Fig. 6

Phylogenetic network (left) based on a 18S rDNA sequence fragment from E. verrucosus specimens from sampling points in the southern, western and eastern regions of Baikal and photographs of E. verrucosus specimens from each haplotype from respective sampling points (right). Note the differences in the shape of the stripes on the closeup images of the dorsal crest (the first three segments are displayed). The scale on the photographs of the entire specimens is identical; the sizes of the photographed individuals are not representative for the individuals of the respective haplotypes. The scale bar of the network indicates the number of substitutions per base pair. The network comprises the data from seven samples from the western (including sequence AY926773.1) [16], five samples from the southern and two samples from the eastern regions of Lake Baikal. See Additional file 6: Figure S3 for the maximum likelihood tree of these sequences. Maps based on freely available cartographic material from Natural Earth (see Materials and Methods)