Cardiidae – Trachycardiinae: Acrosterigma cygnorum (Deshayes, 1855) (‘oblique cockle’)

Synonym(s): cygnorum Deshayes, 1855.

Typical shell-length 40 mm. Shell with narrow outline, with or without pink mottling. Lives subtidally and offshore in sand, especially in moderately sheltered environments. Native. Endemic to southeastern and southwestern Australia (QLD, NSW, TAS, VIC, SA and WA). In Tasmanian waters, this species is not uncommon in the N, but rare or absent further S.