Phylogenetic relationships among Zootoca vivipara mtDNA haplotypes. (A) Bayesian phylogram based on the concatenated dataset (ND2 + cyt-b, 1370 bp). Node support values correspond to posterior Bayesian. (B) Statistical parsimony network of mtDNA haplotypes, where each circle represents a haplotype and its size is proportional to the haplotype’s frequency. Branches represent one nucleotide change, black dots indicate additional changes or missing haplotypes, and black squares indicate the number of changes when greater than 4 (branch lengths not drawn to scale). Colours correspond to clades in (A).