| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Golfingia intermedia | (Southern, 1913) | synonym | No | junior synonym |
new combination |
| Phascolion africanum | Fischer, 1923 | synonym | No | junior synonym |
original combination |
| Phascolion alberti | Sluiter, 1900 | synonym | No | junior synonym |
original combination |
| Phascolion anomalus | Murina, 1981 | synonym | No | junior synonym |
original combination |
| ! Phascolion artificiosum | Ikeda, 1904 | synonym | No | junior synonym |
original combination |
| Phascolion artificiosus | Ikeda, 1904 | synonym | No | junior synonym |
original combination |
| Phascolion brotzkajae | Murina, 1964 | synonym | No | junior synonym |
original combination |
| Phascolion cronullae | Edmonds, 1980 | synonym | No | junior synonym |
original combination |
| Phascolion intermedia | (Southern, 1913) | synonym | No | junior synonym |
new combination |
| Phascolion mogadrense | Sluiter, 1912 | synonym | No | junior synonym |
original combination |
| Phascolion spetsbergense | Théel, 1975 | synonym | No | junior synonym |
original combination |
| ! Phascolion strombi | (Montagu, 1804) | ambiguous synonym | No | other |
new combination |
| Phascolion strombi africanum | (Fischer, 1923) | synonym | No | junior synonym |
change in rank |
| Phascolion strombus | (Montagu, 1804) | accepted name | Yes | senior synonym |
new combination |
| Phascolion strombus cronullae | (Edmonds, 1980) | accepted name | No | senior synonym |
new combination |
| Phascolion strombus strombus | (Montagu, 1804) | accepted name | No | senior synonym |
new combination |
| Phascolion tortum | Edmonds, 1976 | synonym | No | junior synonym |
original combination |
| Phascolion tubiculum | (Verrill, 1873) | synonym | No | junior synonym |
new combination |
| Phascolosoma hamulatum | Packard, 1867 | synonym | No | senior synonym |
original combination |
| Phascolosoma intermedium | Southern, 1913 | synonym | No | junior synonym |
original combination |
| Phascolosoma tubicola | Verrill, 1873 | synonym | No | junior synonym |
original combination |
| Sipunculus bernnhardus | Forbes, 1841 | synonym | No | junior synonym |
original combination |
| Sipunculus caementarius | de Quatrefages, 1865 | synonym | No | junior synonym |
original combination |
| Sipunculus capitatus | Rathke, 1843 | synonym | No | junior synonym |
original combination |
| Sipunculus concharum | Oersted, 1844 | synonym | No | junior synonym |
original combination |
| Sipunculus dentalii | Gray, 1828 | synonym | No | junior synonym |
original combination |
| Sipunculus strombus | Montagu, 1804 | synonym | No | senior synonym |
original combination |