pl. Asiat. 2: t.129, f.1.
1849. Type: Gymnogrammitis dareiformis (Hook.)
Ching ex Tardieu & C.Chr. ( Polypodium dareiforme
Hook.). Circumscription sensu Kramer (1990c). Monotypic.
Paraselliguea Hovenkamp, Blumea 45(2): 376. 2000.
Type: Paraselliguea leucophora (Baker) Hovenkamp
( Polypodium leucophorum Baker). Circumscription
sensu Hovenkamp (1997). Monotypic.
Polypodiopteris C.F.Reed, Amer. Fern J. 38: 87. 1948.
Type: Polypodiopteris proavita (Copel.) C.F.Reed (
Polypodium proavitum Copel.). Circumscription sensu
Hennipman et al. (1990). Assumed to be monophyletic, but only one species has been sampled to date.
Three species.
Selliguea Bory, Dict. Class. Hist. Nat. 6: 587–588. 1824.
Type: Selliguea feei Bory. Circumscription sensu
Schneider et al. (2008). Includes: Crypsinus C.Presl;
Himalayopteris W.Shao & S.G.Lu; Phymatopsis J.Sm.;
Pichisermollodes Fraser-Jenk. & Challis. Not
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27
monophyletic as circumscribed (Schneider et al.,
2008; Li et al., 2012a); Selliguea appears to be
polyphyletic relative to Arthromeris, Gymnogrammitis, and Polypodiopteris, but additional study is
needed. At least 85 species.
Subfamily Microsoroideae B.K.Nayar, Taxon 19(2): 233.
1970. Circumscription equivalent to “microsoroids” in
Kreier et al. (2008b). Monophyletic (Schneider et al.,
2004c). 12 genera and an estimated 183 species.
Goniophlebium (Blume) C.Presl, Tent. Pterid.: 185,
€ dlpl.7, f.13–14. 1836. Lectotype (designated by Ro
Linder, Zijlstra & Tryon, Taxon 39(1): 105. 1990):
Goniophlebium subauriculatum (Blume) C.Presl (
Polypodium subauriculatum Blume). Circumscription
sensu Kreier et al. (2008b). Includes: Metapolypodium
Ching; Polypodiastrum Ching; Polypodiodes Ching.
Monophyletic (Kreier et al., 2008b). 25 species.
Lecanopteris Reinw. ex Blume, Enum. Pl. Javae 2: 120.
1828. Type: Lecanopteris carnosa (Reinw.) Blume (
Onychium carnosum Reinw.). Circumscription sensu
Hennipman et al. (1990). Monophyletic (Kreier et al.,
2008b). 13 species.
€ hm. Ges.
Lemmaphyllum C.Presl, Abh. Koenigl. Bo
Wiss. Ser. 5 6: 517–518. 1851. Lectotype (designated by
Copel., Ann. Cryptog. Phytopathol. 5 [Gen. Fil.]: 189.
1947): Lemmaphyllum spathulatum C.Presl. Circumscription sensu Wang et al. (2010). Includes: Caobangia A.R.Sm. & X.C.Zhang; Lepidogrammitis Ching;
Weatherbya Copel. Monophyletic (Wang et al., 2010).
At least two species.
Lepidomicrosorium Ching & K.H.Shing, Bot. Res.
Academia Sinica 1(1): 1–14, pl.1–5. 1983. Type: Lepidomicrosorium subhastatum (Baker) Ching ( Polypodium
subhastatum Baker). Circumscription sensu Wang et al.
(2010). Apparently monotypic (Wang et al., 2010).
Lepisorus (J.Sm.) Ching, Bull. Fan Mem. Inst. Biol. Bot.
4(3): 47, 56–58. 1933. Type: Lepisorus nudus (Hook.)
Ching ( Pleopeltis nuda Hook.). Circumscription
sensu Wang et al. (2010). Includes: Belvisia Mirb.;
Drymotaenium Makino. Monophyletic (Wang et al.,
2010). 80 species.
Leptochilus Kaulf., Enum. Filic.: 147, pl.1, f.10. 1824.
Type: Leptochilus axillaris (Cav.) Kaulf. ( Acrostichum
axillare Cav.). Circumscription sensu Kreier et al.
(2008b). Includes: Colysis C.Presl; Kontumia S.K.Wu &
K.L.Phan. Monophyletic (Kreier et al., 2008b). 10
species.
Microsorum Link, Hort. Berol. 2: 110. 1833. Type:
Microsorum irregulare Link. Circumscription sensu
Kreier et al. (2008b). Includes: Dendroconche Copel.;
Kaulinia B.K.Nayar; Phymatosorus Pic.Serm. Not
monophyletic as circumscribed (Kreier et al.,
2008b); Microsorum is apparently paraphyletic
J. Syst. Evol. 9999 (9999): 1–40, 2016
28
The Pteridophyte Phylogeny Group
relative to Lecanopteris, Leptochilus, Neocheiropteris,
Neolepisorus, and Tricholepidium, but further study is
needed. 40 species.
Neocheiropteris Christ, Bull. Soc. Bot. France 52
(M
em. 1): 21. 1905. Type: Neocheiropteris palmatopedata (Baker) Christ ( Polypodium palmatopedatum
Baker). Circumscription sensu Wang et al. (2010).
Monophyletic (Kreier et al., 2008b; Wang et al., 2010;
Du & Cheng, 2011). Two species.
Neolepisorus Ching, Bull. Fan Mem. Inst. Biol. Bot. 10
(1): 11–12. 1940. Type: Neolepisorus ensatus (Thunb.)
Ching ( Polypodium ensatum Thunb.). Circumscription sensu Wang et al. (2010). Monophyletic (Wang
et al., 2010). The generic affinities have not been
evaluated for all species possibly belonging here. At
least five species.
Paragramma (Blume) T.Moore, Index Filic. xxxii. 1857.
Lectotype (designated by J.Sm., Hist. Fil.: 114. 1875):
Paragramma longifolia (Blume) T.Moore ( Grammitis
longifolia Blume). Circumscription sensu Wang et al.
(2010). Only the type species has been sampled to
date; the second species is highly distinct and may
ultimately be resolved elsewhere. Perhaps two
species.
Thylacopteris Kunze ex J.Sm., Hist. Fil.: 87. 1875. Type:
Thylacopteris papillosa (Blume) J.Sm. ( Polypodium
papillosum Blume). Circumscription sensu Hennipman
et al. (1990). Assumed to be monophyletic, but only
the type species has been sampled to date. Two
species.
Tricholepidium Ching, Acta Phytotax. Geobot. 29(1–5):
41. 1978. Type: Tricholepidium normale (D.Don) Ching
( Polypodium normale D.Don). Circumscription sensu
Wang et al. (2010). Monotypic (Wang et al., 2010), but
in need of further evaluation.
Subfamily Polypodioideae Sweet, Hort. Brit.: 460. 1826.
Newly circumscribed in this classification. Paraphyletic
relative to the Grammitidoideae (Schneider et al.,
2004c). Nine genera and an estimated 305 species.
Campyloneurum C.Presl, Tent. Pterid.: 189. 1836.
Lectotype (designated by J.Sm., Hist. Fil.: 95. 1875):
Campyloneurum repens (Aubl.) C.Presl ( Polypodium
n (1995),
repens Aubl.). Circumscription sensu Leo
Schneider et al. (2004c), and Kreier et al. (2007).
Includes: Hyalotricha Copel.; Hyalotrichopteris W.H.
Wagner. Monophyletic (Schneider et al., 2004c).
About 50 species.
Microgramma C.Presl, Tent. Pterid.: 213. 1836. Type:
Microgramma persicariifolia (Schrad.) C.Presl (
Polypodium persicariifolium Schrad.). Circumscription
sensu Salino et al. (2008). Includes: Solanopteris
Copel. Monophyletic (Salino et al., 2008). A generic
revision is lacking. About 30 species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
Niphidium J.Sm., Hist. Fil.: 99. 1875. Type: Niphidium
americanum (Hook.) J.Sm. ( Polypodium americanum Hook.). Circumscription sensu Hennipman
et al. (1990). Monophyletic (Salino et al., 2008). 10
species.
Pecluma M.G.Price, Amer. Fern J. 73(4): 109. 1983.
Type: Pecluma pectinata (L.) M.G.Price ( Polypodium
pectinatum L.). Circumscription sensu Assis et al.
(2016). Monophyletic (Assis et al., 2016). 40 species.
Phlebodium (R.Br.) J.Sm., J. Bot. (Hooker) 4: 58. 1841.
Lectotype (designated by J.Sm., Hist. Fil.: 94. 1875):
Phlebodium aureum (L.) J.Sm. ( Polypodium aureum
L.). Circumscription sensu Mickel & Smith (2004).
Monophyletic (Assis et al., 2016). Four species.
Pleopeltis Humb. & Bonpl. ex Willd., Sp. Pl., ed. 4, 5:
211. 1810. Type: Pleopeltis angusta Humb. & Bonpl. ex
Willd. Circumscription sensu Smith & Tejero-Dıez
(2014). Includes: Cheilogramma Maxon; Dicranoglossum J.Sm.; Eschatogramme Trevis.; Lepicystis (J.Sm.)
J.Sm.; Marginaria Bory; Marginariopsis C.Chr.; Micro mez; Neurodium Fe
e; Paltonium C.
phlebodium L.D.Go
mez. Monophyletic (Otto
Presl; Pseudocolysis L.D.Go
et al., 2009). In need of a generic revision. About 90
species.
Pleurosoriopsis Fomin, Izv. Kievsk. Bot. Sada 11: 8.
1930. Type: Pleurosoriopsis makinoi (Maxim. ex
Makino) Fomin ( Gymnogramma makinoi Maxim.
ex Makino). Circumscription sensu Hennipman et al.
(1990). Monotypic (Assis et al., 2016).
Polypodium L., Sp. Pl. 2: 1082. 1753. Lectotype
(designated by J.Sm., Hist. Fil.: 88. 1875): Polypodium vulgare L. Circumscription sensu Sigel et al.
(2014) and Assis et al. (2016). Presumably monophyletic (Sigel et al., 2014; Assis et al., 2016). Perhaps 40
species.
Serpocaulon A.R.Sm., Taxon 55(4): 924–927, f. 3-4.
2006. Type: Serpocaulon loriceum (L.) A.R.Sm. (
Polypodium loriceum L.). Circumscription sensu Smith
et al. (2006a). Monophyletic (Smith et al., 2006a;
Kreier et al., 2008a). About 40 species.
Subfamily Grammitidoideae Parris & Sundue, this
classification (see below). Circumscription equivalent
to “grammitids” in Sundue et al. (2014). Monophyletic (Ranker et al., 2004; Schneider et al., 2004c;
Sundue et al., 2014). 33 genera and an estimated 911
species.
Acrosorus Copel., Philipp. J. Sci. 1(Suppl. 2): 158–159.
1906. Lectotype (designated by Copel., Univ. Calif.
Publ. Bot. 16: 108. 1929): Acrosorus exaltatus (Copel.)
Copel. ( Davallia exaltata Copel.). Circumscription
sensu Parris (1990) and Sundue et al. (2014). Assumed
to be monophyletic, but only one species sampled to
date (Sundue et al., 2014). Nine species.
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PPG I
Adenophorus Gaudich., Ann. Sci. Nat. (Paris) 3:
508. 1824. Lectotype (designated by J.Sm., Hist.
Fil.: 187. 1875): Adenophorus tripinnatifidus Gaudich. Circumscription sensu Ranker (2008) and
Sundue et al. (2014). Includes: Amphoradenium
Desv. Monophyletic (Sundue et al., 2014). 10
species.
Alansmia M.Kessler, Moguel, Sundue & Labiak,
Brittonia 63(2): 238. 2011. Type: Alansmia lanigera
(Desv.) Moguel & M.Kessler ( Polypodium lanigerum
Desv.). Circumscription sensu Kessler et al. (2011) and
Sundue et al. (2014). Monophyletic (Sundue et al.,
2014). 26 species.
Archigrammitis Parris, Fern Gaz. 19(4): 135–136. 2013.
Type: Archigrammitis friderici-et-pauli (Christ) Parris
( Polypodium friderici-et-pauli Christ). Circumscription sensu Parris (2013). No molecular data available.
Seven species.
Ascogrammitis Sundue, Brittonia 62(4): 361. 2010.
Type: Ascogrammitis athyrioides (Hook.) Sundue (
Polypodium athyrioides Hook.). Circumscription sensu
Sundue (2010) and Sundue et al. (2014). Monophyletic
(Sundue et al., 2014). 17 species.
Calymmodon C.Presl, Tent. Pterid.: 203–204, pl.9, f.1.
1836. Type: Calymmodon cucullatus (Nees & Blume) C.
Presl ( Polypodium cucullatum Nees & Blume).
Circumscription sensu Parris (1990) and Sundue et al.
(2014). Includes: Plectopteris F
ee. Monophyletic
(Sundue et al., 2014). 65 species.
Ceradenia L.E.Bishop, Amer. Fern J. 78(1): 2. 1988.
Type: Ceradenia curvata (Sw.) L.E.Bishop ( Polypodium curvatum Sw.). Circumscription sensu Bishop
(1988) and Sundue et al. (2014). Monophyletic
(Sundue et al., 2014). About 73 species.
Chrysogrammitis Parris, Kew Bull. 3(4): 909. 1998.
Type: Chrysogrammitis glandulosa (J.Sm.) Parris (
Ctenopteris glandulosa J.Sm.). Circumscription sensu
Parris (1998) and Sundue et al. (2014). Monophyletic
(Sundue et al., 2014). Two species.
Cochlidium Kaulf., Berlin. Jahrb. Pharm. Verbundenen Wiss. 21: 36. 1820. Lectotype (designated by
Copel., Ann. Cryptog. Phytopathol. 5 [Gen. Fil.]: 213.
1947): Cochlidium graminoides (Sw.) Kaulf. (
Acrostichum graminoides Sw.). Circumscription
sensu Bishop (1978) and Sundue et al. (2014).
Includes: Xiphopteris Kaulf.; Micropteris Desv.;
Pleurogramme Blume. Monophyletic, but nested
within Grammitis (Sundue et al., 2014). Grammitis s.s.
was found to be paraphyletic with regards to
Cochlidium in Sundue et al. (2014), but the type,
Grammitis marginella, has not been sampled. We
prefer to maintain both genera as they are circumscribed until additional data becomes available. 18
species.
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29
Ctenopterella Parris, Gard. Bull. Singapore 58(2): 234.
2007. Type: Ctenopterella blechnoides (Grev.) Parris
( Grammitis blechnoides Grev.). Circumscription
sensu Parris (2007) and Sundue et al. (2014). Only
one species sampled to date (Sundue et al., 2014). 24
species.
Dasygrammitis Parris, Gard. Bull. Singapore 58(2):
238. 2007. Type: Dasygrammitis mollicoma (Nees &
Blume) Parris ( Polypodium mollicomum Nees &
Blume). Circumscription sensu Parris (2007) and
Sundue et al. (2014). Monophyletic (Sundue et al.,
2014). 12 species.
Enterosora Baker, Timehri 5: 218. 1886. Type: Enterosora campbellii Baker. Circumscription sensu Bishop
& Smith (1992) pro parte and Sundue et al. (2014).
Monophyletic, but nested within Zygophlebia (Sundue et al., 2014). This could be resolved by placing
Zygophlebia in synonymy. However, this would be
premature since the type of Enterosora has not yet
been sampled and its placement is not certain. 11
species.
Galactodenia Sundue & Labiak, Syst. Bot. 37(2): 340.
2012. Type: Galactodenia delicatula (M.Martens &
Galeotti) Sundue & Labiak ( Polypodium delicatulum
M.Martens & Galeotti). Circumscription sensu Sundue
et al. (2012, 2014). Monophyletic (Sundue et al., 2014).
Five species.
Grammitis Sw., J. Bot. (Schrader) 2: 3, 17. 1801.
Lectotype (designated by C.Chr., Index Filic. xlix.
1906): Grammitis marginella (Sw.) Sw. ( Polypodium
marginellum Sw.). Circumscription sensu Bishop
(1977) pro parte and Sundue et al. (2014). Grammitis s.s. is paraphyletic relative to Cochlidium (Sundue et al.,
2014), but the type, G. marginella, has not been
sampled. We prefer to maintain both genera as they
are circumscribed until additional data become
available. 43 species.
Lellingeria A.R.Sm. & R.C.Moran, Amer. Fern J. 81(3):
76. 1991. Type: Lellingeria apiculata (Kunze ex
Klotzsch) A.R.Sm. & R.C.Moran ( Polypodium
apiculatum Kunze ex Klotzsch). Circumscription sensu
Labiak (2013) and Sundue et al. (2014). Monophyletic
(Sundue et al., 2014). 49 species.
Leucotrichum Labiak, Taxon 59(3): 915. 2010. Type:
Leucotrichum organense (Gardner) Labiak ( Grammitis organensis Gardner). Circumscription sensu
Labiak et al. (2010), Rouhan et al. (2012), and Sundue
et al. (2014). Monophyletic (Sundue et al., 2014). Six
species.
Lomaphlebia J.Sm., Hist. Fil.: 182. 1875. Type: Lomaphlebia linearis (Sw.) J.Sm. ( Grammitis linearis Sw.).
Circumscription sensu Sundue et al. (2014). Assumed
to be monophyletic, but only one species sampled to
date (Sundue et al., 2014). Two species.
J. Syst. Evol. 9999 (9999): 1–40, 2016
30
The Pteridophyte Phylogeny Group
Luisma M.T.Murillo & A.R.Sm., Novon 13(3): 313–316, f.
1. 2003. Type: Luisma bivascularis M.T.Murillo & A.R.
Sm. Circumscription sensu Murillo & Smith (2003).
Monotypic.
Melpomene A.R.Sm. & R.C.Moran, Novon 2(4): 426.
1992. Type: Melpomene moniliformis (Lag. ex Sw.) A.R.
Sm. & R.C.Moran ( Polypodium moniliforme Lag. ex
Sw.). Circumscription sensu Lehnert (2013) and
Sundue et al. (2014). Monophyletic (Sundue et al.,
2014). 29 species.
Micropolypodium Hayata, Bot. Mag. (Tokyo) 42(449):
341. 1928. Type: Micropolypodium pseudotrichomanoides (Hayata) Hayata ( Polypodium pseudotrichomanoides Hayata). Circumscription sensu Smith
(1992) pro parte, Hirai et al. (2011), and Sundue
et al. (2014). Monophyletic (Sundue et al., 2014).
Three species.
Moranopteris R.Y.Hirai & J.Prado, Taxon 60(4): 1127.
2011. Type: Moranopteris basiattenuata (Jenman) R.Y.
Hirai & J.Prado ( Polypodium basiattenuatum Jenman). Circumscription sensu Hirai et al. (2011) and
Sundue et al. (2014). Monophyletic (Sundue et al.,
2014). 31 species.
Mycopteris Sundue, Brittonia 66(2): 175, f.1–2. 2013.
Type: Mycopteris taxifolia (L.) Sundue ( Polypodium
taxifolium L.). Circumscription sensu Sundue (2013)
and Sundue et al. (2014). Monophyletic (Sundue et al.,
2014). 21 species.
Notogrammitis Parris, New Zealand J. Bot. 50(4): 465.
2012. Type: Notogrammitis billardierei (Willd.) Parris
( Grammitis billardierei Willd.). Circumscription
sensu Perrie and Parris (2012). Monophyletic (Sundue
et al., 2014). 16 species.
Oreogrammitis Copel., Philipp. J. Sci. 12: 64. 1917.
Type: Oreogrammitis clemensiae Copel. Circumscription sensu Parris (2007) and Sundue et al. (2014).
Not monophyletic and in need of redefinition
(Sundue et al., 2014). Themelium is monophyletic
in Sundue et al. (2014), but nested within a clade
containing polyphyletic Oreogrammitis and Radiogrammitis. The types of Oreogrammitis and Themelium remain to be sampled, and thus we
recommend maintaining these genera pending
further research. 156 species.
Prosaptia C.Presl, Tent. Pterid.: 165–166, pl.6, f.19, 25.
1836. Lectotype (designated by J.Sm., Hist. Fil.: 86.
1875): Prosaptia contigua (G.Forst.) C.Presl ( Trichomanes contiguum G.Forst.). Circumscription sensu
Parris (2010a, 2010b) and Sundue et al. (2014).
Includes: Ctenopteris Blume ex Kunze; Cryptosorus
e. Monophyletic (Sundue et al., 2014). 87 species.
Fe
Radiogrammitis Parris, Gard. Bull. Singapore 58(2):
240. 2007. Type: Radiogrammitis setigera (Blume)
J. Syst. Evol. 9999 (9999): 1–40, 2016
Parris ( Polypodium setigerum Blume). Circumscription sensu Parris (2007) and Sundue et al. (2014). Not
monophyletic and in need of redefinition (Sundue
et al., 2014). Themelium is monophyletic in Sundue
et al. (2014), but nested within a clade containing
polyphyletic Oreogrammitis and Radiogrammitis. The
types of Oreogrammitis and Themelium remain to be
sampled, and thus we recommend maintaining these
genera pending further research. 36 species.
Scleroglossum Alderw., Bull. Jard. Bot. Buitenzorg, ser.
2, 2(7): 37–39. 1912. Lectotype (designated by Copel.,
Ann. Cryptog. Phytopathol. 5 [Gen. Fil.]: 213. 1947):
Scleroglossum pusillum (Blume) Alderw. ( Vittaria
pusilla Blume). Circumscription sensu Parris (1990) and
Sundue et al. (2014). Includes: Nematopteris Alderw.
Monophyletic (Sundue et al., 2014). Seven species.
Stenogrammitis Labiak, Brittonia 63(1): 141, f.1A–M,
2A–F. 2011. Type: Stenogrammitis myosuroides (Sw.)
Labiak ( Polypodium myosuroides Sw.). Circumscription sensu Labiak (2011) and Sundue et al. (2014).
Monophyletic (Sundue et al., 2014). 31 species.
Terpsichore A.R.Sm., Novon 3(4): 479. 1993. Type:
Terpsichore asplenifolia (L.) A.R.Sm. ( Polypodium
asplenifolium L.). Circumscription sensu Smith (1993)
pro parte and Sundue et al. (2014). Monophyletic
(Sundue et al., 2014). 12 species.
Themelium (T.Moore) Parris, Kew Bull. 52(3): 737.
1997. Type: Themelium tenuisectum (Blume) Parris (
Polypodium tenuisectum Blume). Circumscription
sensu Parris (1997, 2004, 2010b) and Sundue et al.
(2014). Themelium is monophyletic in (Sundue et al.,
2014), but nested within a clade containing polyphyletic Oreogrammitis and Radiogrammitis. The types of
Oreogrammitis and Themelium remain to be sampled,
and thus we recommend maintaining these genera
pending further research. 29 species.
Tomophyllum (E.Fourn.) Parris, Gard. Bull. Singapore
58(2): 245. 2007. Lectotype (designated by Parris,
Gard. Bull. Singapore 58(2): 245. 2007): Tomophyllum
subsecundodissectum (Zoll.) Parris ( Polypodium
subsecundodissectum Zoll.). Circumscription sensu
Parris (2007) and Sundue et al. (2014). Monophyletic
(Sundue et al., 2014). 42 species.
Xiphopterella Parris, Gard. Bull. Singapore 58(2): 249.
2007. Type: Xiphopterella hieronymusii (C.Chr.) Parris
( Polypodium hieronymusii C.Chr.). Circumscription
sensu Parris (2007) and Sundue et al. (2014).
Monophyletic (Sundue et al., 2014). 11 species.
Zygophlebia L.E.Bishop, Amer. Fern J. 79(3): 107.
1989. Type: Zygophlebia sectifrons (Kunze ex Mett.)
L.E.Bishop ( Polypodium sectifrons Kunze ex Mett.).
Circumscription sensu Bishop (1989) and Sundue et al.
(2014). Paraphyletic relative to Enterosora (Sundue
et al., 2014). This could be resolved by placing
www.jse.ac.cn
PPG I
Zygophlebia in synonymy. However, this would be
premature since the type of Enterosora has not yet
been sampled and its placement is not certain. 20
species.
Incertae sedis
Synammia C.Presl, Tent. Pterid.: 212, t.9, f.11. 1836.
Lectotype (designated by Copel., Ann. Cryptog. Phytopathol. 5 [Gen. Fil.]: 212. 1947): Synammia triloba (Cav.) C.
Presl. Circumscription sensu Schneider et al. (2006).
Monophyletic (Schneider et al., 2006). Three species.
Nomenclatural novelties
Aspleniineae H.Schneid. & C.J.Rothf., stat. nov. Aspleniaceae Newman, Hist. Brit. Ferns 6. 1840. Type: Asplenium L.
(1753)—Polypodiales.
Claytosmunda (Y.Yatabe, N.Murak. & K.Iwats.) Metzgar &
Rouhan, stat. nov. Osmunda subg. Claytosmunda Y.Yatabe,
N.Murak. & K.Iwats., Acta Phytotax. Geobot. 56(2): 127–128.
2005. Type: Claytosmunda claytoniana (L.) Metzgar & Rouhan
( Osmunda claytoniana L.).
Claytosmunda claytoniana (L.) Metzgar & Rouhan, comb. nov.
Osmunda claytoniana L., Sp. Pl. 2: 1066. 1753.
Dennstaedtiineae Schwartsb. & Hovenkamp, subord. nov.
Type: Dennstaedtia Bernh. (1801) [1800]. Type: Dennstaedtiaceae Polypodiales.
Rhizome generally dorsiventral and long-creeping, covered
with hairs or proto-scales (true scales absent); sori marginal or
sub-marginal, generally protected by marginal pseudo-indusia
or by laminar true indusia (sometimes both are present),
rarely fully exindusiate.
Grammitidoideae Parris & Sundue, stat. nov. Grammitidaceae Newman, Hist. Brit. Ferns: 7. 1840, as “Grammitideae”.
Type: Grammitis Sw. (1801) [1800]—Polypodiaceae.
Lindsaeineae Lehtonen & Tuomisto, subord. nov. Type: Lindsaea
Dryand. ex J.Sm. (1793), as Lindsaeaceae—Polypodiales.
Rhizome short- to long-creeping (rarely ascending), covered with non-clathrate scales or rarely hairs; petioles with
one or rarely two (or several fusing into two in the upper part
of stipe) vascular bundles; sori marginal to sub-marginal,
generally protected by laminar true indusia or rarely by
marginal pseudo-indusia or both.
Mankyuoideae J.R.Grant & B.Dauphin, subfam. nov. Type:
Mankyua B.Y.Sun, M.H.Kim & C.H.Kim.—Ophioglossaceae.
Based on the diagnosis associated with Mankyua B.Y.Sun,
M.H.Kim & C.H.Kim, Taxon 50(4): 1020, f. 1. 2002.
Phegopteridoideae Salino, A.R.Sm. & T.E.Almeida, subfam.
nov. Type: Phegopteris (C.Presl) F
ee (1852)—Thelypteridaceae.
Laminae bipinnate-pinnatifid or more divided, or laminae
bipinnatifid or tripinnatifid; costae adaxially lacking grooves;
veins free, not reaching the margins; chromosome base
numbers x ¼ 30 or 31.
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31
Pteridineae J.Prado & Schuettp., stat. nov. Pteridaceae
E.D.M.Kirchn., Schul-Bot. 109. 1831. Type: Pteris L. (1753)—
Polypodiales.
Saccolomatineae Hovenkamp, subord. nov. Type: Saccoloma
Kaulf. (1820) Saccolomataceae.
Rhizome erect, covered with multistratose, non-clathrate
scales, in cross-section with two concentric rings of meristeles, sori cup-shaped, spores trilete, tetrahedral.
Acknowledgements
We thank all pteridologists, past and present, who have
provided the taxonomic and phylogenetic foundation for this
effort.
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