| Diamantomyidae(noun, creature, geohistory, eocene) |
| Dichobunidae(noun, creature, geohistory, eocene) |
| Diplocynodontinae(noun, creature, geohistory, eocene) |
| Dissacus(noun, creature, geohistory, danian) |
| Dolichoderus vectensis(expression, creature, geohistory, eocene) |
| Dromornithidae(noun, creature, geohistory, oligocene) |
| Echinopedinidae(noun, creature, geohistory, eocene) |
| Ecphora(noun, creature, geohistory, eocene) |
| Ekgmowechashala(noun, creature, geohistory, oligocene) |
| Enoplosus armatus(expression, creature, geohistory, paleocene) |
| Entelodont(noun, creature, geohistory, eocene) |
| Eomyidae(noun, creature, geohistory, eocene) |
| Eosimiidae(noun, creature, geohistory, eocene) |
| Epoicotheriidae(noun, creature, geohistory, eocene) |
| Eutypomyidae(noun, creature, geohistory, eocene) |
| Florentiamyidae(noun, creature, geohistory, eocene) |
| Florissantia(noun, creature, geohistory, eocene) |
| Formiciinae(noun, creature, geohistory, eocene) |
| Fungus-growing ants(expression, creature, geohistory, paleocene) |
| Galecyon(noun, creature, geohistory, eocene) |