| Calamophylliopsis(noun, fauna, extinction, oligocene) |
| Calciavis(noun, eocene, extinction, genus) |
| Cernaysia(noun, extinction, paleocene, genus) |
| Chulpasia(noun, eocene, extinction, genus) |
| Cimexomys(noun, extinction, paleocene, genus) |
| Cimolesta(noun, eocene, extinction, genus) |
| Copecion(noun, eocene, extinction, genus) |
| Cormocyon(noun, fauna, extinction, oligocene) |
| Coryphodon(noun, eocene, extinction, genus) |
| Crommium(noun, eocene, extinction, genus) |
| Cuneus(noun, extinction, paleocene, genus) |
| Cymatoceras(noun, fauna, extinction, oligocene) |
| Cymatoceratidae(noun, fauna, extinction, oligocene) |
| Diplomystus(noun, fauna, extinction, priabonian) |
| Dissacus(noun, eocene, extinction, genus) |
| Echinocorys(noun, extinction, paleocene, genus) |
| Enchodus(noun, eocene, extinction, genus) |
| Eocene-Oligocene extinction event(expression, geohistory, event, extinction) |
| Eoconodon(noun, extinction, paleocene, genus) |
| Eosimiidae(noun, fauna, extinction, oligocene) |