See text Wainuia is a genus of air-breathing predatory land snails, terrestrial pulmonate gastropod molluscs in the family Rhytididae.

Species in this genus occur in New Zealand.

[1] The width of the shell of Wainuia is 21–38 mm.

[2] Species within the genus Wainuia include:[1] Species of the genus Wainuia are carnivorous.

Wainuia have eggs with a calcareous surface which lacks cuticle.