| clitocybe brunneocaperata | species | | | species | 1491747 |
| corticiaceae sp. 2 icmp 18811 | no rank | | | species | 1073191 |
| corticiaceae sp. 5 icmp 18908 | no rank | | | species | 1073194 |
| corticiaceae sp. 6 icmp 18909 | no rank | | | species | 1073195 |
| cortinarius carneipallidus | species | | | species | 1713707 |
| cortinarius carneipallidus | species | | | species | 1592658 |
| cortinarius cramesinus | species | | | species | 1815610 |
| cortinarius cretax | species | eukaryota | plants | species | 304787 |
| cortinarius elaiochrous var. leontis | varietas | | | varietas | 1256231 |
| cortinarius eutactus | species | eukaryota | plants | species | 933329 |