Fig. 2

World maps showing the described collection locations of samples (small circles inside gray boxes) and the relative proportions of three (a) or five (b) inferred populations as determined in our ADMIXTURE analysis (large circles), using four-fold degenerate sites. Each sample’s taxonomic designation was based on that reported in the literature (see Table 1, Additional file 1: Table S1). For the ADMIXTURE results the proportion of each color in the circle corresponds to the amount of cluster-associated ancestry. Note that for our sample designations, we defined five broad geographical regions, indicated on the map by the dashed gray boxes