| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Gonothyraea integra | Fraser, 1940 | ambiguous synonym | No | other |
original combination |
| Obelia articulat | (Aghassiz, 1865) | synonym | No | junior synonym |
new combination |
| Obelia australis | von, Lendenfeld, 1885 | synonym | No | junior synonym |
original combination |
| Obelia cheloniae | Jarvis, 1922 | synonym | No | junior synonym |
original combination |
| Obelia dichotoma | (Linnaeus, 1758) | accepted name | Yes | senior synonym |
new combination |
| Obelia equilateralis | Fraser, 1938 | synonym | No | junior synonym |
original combination |
| Obelia fragilis | Calkins, 1899 | synonym | No | junior synonym |
original combination |
| Obelia gracilis | Calkins, 1899 | synonym | No | junior synonym |
original combination |
| Obelia griffini | Calkins, 1899 | synonym | No | junior synonym |
original combination |
| Obelia hyalina | Clarke, 1879 | synonym | No | junior synonym |
original combination |
| Obelia nodosa | Bale, 1924 | synonym | No | junior synonym |
original combination |
| Obelia obtusidens | (Jäderholm, 1904) | synonym | No | junior synonym |
new combination |
| Obelia surcularis | Calkins, 1899 | ambiguous synonym | No | other |
original combination |
| Obelia ubia | Nutting, 1901 | synonym | No | junior synonym |
original combination |