Chrysostoma

Chrysostoma is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.

Description
The solid, thick shell has a globose shape. The spire is very short. The aperture is rounded. The parietal wall bears a heavy callus which wholly or almost covers the narrow umbilicus.

Species
Species within the genus Chrysostoma include:
 * Chrysostoma paradoxum (Born, 1778)
 * Species brought into synonymy:
 * Chrysostoma zeus (Fischer, 1874) : synonym of Austrocochlea zeus P. Fischer, 1874