[Life cycle of a trematode Holostephanus nipponicus (Cyathocotylidae) in conditions of Primor'e].

Description of a life cycle and development stages of a trematode Holostephanus nipponicus Yamaguti, 1939 is given. Experimental studies have shown that in Primorye, the first intermediate host is commonly a snail Parafossarulus spiridonovi, and the second hosts are freshwater fishes Rhodeus sericeus sericeus and Pseudorasbora parva. Adult worms H. nipponicus were reared in a chicken.