| phylogeography and demography of guianan harlequin toads (atelopus): diversification within a refuge. | we investigated the genetic structure of populations of guianan harlequin toads (genus atelopus) and their evolutionary affinities to extra-guianan congeners. phylogenetic analysis of mitochondrial cytochrome b (cyt b) and nadh dehydrogenase subunit 2 (nd2) gene sequences produced well-supported clades largely corresponding to the four recognized taxa in the guianas (atelopus spumarius hoogmoedi, atelopus spumarius barbotini, atelopus franciscus, and atelopus flavescens). our findings suggest th ... | 2005 | 16101771 |