Whitlock, Barbara , Wilkins, Carolyn F. .
Molecular phylogeny of Keraudrenia and Seringia (Malvaceae):evidence of a rapid radiation in Western Australia.
Species of Keraudrenia and Seringia are widely distributed in Australia, with one species occurring in Madagascar. Results of a molecular phylogenetic analysis of 18 taxa of Keraudrenia and Seringia using sequences from five chloroplast markers (ndhF, trnL,trnL-trnF, trnH-psbA, and psbB-psbH) and one nuclear gene (vicilin) confirm that species of Keraudrenia and Seringia form a well supported clade but do not support the continued recognition of them as separate genera. The most recent common ancestor of the Keraudrenia/Seringia clade is reconstructed as occurring in eastern Australia. All specimens sampled from Western Australia are recovered as a single recent radiation, presumably occurring since the aridificiation of Australia. The Malagasy species, Keraudrenia macrantha, is closely related to the eastern Australian K. hillii, and is the result of long distance dispersal. Additional sampling of species and populations, especially within central Australia, may reveal more complicated biogeographic patterns.
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1 - University Of Miami, Department Of Biology, P.O. Box 249118, CORAL GABLES, FL, 33124-0421, USA
2 - Western Australian Herbarium, Locked Bag 104, Bentley Delivery Centre, Perth, WA, 6983, Australia
Presentation Type: Oral Paper:Papers for Topics
Location: Franklin B/Hyatt
Date: Tuesday, July 10th, 2012
Time: 3:45 PM