Scaled likelihood trees.

<p>Scaled likelihood trees for a) Collared Pikas, b) Hoary Marmots, c) Singing Voles, d) Arctic Ground Squirrels, and e) Brown Lemmings. Beringian (above, blue) and east (below, red) lineages are depicted for all species. The northern lineage of Arctic Ground Squirrels is sister to the east-Beringian phylogroups. Pairwise net divergences (<i>Da</i> calculated in DnaSP; [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0118396#pone.0118396.ref061" target="_blank">61</a>]) are shown between phylogroups.