Shell up to about 6 cm in length and white in colour. Surface is scupltured with concentric ridges and radiating ribs which form spines where they intersect. Periostracum light brown or straw coloured.
Key identification features
- Front magin rounded
- Finger like apophysis
Ecology and behaviour
Bores into peat, wood, mudstone, shale, slate, chalk, marl and sand. The borrows tend to be horizontal.
Distribution and status
Ranges from north Norway and the Baltic to the Iberian Peninsula and into the Mediterranean and Black Seas.
The map provided here shows the distribution of the species based on Conchological Society data.