Fig. 1

Maximum likelihood (ML) phylogenetic tree of Anguis species and their distributions in the Balkans based on a fragment of mtDNA (ND2). Anguis veronensis (in white) occurs outside the area studied here. Numbers at nodes show Bayesian posterior probabilities and ML bootstrap support values. Yellow lines denote contact zones between two species. Numbers correspond to the locality numbers as given in Additional file 1: Table S1