Zethalia

Zethalia is a genus of sea snails in the subfamily Umboniinae of the family Trochidae, the top snails, first formally named in 1918.

Species
There is one extant (still living) species and two extinct species within the genus Zethalia:
 * †Zethalia coronata Marwick, 1948
 * †Zethalia russelli Marwick, 1965
 * Zethalia zelandica (Hombron & Jacquinot, 1855)