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Divergence times and the evolution of epiphytism in filmy ferns (Hymenophyllaceae) revisited

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Date
2008-11-01
Authors
Hennequin, S
Schuettpelz, E
Pryer, KM
Ebihara, A
Dubuisson, J
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Abstract
Although the phylogeny of the filmy fern family (Hymenophyllaceae) is rapidly coming into focus, much remains to be uncovered concerning the evolutionary history of this clade. In this study, we use two data sets (108-taxon rbcL+ rps4, 204-taxon rbcL) and fossil constraints to examine the diversification of filmy ferns and the evolution of their ecology within a temporal context. Our penalized likelihood analyses (with both data sets) indicate that the initial divergences within the Hymenophyllaceae (resulting in extant lineages) and those within one of the two major clades (trichomanoids) occurred in the early to middle Mesozoic. There was a considerable delay in the crown group diversification of the other major clade (hymenophylloids), which began to diversify only in the Cretaceous. Maximum likelihood and Bayesian character state reconstructions across the broadly sampled single-gene (rbcL) phylogeny do not allow us to unequivocally infer the ancestral habit for the family or for its two major clades. However, adding a second gene (rps4) with a more restricted taxon sampling results in a hypothesis in which filmy ferns were ancestrally terrestrial, with epiphytism having evolved several times independently during the Cretaceous. © 2008 by The University of Chicago. All rights reserved.
Type
Journal article
Subject
Science & Technology
Life Sciences & Biomedicine
Plant Sciences
divergence time estimates
diversification
ecological evolution
epiphytism
ferns
GENUS TRICHOMANES HYMENOPHYLLACEAE
RBCL NUCLEOTIDE-SEQUENCES
PHYLOGENETIC-RELATIONSHIPS
SEED PLANTS
MOLECULAR SYSTEMATICS
S.L. HYMENOPHYLLACEAE
L. HYMENOPHYLLACEAE
ABSOLUTE RATES
GENES
FILICOPSIDA
Permalink
https://hdl.handle.net/10161/21808
Published Version (Please cite this version)
10.1086/591983
Publication Info
Hennequin, S; Schuettpelz, E; Pryer, KM; Ebihara, A; & Dubuisson, J (2008). Divergence times and the evolution of epiphytism in filmy ferns (Hymenophyllaceae) revisited. International Journal of Plant Sciences, 169(9). pp. 1278-1287. 10.1086/591983. Retrieved from https://hdl.handle.net/10161/21808.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Pryer

Kathleen M. Pryer

Professor of Biology
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