| Escavadodontidae(noun, creature, appearance, paleocene) |
| Eurymylidae(noun, creature, appearance, paleocene) |
| Eutypomyidae(noun, creature, appearance, eocene) |
| Euzaphlegidae(noun, creature, appearance, paleocene) |
| Extant Oligocene first appearance(expression, appearance, period, oligocene) |
| Extant Paleocene first appearance(expression, appearance, period, paleocene) |
| Fabiania(noun, creature, appearance, paleocene) |
| Ficopsis(noun, creature, appearance, paleocene) |
| Florentiamyidae(noun, creature, appearance, eocene) |
| Florissantia(noun, creature, appearance, eocene) |
| Formiciinae(noun, creature, appearance, eocene) |
| Galecyon(noun, creature, appearance, eocene) |
| Gastornis(noun, creature, appearance, paleocene) |
| Gigantostrea(noun, creature, appearance, eocene) |
| Gobiomyidae(noun, creature, appearance, eocene) |
| Ground sloth(expression, creature, appearance, eocene) |
| Hanleya(noun, creature, appearance, oligocene) |
| Hapalodectidae(noun, creature, appearance, paleocene) |
| Hegetotheriidae(noun, creature, appearance, eocene) |
| Heliscomyidae(noun, creature, appearance, eocene) |