- The slipper shells ("cup & saucer" shells) are distinguished by a small shelf or cup on the inside, which protects the body of the mollusc. The family, Crepidulidae, is related to the Xenophoridae family.
- Classification
- Class: Gastropoda
- Subclass: Prosobranchia
- Order: Caenogastropoda
- Superfamily: Crepidulacea
- Family: Crepidulidae
- Major Genera
- Genus: Calyptraea
- Genus: Cheilea
- Genus: Crepipatella
- Genus: Crepidula
- Genus: Crucibulum
Crepidula onyx (Sowerby, 1824)
Onyx Slipper Shell