| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| H. simplex | Kramp, 1928 | synonym | No | junior synonym |
original combination |
| Hydractinia minuta | (Mayer, 1900) | accepted name | Yes | senior synonym |
new combination |
| Podocoryne minuta | (Mayer, 1900) | synonym | No | senior synonym |
new combination |