| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Sycandra tesserarium | Haeckel, 1872 | synonym | No | junior synonym |
original combination |
| Sycon quadrangulata | (Schmidt, 1868) | synonym | No | senior synonym |
new combination |
| Sycon quadrangulatum | (Schmidt, 1868) | accepted name | Yes | senior synonym |
new combination |
| Syconella quadrangulata | Schmidt, 1868 | synonym | No | senior synonym |
original combination |
| Syconella quadrangulatum | Schmidt, 1868 | synonym | No | senior synonym |
original combination |
| Sycortis quadratum | Haeckel, 1872 | synonym | No | junior synonym |
original combination |
| Sycortis tetragonum | Haeckel, 1872 | synonym | No | junior synonym |
original combination |