| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Phascolosoma fasciatum | Baird, 1868 | synonym | No | junior synonym |
original combination |
| Phascolosoma granulatum | Leuckart, 1828 | accepted name | Yes | senior synonym |
original combination |
| Phascolosoma jeffreysii | Baird, 1868 | synonym | No | junior synonym |
original combination |
| Phascolosoma laeve | Cuvier, 1830 | synonym | No | junior synonym |
original combination |
| Phascolosoma loveni | Koren & Danielssen, 1877 | synonym | No | junior synonym |
original combination |
| Physcosoma granulatum | (Leuckart, 1828) | synonym | No | senior synonym |
new combination |
| Physcosoma herouardi | Hérubel, 1903 | synonym | No | junior synonym |
original combination |
| Physcosoma lanzarotae | Harms, 1921 | synonym | No | junior synonym |
original combination |
| Sipunculus flavus | Risso, 1826 | synonym | No | junior synonym |
original combination |
| Sipunculus genuensis | de Blainville, 1827 | synonym | No | junior synonym |
original combination |
| Sipunculus levis | Cuvier, 1830 | synonym | No | junior synonym |
original combination |
| Sipunculus multiorquatus | de Quatrefages, 1865 | synonym | No | junior synonym |
original combination |
| Sipunculus papillosum | Thompson, 1840 | synonym | No | junior synonym |
original combination |
| Sipunculus tigrinus | Risso, 1826 | synonym | No | junior synonym |
original combination |
| Sipunculus verrucosus | Cuvier, 1830 | synonym | No | junior synonym |
original combination |