RareDistributed from Denmark to the Iberian Peninsula and into the Mediterranean.
- Hinge has 10-20 teeth in a slight curve
- Round or oval shell
- The margin is smooth
Solid shell up to 1.5cm in length. It is dirt white in colour with yellow-brown perisostracum. The inside of the shell is white. The surface is sculptured with fine concentric ridges and very fine radiating lines.