| cryptic neogene vicariance and quaternary dispersal of the red-spotted toad (bufo punctatus): insights on the evolution of north american warm desert biotas. | we define the geographical distributions of mitochondrial dna (mtdna) lineages embedded within a broadly distributed, arid-dwelling toad, bufo punctatus. these patterns were evaluated as they relate to hypothesized vicariant events leading to the formation of desert biotas within western north america. we assessed mtdna sequence variation among 191 samples from 82 sites located throughout much of the species' range. parsimony-based haplotype networks of major identified lineages were used in nes ... | 2005 | 16101772 |