@ARTICLE{TreeBASE2Ref20097, author = {Nelsy R Pinto-S?nchez and Roberto Iba?ez and Santiago Madri??n and Oris I Sanjur and Eldredge Bermingham and Andrew J. Crawford}, title = {The Great American Biotic Interchange in frogs: multiple and early colonization of Central America by the South American genus Pristimantis (Anura: Craugastoridae)}, year = {2012}, keywords = {Ancestral area reconstruction, DEC, Isthmus of Panama, Multi-locus molecular phylogenetics, Terrarana}, doi = {}, url = {http://}, pmid = {}, journal = {Molecular Phylogenetics and Evolution}, volume = {}, number = {}, pages = {}, abstract = {The completion of the land bridge between North and South America is believed to have taken place 3.5?3.1 million years ago (Ma) and initiated a tremendous biogeographic event known as the Great American Biotic Interchange (GABI), described principally from the mammalian fossil record. The history of biotic interchange between continents for taxonomic groups with poor fossil records, however, is not well understood. Molecular and fossil data suggest that a number of plant and animal lineages crossed the Isthmus of Panama well before 3.5 Ma, leading biologists to speculate about trans-oceanic dispersal mechanisms. Here we present a molecular phylogenetic analysis of the frog genus Pristimantis based on 189 individuals of 137 species, including 71 individuals of 31 species from Panama and Colombia. DNA sequence data were obtained from three mitochondrial (COI, 12S, 16S) and two nuclear (RAG-1 and Tyr) genes, for a total of 4074 base pairs. The resulting phylogenetic hypothesis showed statistically significant conflict with most recognized taxonomic groups within Pristimantis, supporting only the rubicundus Species Series, P. myersi and P. pardalis Species Groups as monophyletic. Inference of ancestral areas based on a likelihood model of geographic range evolution via dispersal, local extinction, and cladogenesis (DEC) suggested that the colonization of Central America by South American Pristimantis involved at least eleven independent events. Relaxed-clock analyses of divergence times suggested that at least eight of these invasions into Central America took place before 3.5 Ma, mainly in the Miocene. These findings contribute to a growing list of molecular-based biogeographic studies presenting apparent temporal conflicts with the traditional GABI model.} }

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