Brittle shell up to about 2cm in length. White or pale yellow in colour sometimes with pink or red-brown radiating rays. Inside of shell is polished and tinged with orange. Exterior of shell is sculptured with prominent concentric ridges.
- Lower margin of pallial sinus not confluent with pallial line
- Brittle oval shell
- Arcopagia crassa has a much thicker shell
Burrows in fine sand where it feeds on organic detritus picked up through the siphon.
Recorded from Britain south to the Iberian Peninsula and into the Mediterranean.