| Conticribra Stachura-Suchoples & Williams, 2009 |
| Conticribra weissflogii (Grunow) Stachura-Suchoples & Williams, 2009 |
| Cyclostephanos Round ex Theriot, Håk., Kociolek, Round & Stoermer, 1987 |
| Cyclostephanos dubius (Hustedt) Round, 1987 |
| Cyclostephanos invisitatus (Hohn & Hellermann) Theriot, Stoermer & Håkasson, 1988 |
| Cyclostephanos mansfeldensis Houk, Kleen & H. Tanaka, 2014 |
| Cyclostephanos novae-zeelandiae (Cleve) Round, 1988 |
| Cyclotella (Kütz.) Bréb., 1838 |
| Cyclotella alchichicana Olivia, Lugo, Alocer & Cantoral-Uriza, 2006 |
| Cyclotella antiqua W. Sm., 1853 |
| Cyclotella atomus Hust., 1937 |
| Cyclotella atomus var. gracilis Genkal & Kiss, 1993 |
| Cyclotella bodanica Grunow, 1878 |
| Cyclotella caspia Grunow, 1878 |
| Cyclotella catenata (Brun) Bachmann, 1911 |
| Cyclotella choctawhatcheeana A.K.S. Prasad, 1990 |
| Cyclotella comta (Ehrenb.) Håk., 2002 |
| Cyclotella desikacharyi A.K.S. Prasad, 2006 |
| Cyclotella distinguenda Hust., 1928 |
| Cyclotella kuetzingiana Thwaites, 1848 |