Cochran, Alyssa , Prado, Jefferson , Schuettpelz, Eric .
Tryonia, a new taenitidoid fern genus segregated from Jamesonia and Eriosorus (Pteridaceae).
The Neotropical fern genera Eriosorus and Jamesonia have long been thought of as close relatives. Molecular phylogenetic studies have confirmed this notion but have also revealed that neither genus is monophyletic with respect to the other. As a result, all known species of Eriosorus were recently subsumed under the older generic name Jamesonia. Here, through an analysis of a four-gene plastid dataset, we show that several species traditionally treated in Eriosorus are in fact more closely related to other taenitidoid fern genera than they are to the large Jamesonia sensu lato clade. A new genus, Tryonia, is thus described to accommodate these species. Tryonia is confined to southeastern Brazil and adjacent Uruguay. It is distinct from most species of Jamesonia in having stramineous rachises.
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1 - University Of North Carolina Wilmington, Department Of Biology And Marine Biology, 601 South College Road, Wilmington, NC, 28403-5915, USA
2 - Instituto de Botânica, Caixa Postal 68041, São Paulo, SP, 04045-972, BRAZIL
3 - Smithsonian Institution, Department of Botany (MRC 166), National Museum of Natural History, PO Box 37012, Washington, DC, 20013-7012, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Pines North/Boise Centre
Date: Monday, July 28th, 2014
Time: 2:15 PM
Candidate for Awards:Edgar T. Wherry award