The left side of the figure shows a map of southern South America (AR: Argentina; BO: Bolivia; BR: Brazil; PA: Paraguay; and UR: Uruguay), highlighting the distribution of the two morphotypes identified for Philodryas patagoniensis sensu lato. Grey circles represent the A-morphotype, while black circles denote the B-morphotype. Squares and rectangles indicate locations where genetic samples were collected, and their colours correspond with those on the right side of the figure. The right side of the figure displays the haplotype networks produced by the PopArt software for each gene, based on the number of variable sites in the sequences, revealing the presence of two distinct haplogroups. These correspond well with the A- and B- morphotypes and also show a strong geographic pattern.