[The biology of the trematodes Nenimandijea kashmirensis and Pleurogenoides medians (Pleurogenidae)--parasites of frogs in the Maritime Territory].

The experimental study of life cycles of the trematodes Nenimandijea kashmirensis Kaw, 1950 and Pleurogenoides medians Olsson, 1876 was carried out. It was found out, that their life cycles include: the first intermediate host--the mollusc Boreoelona contortrix ussuriensis, the second intermediate host--dragonfly larvae of the genus Cordulia, and the final host--the frogs Rana nigrimaculata and R. semiplicata. Based on obtained data it is suggested, that Pleurogenoides japonicus (Yamaguti) should not be considered as a separate species.