[Morphology of monogeneans parasitizing Amur River fish].

Morphology of Bivaginagyrus obscurus from Pseudorasbora is described. B. obscurus differs from species of the genus Dacfylogyrus by 2 vaginae, shape of median hooks, seat of gill filament and length of additional ventral bar. Morphology of Silurodiscoides infundibulavagina and some other species of this genus parasitic on Parasilurus asotus is described. The morphology of Pseudoancylodiscoides from Pseudobagrus fulvidraco is characterized by 2 ventral bars and peculiar seminal vesicle. Morphology of Bychowskyella pseudobagri from Pseudobagrus fulvidraco is described. The testis in this type species is located more ventrally than the ovary.