Lottiidae – Lottiinae: Notoacmea petterdi (Tenison-Woods, 1876) (‘Petterd’s limpet’)

Synonym(s): petterdi Tenison-Woods, 1877.

Typical shell-length 20 mm. Shell patterning relatively invariant; underside white with narrow, dark margin. Lives intertidally attached to rocks, generally on overhangs, and especially on moderately exposed shores. Native. Endemic to southern and eastern Australia (QLD, NSW, TAS, VIC and SA). In Tasmanian waters, this is a widespread and often common species, though less so as a beached shell.