Ancylastrum

Ancylastrum is a genus of air-breathing freshwater limpets, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies.

Species
The genus Ancylastrum includes the following species:
 * Ancylastrum cumingianum (Bourguignat, 1853) - Australian freshwater limpet
 * Ancylastrum irvinae (Petterd, 1888)
 * Species inquirenda:
 * Ancylastrum dextrorsum Clessin, 1907
 * Ancylastrum issykulense Clessin, 1907
 * Ancylastrum ovatum Clessin, 1907
 * Ancylastrum turkestanicum Clessin, 1907