Key identification features
- Ribs are continuous over the shell surface
- Decussate effect? on shell surface caused by more than 60 radiating ribs and 11-15 concentric ridges
Taxon version key
Fragile, plump, shell up to 3mm in length. It is white in colour both inside and out but the inside is pearly. The periositracum is pale green. The surface of the shell is sculptured with ribs and ridges.