The shells are relatively thick, and wedge-shaped, with a polished periostracum. The muscular foot is used by the clam to dig rapidly back into the sand when the clam is exposed by the waves. The bean ...

The Periostracum is silky, scarcely glossy. In colour it is whitish to grey-brown and often the shell is coated with reddish-brown deposits. The shell is of similar shape to Sphaerium novaezelandiae ...

Oxidative Stress: Neuropathy, Excitability, and Neurodegeneration.

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Male Butterfly mussels are more compressed and larger, usually measuring less than 4.3 inches (110 mm) in length. The unique shell is triangular in shape. The periostracum (outer shell surface) is ...