Solid shell up to about 5cm in length. Cream, grey, light brown or yellowish in colour sometimes with rays, streaks or blotches of brown or purple. Sculpture of numerous concentric rings with fine radiating lines. Concentric ribs generally stronger on the posterior area of the shell. Each valve has three cardinal teeth; the centre tooth on the left valve and centre and posterior on the right valve bifid.
- Pallial sinus partially confluent with the pallial line
- Sculpture of concentric ridges crossed by delicate lines
Shallow burrower (up to 5cm deep) in sand or muddy gravel at the base of rcoks or dead shells to which it is generally attached by byssus threads. Feeds by filtering phytoplankton.
Recorded from the North of Nroway to the Iberian Peninsula and into the Mediterranean.