| Casaleia(noun, creature, geohistory, lutetian) |
| Cassidulina(noun, creature, geohistory, eocene) |
| Castoridae(noun, creature, geohistory, eocene) |
| Castorimorpha(noun, creature, geohistory, eocene) |
| Catarrhini(noun, creature, geohistory, eocene) |
| Cathartiformes(noun, creature, geohistory, eocene) |
| Celleporidae(noun, creature, geohistory, eocene) |
| Centropomidae(noun, creature, geohistory, eocene) |
| Centropomus(noun, creature, geohistory, eocene) |
| Cheiragonidae(noun, creature, geohistory, eocene) |
| Cladonychiidae(noun, creature, geohistory, eocene) |
| Clupeidae(noun, creature, geohistory, eocene) |
| Clypeaster(noun, creature, geohistory, eocene) |
| Coconut(noun, creature, geohistory, eocene) |
| Coelopleurus(noun, creature, geohistory, eocene) |
| Colymboides(noun, creature, geohistory, priabonian) |
| Cone snail(expression, creature, geohistory, eocene) |
| Conger(noun, creature, geohistory, eocene) |
| Conus(noun, creature, geohistory, eocene) |
| Coraciiformes(noun, creature, geohistory, eocene) |