title: [The determination of the species classification of Baikal planarian cocoons found in the stomach of the black grayling (Thymallus arcticus baicalensis) by a comparative analysis of the nucleotide sequences of the ribosomal RNA gene].
abstract: Comparative analysis of nucleotide sequences of gene 18S of ribosome RNA was carried out. The results show that the genetic sequences of the given locus could be used as a molecular marker to identify the species of planaria irrespective of ontogenetic stage. The articles deals with problem of specific determination of cocoons of Baikal planaria from the stomach of Baikal black grayling using comparative analysis of nucleotide sequences of ribosome RNA fragments with known sequences determined earlier for Baikal planaria. The cocoons belong to two species of Rimacephalus. The authors discuss also the importance of feeding relationships of planaria and benthophage fish to investigate the biotic factors that influence the evolution of Baikal planaria.
authors.affiliation: Limnological Institute, Russian Academy of Science, Siberian Branch, Irkutsk, Russia.
authors.forename: K D
authors.initials: KD
authors.lastname: Kuznedelov
authors.forename: E V
authors.initials: EV
authors.lastname: Dziuba
mesh_terms: D000818:Animals; D001483:Base Sequence; D020459:Genes, rRNA / Q000235:genetics*; D008018:Life Cycle Stages / Q000235:genetics*; D008969:Molecular Sequence Data; D010932:Planarians / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D012487:Salmonidae / Q000469:parasitology*; D012800:Siberia; D013270:Stomach / Q000469:parasitology*
chemical_list: D012337:RNA, Ribosomal, 18S