uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
A molecular phylogeny of scaly tree ferns (Cyatheaceae)
Department of Biology, Duke University, Durham, North Carolina 27708-0338, U.S.A.; Department of Phanerogamic Botany, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden. .
Show others and affiliations
2007 (English)In: American Journal of Botany, ISSN 0002-9122, E-ISSN 0032-0919, Vol. 94, no 5, 873-886 p.Article in journal (Refereed) Published
Abstract [en]

Tree ferns recently were identified as the closest sister group to the hyperdiverse clade of ferns, the polypods. Although most of the 600 species of tree ferns are arborescent, the group encompasses a wide range of morphological variability, from diminutive members to the giant scaly tree ferns, Cyatheaceae. This well-known family comprises most of the tree fern diversity (similar to 500 species) and is widespread in tropical, subtropical, and south temperate regions of the world. Here we investigate the phylogenetic relationships of scaly tree ferns based on DNA sequence data from five plastid regions (rbcL, rbcL-accD IGS, rbcL-atpB IGS, trnG-trnR, and trnL-trnF). A basal dichotomy resolves Sphaeropteris as sister to all other taxa and scale features support these two clades: Sphaeropteris has conform scales, whereas all other taxa have marginate scales. The marginate-scaled clade consists of a basal trichotomy, with the three groups here termed (1) Cyathea (including Cnemidaria, Hymenophyllopsis, Trichipteris), (2) Alsophila sensu stricto, and (3) Gymnosphaera (previously recognized as a section within Alsophila) + A. capensis. Scaly tree ferns display a wide range of indusial structures, and although indusium shape is homoplastic it does contain useful phylogenetic information that supports some of the larger clades recognised.

Place, publisher, year, edition, pages
2007. Vol. 94, no 5, 873-886 p.
Keyword [en]
Alsophila, Cyathea, Cyatheaceae, homopolymer, Hymenophyllopsis, rbcL-accD IGS, Sphaeropteris, trnG-tnrR IGS
National Category
Biological Systematics
URN: urn:nbn:se:uu:diva-162130DOI: 10.3732/ajb.94.5.873ISI: 000249830400018OAI: oai:DiVA.org:uu-162130DiVA: diva2:459029
Available from: 2011-11-24 Created: 2011-11-24 Last updated: 2011-11-24

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Korall, Petra
In the same journal
American Journal of Botany
Biological Systematics

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 187 hits
ReferencesLink to record
Permanent link

Direct link