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Bryological and Lichenological Section/ABLS

Camara, Paulo [1], Magill, Robert E. [1].

A revision of the genus Dimerodontium (Bryophyta) with considerations about familiar position using cpDNA.

The genus Dimerodontium was firstly described by William Mitten in his work entitled "Musci Austro Americani" in 1869. Between the year 1877 and 1956, a total of 14 names were added to this genus. Even though the genus has some characters distinct from Fabroniaceae, its original familiar position was never challenged. For the first time a comprehensive study including a monograph of the genus and molecular phylogeny based on cpDNA is presented. A new definition of the genus is proposed with three species D. mendozense Mitt., D. pellucidum Mitt. and D. balansa Müll Hal. Eleven new synonyms are also presented. New rbcL sequences were obtained for the genus Dimerodontium and Fabronia, the remaining sequences used in the study were downloaded from the GenBank. Data were analyzed under maximum parsimony and maximum likelihood criteria using PAUP 4.0.b10. Results under both criteria do not support a monophyletic Fabroniaceae as traditionally circumscribed; Dimerodontium appears as sister group of a clade containing Fabronia, Gollania, Abietinella, Stereophyllum and Entodontopsis.

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1 - Missouri Botanical Garden, Po Box 299, St Louis, Missouri, 63166-0299, USA


Presentation Type: Poster
Session: 33-2
Location: Salon C, D & E - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 12:30 PM
Abstract ID:211

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