| Abstract Detail
Systematics Section / ASPT Clark, John R. [1], Roalson, Eric [1]. A big genus in a big ocean: phylogeny, historical biogeography, and morphological observations of Pacific Cyrtandra (Gesneriaceae). CYRTANDRA J.R. & G. Forster (Gesneriaceae) is a large and diverse genus that spans nearly a quarter of the Earth’s circumference. As many as 600-1000 species have been estimated, although exact species counts are nebulous due to sparse collecting throughout its range. Centers of diversity include the Indo-Malayan region, Hawai’i, and the South Pacific. Fieldwork has been conducted in several major archipelagos in the Pacific, particularly, Hawai’i, Samoa, Fiji, and the Marquesas Islands. Our current analysis of nuclear ribosomal spacer, chloroplast spacer gene sequences, and partial analysis of newly characterized nuclear gene sequences, suggests a dynamic exchange of species among the South Pacific islands with west to east and subsequent east to west dispersal events. Historical biogeographic pattern reconstructions using Fitch Parsimony Optimization and the novel application of Posterior Mapping (using Bayesian inference) are compared. Additionally, notes on lineage synapomorphies are presented. Log in to add this item to your schedule
1 - Washington State University, School of Biological Sciences, Po Box 644236, Pullman, Washington, 99164-4236, USA
Keywords: Posterior Mapping phylogeography islands biogeography Lamiales Cyrtandroideae Cyrtandra Gesneriaceae .
Presentation Type: Poster:Posters for Sections Session: 48-195 Location: Auditorium/Bell Memorial Union Date: Tuesday, August 1st, 2006 Time: 12:30 PM Abstract ID:329 |