| Leptictida(noun, geohistory, fauna, extinction, oligocene) |
| Miohippus(noun, geohistory, fauna, extinction, oligocene) |
| Multituberculata(noun, geohistory, fauna, extinction, oligocene) |
| Palaeolagus(noun, geohistory, fauna, extinction, oligocene) |
| Palaeotheriidae(noun, geohistory, fauna, extinction, oligocene) |
| Palimphyes(noun, geohistory, fauna, extinction, oligocene) |
| Pantolestidae(noun, geohistory, fauna, extinction, oligocene) |
| Parapithecidae(noun, geohistory, fauna, extinction, oligocene) |
| Parapithecoidea(noun, geohistory, fauna, extinction, oligocene) |
| Peltosaurus(noun, geohistory, fauna, extinction, oligocene) |
| Proteopithecidae(noun, geohistory, fauna, extinction, oligocene) |
| danian first appearance(noun, animal, geohistory, appearance) |
| extant paleocene first appearance(noun, creature, geohistory, paleocene) |
| chattian extinction(noun, fauna, extinction, oligocene) |
| oligocene genus extinction(noun, fauna, extinction, oligocene) |
| rupelian extinction(noun, fauna, extinction, oligocene) |
| cretaceous-paleogene boundary(noun, geohistory, extinction, oligocene) |
| eocene extinction(noun, geohistory, extinction, oligocene) |
| eocene first appearance(noun, creature, geohistory, paleocene) |
| extant paleogene first appearance(noun, creature, geohistory, paleocene) |