Fig. 5

Phylogenetic networks based on DNA sequence comparisons of a COI fragment from E. verrucosus, E. cyaneus and G. lacustris specimens from sampling points at the western shore of Lake Baikal from the entire stretch from Listvyanka bay (northern shore of the Angara River outflow) up to Severobaikalsk and at Olkhon and Bolshoy Ushkaniy islands. The scale bars indicate the numbers of substitutions per base pair (the scale is identical for all species). The network with G. lacustris sequences also contains COI fragments from specimens from a pond on Olkhon Island (AY926671.1) [16]; from Xinjiang, China (JF965916.1) [63] and from Yellowstone Lake, USA (GU066811.1) [61]. Maps based on freely available cartographic material from Natural Earth (see Materials and Methods)