Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

摘要: Analysis of mtDNA sequence variation (2,548 bp from ND2, cytb, and part the control region) indicates that genus Cyprinodon began diverging in Late Miocene a common ancestor with Megupsilon, monotypic on Mesa del Norte Mexico. The geographic pattern variation, estimates divergence time, suggests by end occurred Atlantic Coast West Indies to near western margin North America via ancestral Rio Grande Colorado River systems. Phylogeographic structure within major complexes supports variety hypotheses geology previous phylogenetic analyses for Neogene connections among basins southwestern now separated formidable barriers dispersal. Comparison tree inferences allozymes reticulate evolution involving divergent lineages probably was important history Cyprinodon.