Thin shell up to 6mm in length. The shell is white in colour but obscured by cream coloured periostracum. The surface of the shell is sculptured with radiating ribs (the largest of which is the niddle one) and concentric lines.
Key identification features
- The shell is symmetrical around the beak.
- Surface is sculptured with less than 24 radiating ribs
Ecology and behaviour
Lives on mud, sand or gravel bottoms where it feeds by filtering phytoplankton.