| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Sipunculus discrepans | Sluiter, 1898 | synonym | No | junior synonym |
original combination |
| Sipunculus indicus | Peters, 1850 | accepted name | Yes | senior synonym |
original combination |
| Sipunculus porrectus | Selenka, 1888 | synonym | No | junior synonym |
original combination |
| Xenosiphon indicus | Johnson, 1969 | synonym | No | senior synonym |
original combination |