Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 66, Issue 3, Pages 953-959Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2012.11.027
Keywords
Neotropical diversity; Bayesian analysis; BEAST; Divergence dating; Ancestral area reconstruction
Funding
- Robberson Research & Creative Endeavors Grant
- University of Oklahoma Graduate Student Senate
- Loren G. Hill Excellence in Zoology Fund
- University of Oklahoma Department of Zoology
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
- Fundacao de Amparo a Pesquisa do Estado do Rio Grande do Sul, Brazil
- US National Science Foundation [DEB-9200779, DEB-9505518, DEB-0415430]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - CAPES
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPq
- Fundacao de Apoio a Pesquisa do Distrito Federal - FAPDF
- Division Of Environmental Biology
- Direct For Biological Sciences [1136590] Funding Source: National Science Foundation
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Inferring the evolutionary and biogeographic history of taxa occurring in a particular region is one way to determine the processes by which the biodiversity of that region originated. Tree boas of the genus Corallus are an ancient clade and occur throughout Central and South America and the Lesser Antilles, making it an excellent group for investigating Neotropical biogeography. Using sequenced portions of two mitochondrial and three nuclear loci for individuals of all recognized species of Corallus, we infer phylogenetic relationships, present the first molecular analysis of the phylogenetic placement of the enigmatic C cropanii, develop a time-calibrated phylogeny, and explore the biogeographic history of the genus. We found that Corallus diversified within mainland South America, via over-water dispersals to the Lesser Antilles and Central America, and via the traditionally recognized Panamanian land bridge. Divergence time estimates reject the South American Caribbean-Track as a general biogeographic model for Corallus and implicate a role for events during the Oligocene and Miocene in diversification such as marine incursions and the uplift of the Andes. Our findings also suggest that recognition of the island endemic species, C. grenadensis and C. cookii, is questionable as they are nested within the widely distributed species, C. hortulanus. Our results highlight the importance of using widespread taxa when forming and testing biogeographic hypotheses in complex regions and further illustrate the difficulty of forming broadly applicable hypotheses regarding patterns of diversification in the Neotropical region. (C) 2012 Elsevier Inc. All rights reserved.
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