Ref ID : 3452
A.S. Bogoslovsky; [Two new Rotifer-species - Paradicranophorus verae, sp. n. and Lecane chankensis, sp. n.]. Zoologichyeskiy Journal XXXVII(4):622-624, 1958
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Paradicranophorus verae, sp. n. found by V.A. Brotzkaya (1950) in the sand littoral of the isle Ryaxhkov, in the White Sea. Only one species, P. hudsoni (Glaskott) was hitherto known in this genus. The finding of the second species described below will enable to define more precisely generic characteristics referred by J. Wiszniewski (1929) and to distinguish specific ones. Generic characters are the following: body pyriform, cuticle sticky, the leg situated on the abdominal side, long excretory ducts of salivary glands present, viviparity, and benthal mode of life. Specific characters of P. hudsoni are the following: cuticle with deep transversal folds and less drastically manifested longitudinal ones, rostrum small, submentum unexpressed, toes short, dwells in the silt of freshwaters. Specific characters of P. verae: cuticle smooth without folds, large rostrum, submentum present, toes long, dwells in the sand of marine littoral. Lecane chankensis, sp. n. found in a plankton sample of the Lake Khanka in the collections of the Amur expedition, 1945-1949. Closely related to L. triloba described in Japan by K. Yamamoto (1951), but the size and form of the dorsal plate, character of the anterior margin of the abdominal one, situation of the second joint of the leg and the structure of coaxal plates differ considerably in the above two species. The type is to be found in the collections of Biological Laboratory of Biological-Pedological Faculty of Moscow State University.