Rhytididae

Rhytididae is a taxonomic family of medium-sized predatory air-breathing land snails, carnivorous terrestrial pulmonate gastropod molluscs in the superfamily Rhytidoidea.

The New Zealand genera include Delos, Delouagapia, Paryphanta, Powelliphanta, Rhytida, Wainuia and Schizoglossa.

These, however, probably do not form a monophyletic group, as indicated by their differences in their size, shape and radular morphology.

[5] Genera within the family Rhytididae include: Eggs of New Zealand's species are generally deposited in leaf mould.

Eggs are usually laid from late October to early December, with exception in some species as Powelliphanta spedeni in March.

A shell of Powelliphanta hochstetteri hochstetteri .
Radulae of three species representing three Rhytidae genera. (A) Natalina beyrichi, scale bar = 1.0 mm; (B) Afrorhytida kraussi, scale bar = 500 μm; (C) Capitina calcicola sp., scale bar = 250 μm.