New Cnidaria Species in Saratov Oblast Waterbodies
(Povolzhye)

E. E. Sonina and Yu. A. Malinina

State Research Institute of the Lake and River Fish Industry, Saratov Department,
ul. Chernyshevskogo 152, Saratov, 410002 Russia

e-mail: MJul@rambler.ru

Received November 7, 2007

Abstract—Cnidaria species that were earlier unknown in the waterbodies of Saratov oblast have been found in
this region in the last decade. Colonies of Cordylophora caspia (Pallas, 1771) were found on stems of Phrag-
mites australis (Cav.) Trin. ex Steud. in the basin cooler of the Balakovo nuclear power plant (Saratov water
reservoir), while the freshwater jellyfish Craspedacusta sowerbii Lankaster, 1880 was found in the Saratovka
River (Volgograd water reservoir). It is possible that these species penetrate into waterbodies with foreign plants
or are introduced by birds. Another possibility is that their discovery is due to a more thorough examination of
the waterbodies' biota.

Key words: Cordylophora, colony, craspedacusta, medusoid stage, alien species.

DOI:10.1134/S1995082909020023

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