Figure 3

mtDNA phylogenetic relationships obtained by Bayesian inference analysis for the Palmorchestia populations. Values above nodes correspond to posterior probability values greater than 0.85. Branch colour coding in the tree shows parsimonious character optimization for habitat (blue, epigean; red, hypogean) assuming irreversibility. Bars to the right indicate the statistical parsimony mtDNA network membership, with blue bars corresponding to networks of pure P. epigaea haplotypes, red bars to networks of P. hypogaea haplotypes and the blue-red to the networks including haplotypes from both P. epigaea and P. hypogaea populations. The numbered nodes were used for age dating using a relaxed clock.