| Copelandia cyanescens (Sacc.) Singer, 1951 |
| Copelandia mexicana Guzmán, 1978 |
| Cora Fr., 1825 |
| Cora casasolana Moncada, R.-E. Pérez & Lücking, 2016 |
| Cora comaltepeca Moncada, R.-E. Pérez & Herrera-Camp., 2016 |
| Cora dulcis Moncada, R.-E. Pérez & Lücking, 2016 |
| Cora glabrata (Spreng.) Fr., 1838 |
| Cora guzmaniana Moncada, Pérez-Pérez & Lücking, 2019 |
| 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 |