| Asterostomatidae(noun, animal, geohistory, appearance) |
| Astrapotheriidae(noun, animal, geohistory, appearance) |
| Azibiidae(noun, animal, geohistory, appearance) |
| Bartonian first appearance(expression, appearance, period, geochronology) |
| Barytherium(noun, animal, geohistory, appearance) |
| Basilosaurinae(noun, animal, geohistory, appearance) |
| Bear dog(expression, animal, geohistory, appearance) |
| Borhyaenidae(noun, animal, geohistory, appearance) |
| Bothriogenys(noun, animal, geohistory, appearance) |
| Brontotheriidae(noun, animal, geohistory, appearance) |
| Cercamoniinae(noun, animal, geohistory, appearance) |
| Chalicothere(noun, animal, geohistory, appearance) |
| Chalicotherioidea(noun, animal, geohistory, appearance) |
| Coeloma(noun, animal, geohistory, appearance) |
| Conoclypus(noun, animal, geohistory, appearance) |
| Cosmopolitodus hastalis(expression, animal, geohistory, appearance) |
| Cynodictis(noun, animal, geohistory, appearance) |
| Daphoenus(noun, animal, geohistory, appearance) |
| Dermotherium(noun, animal, geohistory, appearance) |
| Diamantomyidae(noun, animal, geohistory, appearance) |