Turritellidae – Turritellinae: Colpospira (Ctenocolpus) australis (Lamarck, 1822) (‘southern screw-shell’)

Synonym(s): australis Lamarck, 1822 granulifera Tenison-Woods, 1876 terebellata Tate, 1893 diffidens Iredale, 1925.

Typical shell-length 20 mm. Lives subtidally and offshore on sand, especially in exposed environments. Native. Endemic to southeastern Australia (NSW, TAS, VIC and SA). In Tasmanian waters, this is a widespread species but only common as a beached shell in a few locations, particularly on the E coast.