| Leiognathidae(noun, creature, geohistory, eocene) |
| Leptictidium(noun, creature, geohistory, ypresian) |
| Megachilid bee(expression, creature, geohistory, eocene) |
| Megachilidae(noun, creature, geohistory, eocene) |
| Mekosuchinae(noun, creature, geohistory, ypresian) |
| Melittidae(noun, creature, geohistory, eocene) |
| Metanephrocerus(noun, creature, geohistory, ypresian) |
| Molidae(noun, creature, geohistory, eocene) |
| Monkey(noun, creature, geohistory, eocene) |
| Monodactylidae(noun, creature, geohistory, eocene) |
| Morone(noun, creature, geohistory, eocene) |
| Muroidea(noun, creature, geohistory, eocene) |
| Myomorpha(noun, creature, geohistory, eocene) |
| Mysticeti(noun, creature, geohistory, eocene) |
| Myzopodidae(noun, creature, geohistory, eocene) |
| Naso(noun, creature, geohistory, eocene) |
| Natica(noun, creature, geohistory, eocene) |
| New World vulture(expression, creature, geohistory, eocene) |
| Nimravidae(noun, creature, geohistory, bartonian) |
| Nimravinae(noun, creature, geohistory, bartonian) |