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Tree ferns: Monophyletic groups and their relationships as revealed by four protein-coding plastid loci
Department of Biology, Duke University, Durham, NC 27708, USA, Department of Phanerogamic Botany, Swedish Museum of Natural History, Stockholm, Sweden.
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2006 (English)In: Molecular Phylogenetics and Evolution, ISSN 1055-7903, E-ISSN 1095-9513, Vol. 39, no 3, 830-845 p.Article in journal (Refereed) Published
Abstract [en]

Tree ferns are a well-established clade within leptosporangiate ferns. Most of the 600 species (in seven families and 13 genera) are arborescent, but considerable morphological variability exists, spanning the giant scaly tree ferns (Cyatheaceae), the low, erect plants (Plagiogyriaceae), and the diminutive endemics of the Guayana Highlands (Hymenophyllopsidaceae). In this study, we investigate phylogenetic relationships within tree ferns based on analyses of four protein-coding, plastid loci (atpA, atpB, rbeL, and rps4). Our results reveal four well-supported clades, with genera of Dicksoniaceae (sensu Kubitzki, 1990) interspersed among them: (A) (Loxomataceae, (Culcita, Plagiogyriaceae)), (B) (Calochlaena, (Dicksonia, Lophosoriaceae)), (C) Cibotium, and (D) Cyatheaceae, with Hymenophyllopsidaceae nested within. How these four groups are related to one other, to Thyrsopteris, or to Metaxyaceae is weakly supported. Our results show that Dicksoniaceae and Cyatheaceae, as currently recognised, are not monophyletic and new circumscriptions for these families are needed. (c) 2006 Elsevier Inc. All rights reserved.

Place, publisher, year, edition, pages
2006. Vol. 39, no 3, 830-845 p.
Keyword [en]
atpA, atpB, Cyatheaceae, Dicksoniaceae, Hymenophyllopsidaceae, long-branch attraction, Lophosoriaceae, Loxomataceae, Metaxyaceae, phylogeny, Plagiogyriaceae, rbcL, rps4, tree ferns1
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Biological Systematics
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URN: urn:nbn:se:uu:diva-162133DOI: 10.1016/j.ympev.2006.01.001ISI: 000238155300017OAI: oai:DiVA.org:uu-162133DiVA: diva2:459020
Available from: 2011-11-24 Created: 2011-11-24 Last updated: 2017-12-08

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Korall, Petra

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