| Cynodictis(noun, creature, geohistory, appearance, eocene) |
| Daphoenus(noun, creature, geohistory, appearance, eocene) |
| Dermotherium(noun, creature, geohistory, appearance, eocene) |
| Diamantomyidae(noun, creature, geohistory, appearance, eocene) |
| Dichobunidae(noun, creature, geohistory, appearance, eocene) |
| Diplocynodontinae(noun, creature, geohistory, appearance, eocene) |
| Dissacus(noun, fauna, eocene, extinction) |
| Echinopedinidae(noun, creature, geohistory, appearance, eocene) |
| Ecphora(noun, creature, geohistory, appearance, eocene) |
| Enchodus(noun, fauna, eocene, extinction) |
| Entelodont(noun, creature, geohistory, appearance, eocene) |
| Eomyidae(noun, creature, geohistory, appearance, eocene) |
| Eosimiidae(noun, creature, geohistory, appearance, eocene) |
| Epihippus(noun, fauna, eocene, extinction) |
| Epoicotheriidae(noun, creature, geohistory, appearance, eocene) |
| Eutypomyidae(noun, creature, geohistory, appearance, eocene) |
| Fabiania(noun, fauna, eocene, extinction) |
| Florentiamyidae(noun, creature, geohistory, appearance, eocene) |
| Florissantia(noun, creature, geohistory, appearance, eocene) |
| Formiciinae(noun, creature, geohistory, appearance, eocene) |