Heterocyclus

Heterocyclus is a genus of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Tateidae.

Species
Species within the genus Heterocyclus include:
 * Heterocyclus perroquini (Crosse, 1872)
 * Synonyms:
 * Heterocyclus petiti (Crosse, 1872) : synonym of Heterocyclus perroquini Crosse, 1872