Bythinia manchourica Gerstfeldt – Bourguignat, 1860 Parafossarulus manchouricus is a species of freshwater snail with gills and an operculum, an aquatic prosobranch gastropod mollusk in the family Bithyniidae.

This species is medically important as a host for the liver fluke Clonorchis sinensis in East Asia.

[3][4] This species occurs in: Russia (Amur River basin),[5] Japan (Honshū, Kyushu and Shikoku), Korea, Taiwan[6] and China.

[7] The type locality is the Amur River and other rivers in the southern Siberia ("le fleuve Amour et divers cours d'eau de la Sibérie méridionale").

[1] Parafossarulus manchouricus lives in shallow ponds and in irrigation channels.