DSC_1708 Large trough clam, or whangai karoro (Spisula discors) live animal with siphon extended. Buried in clean sand off open coasts, and usually found on slightly less exposed beaches than the Surf clam (Spisula murchisoni). Shell colour usually white with a straw coloured periostracum. Warrington *
DSC_2393 Large trough clam, or whangai karoro (Spisula discors) detail of smooth surface on the lateral teeth of the hinge, which distinguished it from the almost identical Surf clam (S. murchisoni). Buried in clean sand off open coasts, and usually found on slightly less exposed beaches than the Surf clam. Shell colour usually white with a straw coloured periostracum. Warrington *
DSC_1693 Oval trough clam, or ruheruhe (Spisula murchisoni) live animal with siphon extended. Buried in clean sand off very exposed coasts. Distinguished from the almost identical Large trough clam (S. discors) by fine traverse ridges on the lateral teeth of the hinge. Shell colour usually white with a straw coloured periostracum. Caroline Bay, Timaru *
