| Ceratium bucephalum (Cleve) Cleve, 1900 |
| Ceratium buceros O. Zacharias, 1906 |
| Ceratium candelabrum (Ehrenb.) F. Stein, 1883 |
| Ceratium candelabrum f. depressum (C.H.G. Pouchet, 1883) J. Schill., 1937 |
| Ceratium candelabrum var. depressum (C.H.G. Pouchet, 1883) Jørg., 1920 |
| Ceratium carnegiei Graham & Bronik., 1944 |
| Ceratium carolinianum (Ehrenb.) Jørg., 1911 |
| Ceratium carriense Gourret, 1883 |
| Ceratium carriense f. volans (Cleve, 1900) Er. Lindem., 1924 |
| Ceratium carriense subsp. volans (Cleve, 1900) Margalef & Durán, 1953 |
| Ceratium carriense var. volans (Cleve) Jørg., 1911 |
| Ceratium cephalotum (Lemmerm.) Jørg., 1911 |
| Ceratium claviger Kof., 1907 |
| Ceratium coarctatum Pavill., 1905 |
| Ceratium concilians Jørg., 1920 |
| Ceratium contortum (Gourret) Cleve, 1900 |
| Ceratium contortum f. subcontortum (Schröd., 1906) Steem. Niels., 1934 |
| Ceratium contortum var. karstenii (Pavill.) Sournia, 1966 |
| Ceratium contortum var. robustum (G. Karst., 1907) Sournia, 1966 |
| Ceratium contortum var. subcontortum (Schröd., 1906) F.J.R. Taylor, 1976 |