| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Sycandra maximum | Haeckel, 1872 | synonym | No | senior synonym |
original combination |
| Sycandra polare | Haeckel, 1872 | synonym | No | senior synonym |
original combination |
| Sycon arcticum | (Haeckel, 1870) | accepted name | Yes | senior synonym |
new combination |
| Sycum arcticum | Haeckel, 1870 | synonym | No | senior synonym |
original combination |