Fig. 5

Phylogenetic tree of all amphibians studied inferred using ML method based on the nucleotide dataset of 13 mt PCGs. The tree divides extant amphibians into three major taxa (orders): Gymnophiona, Caudata and Anura (including Neobatrachia) and the number of sampled species are shown in brackets. We have marked the branches of the species with rearrangements and species names only involved with PCGs rearrangements in dark red, names of species with rare arrangement are marked with an asterisk, and a pale red background is given to Neobatrachia, the group with the most intensive rearrangements. The middle pie chart shows the proportion of sampled amphibian species with mt gene rearrangements