Graphical scheme of mutation sites within the contiguous sequences of the small rRNA gene subunit (ssrDNA), the large rRNA gene subunit (lsrDNA) and the internal transcribed spacers 1 and 2 (ITS1 and ITS2 rDNA) of Dibothriocephalus dendriticus and Dibothriocephalus ditremus based on sequences presented in Supplementary Table 1. ITS2 sequences published by Rozas et al., 2012 (468 bp) were used as the reference sequence. The length of ITS2 spacer varied from 464 bp to 480 bp due to different number of repetitive motifs and insertions/deletions.