| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Sipunculus angasii | Baird, 1868 | synonym | No | junior synonym |
original combination |
| Sipunculus gravieri | Hérubel, 1904 | synonym | No | junior synonym |
original combination |
| Sipunculus robustus | Keferstein, 1865 | accepted name | Yes | senior synonym |
original combination |