FIRST DATA OF ITS1-GENOTYPING OF THE BLACK SEA TREMATODES <i>CAINOCREADIUM
Data of genetic analysis of the Black Sea trematodes of <i>Cainocreadium</i> genus and <i>Helicometra fasciata</i> were obtained for the ﬁrst time. The nucleotide sequences of ITS1 rRNA gene cluster of <i>Cainocreadium ﬂesi</i> from <i>Platichthys ﬂesus</i> (GenBank entries MG980645, MG980646) and <i>Cainocreadium</i> sp. from <i>Gaidropsarus mediterraneus</i> (MG980643, MG980644, MK248037, MK248038) oﬀ Crimean Black Sea coast were found to be identical. Nevertheless, they have not been synonymized because of morphological diﬀerences known between these hostal morphs. Sequences of <i>Cainocreadium</i> from the Black Sea ﬁsh turned out to diﬀer, by 4 positions, from similar sequences of a closely related Mediterranean congener, <i>C. labracis</i> (cercaria). Five insertions-deletions and 38 nucleotide sequences distinguish the ITS1 sequences of the Black Sea trematodes, <i>C. ﬂesi</i> and <i>Cainocreadium</i> sp., from ITS1 sequences of another Mediterranean congener, <i>C. dentecis</i>. The ITS1 sequences of the Black Sea and Mediterranean <i>Helicometra fasciata</i> samples also diﬀer: 5 nucleotide changes and 11 insertions-deletions were identiﬁed. Supplementary data associated with this article can be found in online version at https://doi.org/10.21072/mbj.2018.03.4.04.