| Bathygenys(noun, creature, geohistory, priabonian) |
| Bear(noun, creature, geohistory, eocene) |
| Bipedidae(noun, creature, geohistory, eocene) |
| Bitectiporidae(noun, creature, geohistory, eocene) |
| Bolma(noun, creature, geohistory, eocene) |
| Brachionichthys(noun, creature, geohistory, eocene) |
| Branchipodidae(noun, creature, geohistory, eocene) |
| Bucerotiformes(noun, creature, geohistory, eocene) |
| Bumblebee(noun, creature, geohistory, eocene) |
| Cane rat(expression, creature, geohistory, eocene) |
| Caproidae(noun, creature, geohistory, eocene) |
| Caranx(noun, creature, geohistory, eocene) |
| Carcharocles(noun, creature, geohistory, priabonian) |
| 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) |