| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Clypeaster australasiae | (Gray, 1851) | accepted name | Yes | senior synonym |
new combination |
| Echinanthus testudinarius | Agassiz, 1872 | synonym | No | junior synonym |
original combination |
| Plesianthus testudinarius | Gray, 1851 | synonym | No | junior synonym |
original combination |