| Synonym | Autore | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Casmaria ponderosa | (Gmelin, 1791) | accepted name | Yes | senior synonym |
new combination |
| Casmaria ponderosa ponderosa | (Gmelin, 1791) | synonym | No | senior synonym |
new combination |
| Cassidea cernica | Sowerby, 1888 | synonym | No | junior synonym |
original combination |
| Cassis cernica | Sowerby, 1888 | synonym | No | junior synonym |
original combination |