Phylogeography of a widespread small carnivore, the western spotted skunk () reveals temporally variable signatures of isolation across western North America.

We analyzed phylogeographic patterns in the western spotted skunk, Merriam, 1890 (Carnivora: Mephitidae) in relation to historical events associated with Pre-Pleistocene Divergence (PPD) and Quaternary climate change (QCC) using mitochondrial DNA from 97 individuals distributed across Western North America. Divergence times were generated using BEAST to estimate when isolation in putative refugia occurred. Patterns and timing of demographic expansion was performed using Bayesian skyline plot.