Timoshkin, O. A.; Lukhnev, A. G.; Zaytseva, E. P. (2010). First data on the endemic fauna of Turbellaria Proseriata (Platyhelminthes, Otomesostomidae) from Lake Baikal. Biology Bulletin. 37(9): 861-875.

199696

10.1134/s1062359010090013 [view]

Timoshkin, O. A.; Lukhnev, A. G.; Zaytseva, E. P.

2010

37(9): 861-875

Publication

This is the official translation of the Russian version of the same article published with the same authors (2010) in Zoologicheskii Zhurnal 10: 1165–1180

Available for editors  

Illustrated descriptions of the representatives of the new genus Baikalotomesostoma and two new species of Turbellaria Proseriata from Lake Baikal are given. The pattern of their morphological organization allows considering them as representatives of the Otomesostomidae family. The most important generic character of the new genus is the presence of another (the third one) sexual opening (continuing into the blint, sack-shaped organ — bursa?) located between the male and female sexual openings. According to the morphological structure, the second new species is a true representative of the Otomesostoma genus, but it is a real giant among freshwater Proseriata. This discovery of the new species and the new genus, having such a peculiar morphological structure, should be considered as evidence of the existence of another endemic species flock of free-living flatworms — Turbellaria Proseriata. Evidently, the new taxa of Lake Baikal are closely related to the Holarctic Otomesostoma auditivum Du Plessis 1874.

Lake Baikal

Systematics, Taxonomy

Platyhelminthes

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