Oncomelania

Oncomelania
Oncomelania hupensis
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Pomatiopsidae
Subfamily: Pomatiopsinae
Genus: Oncomelania
Gredler, 1881
Diversity
2 species

Oncomelania is a genus of very small tropical freshwater snails, aquatic gastropod mollusks in the family Pomatiopsidae.

These Oncomelania snails are distantly related to the marine periwinkle, and more closely related to the small marine snails of the family Rissoidae.