| Pomatiopsidae, Hydrobiidae, Physa, Biomphalaria, Pomacea|
Idiopyrgus is a genus of freshwater snails with gills and an operculum, aquatic gastropod mollusks in the family Pomatiopsidae.
The distribution of the genus Idiopyrgus includes Brazil.
Species within the genus Idiopyrgus include:Idiopyrgus pilbryi F. Baker, 1913
Idiopyrgus souleyetianus Pilsbry, 1911 - type species
Idiopyrgus walkeri Pilsbry, 1924
Malek (1983) noted that Idiopyrgus pilbryi and Idiopyrgus walkeri were described from shells only, but should stay valid until the anatomy of the soft parts is also elucidated.