| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Amphilectus dubius | (Bowerbank, 1874) | synonym | No | junior synonym |
new combination |
| Amphilectus edwardii | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Amphilectus fucorum | (Esper, 1794) | accepted name | Yes | senior synonym |
new combination |
| Amphilectus gracilis | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Amphilectus imitatus | (Bowerbank, 1874) | synonym | No | junior synonym |
new combination |
| Dendoryx thompsoni | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperella normani | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperia collina | (Bowerbank, 1882) | synonym | No | junior synonym |
new combination |
| Esperia normani | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperiopsis dubia | (Bowerbank, 1874) | synonym | No | junior synonym |
new combination |
| Esperiopsis edwardii | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperiopsis fucorum | (Esper, 1794) | synonym | No | senior synonym |
new combination |
| Esperiopsis gracilis | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperiopsis involuta | (Bowerbank, 1882) | synonym | No | junior synonym |
new combination |
| Esperiopsis normani | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperiopsis paupera | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Esperiopsis thompsoni | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Halichondria fucorum | (Esper, 1794) | synonym | No | senior synonym |
new combination |
| Halichondria parasitica | (Montagu, 1818) | synonym | No | junior synonym |
new combination |
| Halichondria thompsoni | Bowerbank, 1866 | synonym | No | junior synonym |
original combination |
| Haliclona parasitica | (Montagu, 1818) | synonym | No | junior synonym |
new combination |
| Isodictya alderi | Bowerbank, 1866 | synonym | No | junior synonym |
original combination |
| Isodictya collina | Bowerbank, 1882 | synonym | No | junior synonym |
original combination |
| Isodictya dubia | Bowerbank, 1874 | synonym | No | junior synonym |
original combination |
| Isodictya edwardii | Bowerbank, 1866 | synonym | No | junior synonym |
original combination |
| Isodictya fucorum | (Esper, 1794) | synonym | No | senior synonym |
new combination |
| Isodictya gracilis | Bowerbank, 1866 | synonym | No | junior synonym |
original combination |
| Isodictya hispida | Bowerbank, 1882 | synonym | No | junior synonym |
original combination |
| Isodictya imitata | Bowerbank, 1874 | synonym | No | junior synonym |
original combination |
| Isodictya invalida | Bowerbank, 1874 | synonym | No | junior synonym |
original combination |
| Isodictya involuta | Bowerbank, 1882 | synonym | No | junior synonym |
original combination |
| Isodictya normani | Bowerbank, 1866 | synonym | No | junior synonym |
original combination |
| Isodictya parasitica | (Montagu, 1818) | synonym | No | junior synonym |
new combination |
| Isodictya paupera | Bowerbank, 1866 | synonym | No | junior synonym |
original combination |
| Isodictya pertenuis | Bowerbank, 1882 | synonym | No | junior synonym |
original combination |
| Isodictya scitula | Bowerbank, 1882 | synonym | No | junior synonym |
original combination |
| Myxilla thompsoni | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Reniera paupera | (Bowerbank, 1866) | synonym | No | junior synonym |
new combination |
| Spongia fucorum | Esper, 1794 | synonym | No | senior synonym |
original combination |
| Spongia parasitica | Montagu, 1818 | synonym | No | junior synonym |
original combination |