| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Echinus diadema | Studer, 1876 | synonym | No | senior synonym |
original combination |
| Psammechinus diadema | (Studer, 1876) | synonym | No | senior synonym |
new combination |
| Sterechinus diadema | (Studer, 1876) | accepted name | Yes | senior synonym |
new combination |