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Evolutionary relationships of Calyptogena species (Bivalvia, Vesicomyidae) from Western Pacificтезисы доклада
- Авторы: Petrov N.B., Vladychenskaya I.P., Krylova E.M., Marshall B.A.
- Сборник: Molecular Phylogenetics. Contr. 2nd Moscow intern. conf. "Molecular phylogenetics"(MolPhy-2)
- Тезисы
- Год издания: 2010
- Первая страница: 144
- Последняя страница: 144
- Аннотация: The family Vesicomyidae comprises 115 species of highly-specialized bivalves symbiotic with chemoautotrophic sulphide-oxidizing bacteria. A global distribution and a high level of ecological isolation at separated habitats make vesicomyids a perspective group to study processes of speciation and dispersion in the deep sea. Eight of 10 recent species of the genus Calyptogena inhabit the Pacific Ocean. Four species: pacifica, rectimargo, fausta and tuerkayi were recorded in the N and SW Pacific. Putative novel species of the most distantly located population of Calyptogena was collected near New Zealand (off North Island, South Ritchie Trough). It was identified as C. tuerkayi, recorded only from the Edison seamount (SW Pacific, east of the island of New Ireland) and similar by morphology to C. fausta (Suruga Bay, Japan).To evaluate genetic difference between C. tuerkayi and other species of the genus, fragment of mitochondrial COI gene and nuclear ITS1and ITS2 were sequenced and analyzed together with homologous sequences acquired from the GenBank. The distance phylogenetic tree puts C. tuerkayi close to C. fausta, vesicomyids of mitotype II and III, and C. pacifica. The Kimura 2-p inter-group distances (0.018-0.207) exceed the intra-group values (0.002-0.022) confirming the accuracy of the phylogenetic grouping. These data reveal the close relationships between C. tuerkayi and C. fausta, however support the species status of C. tuerkayi. The New Zealand population of C. tuerkayi may be a result of recent dispersion from the NW Pacific.
- Добавил в систему: Петров Николай Борисович