Shell solid, somewhat triangular, up to about 4cm long. Dirty white, cream or pale yellow usually with three red-brown rays. Sculpture of numerous concentric ridges. Periostracum extremely slight and thin. Inside sometimes shows purple stain around the lunule. Inner margin of shell crenulate.
- Exterior of shell sculptured with numerous concentric ridges
- Three red brown rays on valve surface
Shallow burrower in clean or muddy sand where it feeds by filtering phytoplankton.
Very commonRecorded from the North of Norway to Iberian Peninsula and the Mediterranean and the Black Sea.