Trochidae – Monodontinae: Diloma concameratum (W. Wood, 1828) (‘tessellated top-shell’)

Synonym(s): concameratum Wood, 1828.

Typical shell-length 25 mm. Tessellated patterning characteristic, but dominant colour may be black, yellow or off-white. Lives intertidally amongst rocks and seaweed, especially on moderately sheltered shores. Native. Endemic to southeastern and southwestern Australia (NSW, TAS, VIC, SA and WA). In Tasmanian waters, this is a widespread and often common species.