Comparison of mitochondrial genome organisation amongst focal species. Genes with conserved positions are shown in greyscale, translocated genes are coloured. Genes encoded on the plus-strand point towards the right, while the ones encoded on the minus-strand point towards the left. Invasive Ponto-Caspian species are shown with dashed lines. The cladogram on the left represents a summary of phylogenetic relationships from Fig. 3. The putative pancrustacean ground pattern is adapted from Stokkan et al. (2016).