Geographic distribution, phylogenetic relationships and admixture between Sus lineages. (A) A map of Island and Mainland Southeast Asia depicting the modern distributions of five Sus species. The grey shaded area represents the maximum geographical extent of Sundaland during periods of low sea level. (B) Phylogenetic relationships among Sus species inferred from nuclear DNA. Node labels show age in millions of years and 95% confidence interval. Grey shading highlights taxa living on Sundaland (C,D) Diagrams depicting the excess derived allele sharing when comparing sister taxa and outgroups. Each row contains the fraction of excess allele sharing by a taxon (left/right) with the top label/outgroup (S. scrofa or S. barbatus) relative to its sister taxon (left/right). The grey bar points in the direction of the taxon that shares more derived alleles with the outgroup than its sister taxon, and its magnitude indicates the amount of excess (D). Black bars represent 1 standard error and stars indicate D values significantly different from 0 (P < 0.01; see Materials and methods). (E) A mitochondrial DNA Bayesian phylogenetic-based tree with node labels that represent posterior probabilities (* > 0.85; ** = 1).