Time-calibrated Bayesian phylogenetic tree inferred from mitochondrial COI sequences. The divergence times are depicted as median values and 95% HPD intervals. Circles on nodes represent clade support (Bayesian posterior probabilities, PP) as shown in the figure. 15 groups revealed by species delimitation are shown as well as employed haplotypes (details are provided in Tab. S1). Further, the names of branchiobdellid species are provided next to branches. Nodes A and B represent calibration points: A – the split of North American and European Astacids, and B – the split of Au. torrentium and Au. pallipes s.l.