Wainuia urnula is a species of air-breathing predatory land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.

This species inhabits the North Island in New Zealand.

[1] Species is distinctively colorful with a large reddish patch in the umbilicus with the foot being of maroon color.

The diet of Wainuia urnula was found to contain amphipods (Parorchestia tenuis) in over 80% of snails sampled.

[2] Dimensions of a group of eggs of Wainuia urnula were: 5 × 4, 5 × 4, 5 × 4, 5 × 3.75, 4.5 × 3.5, 5.25 × 4.25 mm.