| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Aspidosiphon insularis | Lanchester, 1905 | synonym | No | junior synonym |
original combination |
| Paraspidosiphon insularis | (Lanchester, 1905) | synonym | No | junior synonym |
new combination |
| Phascolosoma dentigerum | (Selenka & de Man, 1883) | synonym | No | junior synonym |
new combination |
| Phascolosoma microdentigerum | (ten Broeke, 1925) | synonym | No | junior synonym |
new combination |
| Phascolosoma perlucens | Baird, 1868 | accepted name | Yes | senior synonym |
original combination |
| Phascolosoma spinosum | Johnson, 1971 | synonym | No | junior synonym |
original combination |
| Phascolosoma thomense | (Augener, 1903) | synonym | No | junior synonym |
new combination |
| Phascolosoma vermiculum | (de Quatrefages, 1865) | synonym | No | junior synonym |
new combination |
| Phymosoma dentigerum | Selenka & de Man, 1883 | synonym | No | junior synonym |
original combination |
| Physcosoma microdentigerum | ten Broeke, 1925 | synonym | No | junior synonym |
original combination |
| Physcosoma thomense | Augener, 1903 | synonym | No | junior synonym |
original combination |
| Sipunculus vermiculus | de Quatrefages, 1865 | synonym | No | junior synonym |
original combination |