| Bear dog(expression, creature, appearance, eocene) |
| Bemalambdidae(noun, creature, appearance, paleocene) |
| Borhyaenidae(noun, creature, appearance, eocene) |
| Borophaginae(noun, creature, appearance, oligocene) |
| Bothriogenys(noun, creature, appearance, eocene) |
| Brontotheriidae(noun, creature, appearance, eocene) |
| Cercamoniinae(noun, creature, appearance, eocene) |
| Chalicothere(noun, creature, appearance, eocene) |
| Chalicotherioidea(noun, creature, appearance, eocene) |
| Clavilithes(noun, creature, appearance, paleocene) |
| Conoclypus(noun, creature, appearance, eocene) |
| Carpolestidae(noun, creature, appearance, paleocene) |
| Chattian first appearance(expression, appearance, period, oligocene) |
| Chubutherium(noun, creature, appearance, oligocene) |
| Coeloma(noun, creature, appearance, eocene) |
| Coryphodon(noun, creature, appearance, paleocene) |
| Coryphodontidae(noun, creature, appearance, paleocene) |
| Cosmopolitodus hastalis(expression, creature, appearance, eocene) |
| Creodonta(noun, creature, appearance, paleocene) |
| Crommium(noun, creature, appearance, paleocene) |