Rhytida australis is a species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.
This species is endemic to Stewart Island in New Zealand. They are also in Native Island, which is an island off the east coast of Stewart Island.
The dimensions of the eggs of Rhytida australis are 2.75 ÃÂ 2.25, 2.75 ÃÂ 2, 2.75 ÃÂ 2.25 mm.