Solid shell, but thin, up to about 6 cm in length. Shell not glossy and grey, light yellow or light brown in colour. Surface of shell is sculptured with irregular concentric lines. Pallial sinus relatively deep and its edge is partially confluent with the pallial line.
Key identification features
- Possesses internal ligament or chondrophore
- No lateral teeth
- Relatively coarse sculpture of concentric rings on shell surface
Ecology and behaviour
Burrows to a depth of about 25cm in clay or soft mud often generally in areas of reduced salinity such as fjords or estuaries. Often occurs in great abundances.
Distribution and status
Common. From Norwegian Sea and Baltic down to the Iberian Peninsula and into the Mediterranean.