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Abstract Detail

Systematics Section

Paudyal, Sushil [1], Delprete, Piero [2], Motley, Timothy [1].

In out, in out: using total evidence to support treating Strumpfia maritima as a monotypic tribe in the Cinchonoideae (Rubiaceae).

Strumpfia maritima Jacq. is a morphologically distinctive species and the only member in the genus Strumpfia. It is a dwarf shrub with ericoid, broom-like branches, and occurring in littoral habitats in the Caribbean region ranging from South Florida to the Antilles and North Venezuela and from Yucatan peninsula of Mexico to the Bahamas. Various molecular studies have placed Strumpfia related to the genera of the tribes Chiococceae, Catesbaeeae, and some former members of the tribes Condamineeae and Cinchoneae of the Rubiaceae. The most recent tribal delimitation of the subfamily Cinchonoideae, based on molecular phylogenetic analyses, placed Strumpfia sister to the rest of the tribe and included it in the tribe while earlier studies had found similar phylogenetic relationships, but were reluctant to include Strumpfia in the Chiococceae. The earlier authors noted significant morphological differences between Strumpfia and the other genera of the tribe. Some scientists argue against creating monotypic tribes. Because including Strumpfia in the Chiococceae creates a group of genera no longer supported by a single synapomorphy, we decided to revisit the inclusion of Strumpfia in the Chiococceae sensu Manns and Bremer. We examined genetic divergences among the tribes of the subfamily Cinchonoideae using trnL-F data analyzed using both Maximum Parsimony and Bayesian Inference. Results from the present molecular data and morphology provide strong evidence for treating Strumpfia as a monotypic tribe.

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1 - Old Dominion University, Biological Sciences, 110 Mills Godwin Building, 45th Street W, Norfolk, VA, 23529, USA
2 - IRD - UMR AMAP, Herbier de Guyane, Boite Postale 165, 97323 Cayenne Cedex , Cayenne, French Guiana


Presentation Type: Oral Paper:Papers for Sections
Session: 33
Location: Lindell A/Chase Park Plaza
Date: Tuesday, July 12th, 2011
Time: 1:30 PM
Number: 33001
Abstract ID:111

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