| Ceratium fusus subsp. seta (Ehrenb. 1859) Jørg. 1911 |
| Ceratium fusus var. schuettii Lemmerm., 1899 |
| Ceratium fusus var. seta (Ehrenb., 1859) Sournia, 1966 |
| Ceratium geniculatum (Lemmerm.) Cleve, 1900 |
| Ceratium gibberum Gourret, 1883 |
| Ceratium gibberum f. dispar (C.H.G. Pouchet, 1883) Jørg., 1920 |
| Ceratium gibberum f. subaequale Jørg., 1920 |
| Ceratium gibberum var. contortum Gourret, 1883 |
| Ceratium gibberum var. dispar (C.H.G. Pouchet, 1883) Sournia, 1966 |
| Ceratium gracile (Gourret) Jørg., 1911 |
| Ceratium gracile var. symmetricum (Pavill.) Jørg., 1911 |
| Ceratium gravidum Gourret, 1883 |
| Ceratium hexacanthum Gourret, 1883 |
| Ceratium hexacanthum f. contortum (Lemmerm., 1899) Böhm, 1931 |
| Ceratium hexacanthum f. spirale (Kof.,1907) Böhm, 1931 |
| Ceratium hexacanthum var. contortum Lemmerm., 1899 |
| Ceratium hircus Schröd., 1909 |
| Ceratium hirundinella (O.F. Müll.) Dujard., 1841 |
| Ceratium hirundinella f. brachyceros (Daday) Ostenf., 1909 |
| Ceratium hirundinella f. furcoides Schröd., 1918 |