| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Sipunculus maoricus | Benham, 1904 | synonym | No | junior synonym |
original combination |
| Sipunculus mundanus | Selenka & Bülow, 1883 | accepted name | Yes | senior synonym |
original combination |
| Xenosiphon mundanum | (Selenka & Bülow, 1883) | synonym | No | senior synonym |
new combination |
| Xenosiphon mundanus | (Selenka & Bülow, 1883) | synonym | No | senior synonym |
new combination |