| Cimolomyidae(noun, fauna, extinction, paleocene) |
| Condylarth(noun, fauna, extinction, paleocene) |
| Copecion(noun, fauna, eocene, extinction) |
| Cormocyon(noun, fauna, extinction, oligocene) |
| Coryphodon(noun, fauna, eocene, extinction) |
| Coryphodontidae(noun, fauna, eocene, extinction) |
| Crommium(noun, fauna, eocene, extinction) |
| Cuneus(noun, fauna, extinction, paleocene) |
| Cymatoceras(noun, fauna, extinction, oligocene) |
| Cymatoceratidae(noun, fauna, extinction, oligocene) |
| Deltatheroida(noun, fauna, extinction, paleocene) |
| Denver Formation(expression, geohistory, formation, paleogene) |
| Dinocerata(noun, fauna, eocene, extinction) |
| Dinopanorpidae(noun, fauna, eocene, extinction) |
| Dissacus(noun, fauna, eocene, extinction) |
| Dyrosauridae(noun, fauna, eocene, extinction) |
| Echinocorys(noun, fauna, extinction, paleocene) |
| Echinopedinidae(noun, fauna, eocene, extinction) |
| Enchodus(noun, fauna, eocene, extinction) |
| Eocene genus extinction(expression, extinction, period, geochronology) |