| discordant temporal and geographic patterns in maternal lineages of eastern north american frogs, rana catesbeiana (ranidae) and pseudacris crucifer (hylidae). | whether the pleistocene has had a disproportionate impact on the recent diversification of temperate species, or played a lesser role in a more protracted process, has been a prominent evolutionary debate for the past decade. we used cytochrome b sequences to reconstruct the evolutionary histories of two widely co-distributed, and ecologically divergent frogs (rana catesbeiana and pseudacris crucifer) to examine the role of the pleistocene in structuring these species. results for r. catesbeiana ... | 2004 | 15288057 |