Shell up to about 9cm in length and white in colour. Sculpture of concentric ridges folded at the anterior of the shell to create a very rough surface. Periostracum brown.
Key identification features
- Shell possesses a median groove
- Front margin draw out into a beak with very rough sculpture
Ecology and behaviour
Bores into peat, clay, shale, red sandstone, oolite or soft rock and rarely into wood.
Distribution and status
Distributed from Norway south to the Bay of Biscay.