Median-joining network (MJN) constructed showing the relationships among the H. lar haplotypes. Each circle size is proportional to the number of individuals in each haplotype. The numbers next to the nodes correspond to the haplotype designation as listed in Supplementary Material, Table S1. The lines connecting the haplotypes represent single mutations unless indicated otherwise (numbers in parentheses). Hypothetical haplotypes (median vectors) are represented by white circles.