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New insights into the phylogeny of Pleopeltis and related Neotropical genera (Polypodiaceae, Polypodiopsida).

Abstract：

:The fern family Polypodiaceae plays an important role in Neotropical epiphyte diversity. Most of its American representatives are assembled in a monophyletic clade that, apart from the grammitids, nearly exclusively comprises species restricted to the New World. The phylogenetic relationships of these ferns are still insufficiently understood and many taxonomic problems, such as natural circumscriptions of the genera Polypodium and Pleopeltis, were unresolved. Here we address one of the two main lineages within New World Polypodiaceae including Pecluma, Phlebodium, Pleopeltis, and Polypodium. Our study is based on DNA sequence data from four plastid regions that were generated for 72 species representing all putative major taxonomic groups within this lineage. The analyses reveal three major clades: (1) Polypodium plus Pleurosoriopsis; (2) Pecluma plus Phlebodium, and some species of Polypodium; and (3) Pleopeltis and related genera. The last clade contains species of Pleopeltis and Polypodium as well as Microphlebodium, Neurodium, Dicranoglossum, and Pseudocolysis. All species included in the clade display conspicuous persistent peltate laminar scales that are not found in other species of this lineage. Our results suggest a reconsideration of the generic concept of Pleopeltis with peltate laminar scales being the genus' key character.

journal_name

Mol Phylogenet Evol

journal_title

Molecular phylogenetics and evolution

authors

Otto EM,Janssen T,Kreier HP,Schneider H

doi

10.1016/j.ympev.2009.05.001

subject

Has Abstract

pub_date

2009-10-01 00:00:00

pages

190-201

issue

1

eissn

1055-7903

issn

1095-9513

pii

S1055-7903(09)00172-9

journal_volume

53

pub_type

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