clade Hypsogastropoda Parafossarulus is a genus of freshwater snails with gills and an operculum, an aquatic prosobranch gastropod mollusks in the family Bithyniidae. == Species == Species within the genus Parafossarulus include: == Taxonomy == Glöer (2002) reassigned two European extinct species of Parafossarulus into a subgenus of the genus Bit...