OccasionalDistributed from the English Channel south to the Mediterranean and Black Seas.
Lives attached by byssus threads amongst rocks or crevices.
- Ventral margin of the shell has no gape
- All teeth on the hinge plate are a similar size
Soid shell up to 2cm in length. It is yellow white in colour obscured by brown periostracum. The inside of the shell is white. The surface of the shell is sculptured with radiating ribs and ridges which gives rise to a reticulate appearance in the middle of the valves.