Trochidae – Fossarininae: Fossarina (Fossarina) petterdi Crosse, 1870 (‘Petterd’s fossarina’)

Synonym(s): petterdi Crosse, 1870 simsoni Tenison-Woods, 1876 mutabilis May, 1909.

Typical shell-length 5.0 mm. Lives intertidally amongst rocks and seaweed. Native. Endemic to southeastern Australia (TAS, VIC and SA). In Tasmanian waters, this is a widespread and often common species.