| Cora pavonia (Weber & D. Mohr) Mont., 1835 |
| Cordana Preuss, 1851 |
| Cordana abramovii E. O. Semen & Davydkina, 1983 |
| Cordana crassa Tóth, 1975 |
| Cordana ellipsoidea de Hoog, 1973 |
| Cordana musae (Zimm.) Höhn., 1923 |
| Cordana uniseptata L. Cai, McKenzie & K.D. Hyde, 2004 |
| Cordierites Mont., 1840 |
| Cordierites concrescens (Schwein.) Sacc., 1833 |
| Coremiella Bubák & Krieg., 1912 |
| Coremiella cubispora (Berk. & M.A. Curtis) M.B. Ellis, 1971 |
| Corneromyces Ginns, 1976 |
| Corneromyces murrillii (Burt) Nakasone, 2015 |
| Corynesporopsis P. M. Kirk, 1981 |
| Corynesporopsis rionensis Hol.-Jech., 1986 |
| Corynesporopsis uniseptata P. M. Kirk, 1981 |
| Cotylidia P. Karst., 1881 |
| Cotylidia aurantiaca (Pers.) A. L. Welden, 1958 |
| Cotylidia cyphelloides (Berk. & M. A. Curtis) A. L. Welden, 1958 |
| Cotylidia diaphana (Schwein.) Lentz, 1955 |