| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Echinus acutus | Lamarck, 1816 | synonym | No | senior synonym |
original combination |
| Echinus norvegicus | Düben & Koren, 1846 | synonym | No | junior synonym |
original combination |
| Gracilechinus acutus | (Lamarck, 1816) | accepted name | Yes | senior synonym |
new combination |