Figure 2: Geographic assessment of population genetic clustering of S. atlantis and S. hesperis using SNPs. Structure and TESS results (A) consistently indicate a major genetic divergence between northern and southern S. hesperis lineages. Populations of S. hesperis and S. atlantis identified in the K =6 Structure analysis are plotted as pie charts on the map in (B) to show correspondence between genetic and geographic structure. The COI haplotype network for the same specimens (C) depicts a lack of geographic structure in S. hesperis and haplotype sharing between S. hesperis and Nevadan S. zerene . Hatches along the branches in (C) indicate the number of nucleotide differences between sequences, and haplotype colours correspond to the Structure clustering and subclustering results in (A). Top right image: S. atlantis hollandi ; lower left image: S. hesperis beani . The dorsal wing surface is shown on the left side of each specimen, and the ventral surface is depicted on the right.