Diphyoropa saturni

Diphyoropa saturni, also known as the Sydney copper pinwheel snail, is a species of pinwheel snail that is endemic to eastern Australia.

Description
The shell of mature snails is 1.6–1.8 mm in height, with a diameter of 3.2–3.5 mm, discoidal with a flat to slightly sunken spire, with rounded whorls, impressed sutures and widely spaced radial ribs. It is uniformly coppery-brown in colouration. The umbilicus is widely open. The aperture is ovately lunate. The animal has a white body.

Distribution
The snail has a natural range extending from south-eastern Queensland to south-eastern New South Wales. It has been introduced to Victoria and Lord Howe Island.