Ecology and behaviour
Lives partially buried in mud or gravel mixed with sand or mud.
Key identification features
- Surface has 25-55 concentric ridges
- Periostracum has concentric grooves
- Margin is initially smooth, becoming crenulate in older shells.
Taxon version key
Solid shell up to 2.5cm in length. The shell is white or pink in colour usually obscured by brown periostracum.