The shell of an adult Glycymeris nummaria can be as large as 60 millimetres (2.4 in). It is quite thick, almost circular in shape, with a sculpture of radiating striae and fine concentric lines. The surface is dull and may be dark or pale brown, but also whitish-yellowish. Inside of the shell is glossy, white or pale yellow, often with irregular brown markings.
Distribution and habitat
This species is widespread from Norway to the Mediterranean Sea. It lives in sandy-muddy gravels offshore to depths of about 100 metres (330 ft).
- Melita Peharda, Marija Crnčević, Ivana Bušelić, Chris A. Richardson and Daria Ezgeta-Balić - Growth And Longevity of Glycymeris nummaria (Linnaeus, 1758) from the Eastern Adriatic, Croatia
- Species Identification
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