| Afrotarsius(noun, geohistory, fauna, extinction, oligocene) |
| Archaeohyrax(noun, geohistory, fauna, extinction, oligocene) |
| Archaeonycteridae(noun, creature, geohistory, ypresian) |
| Bennettitales(noun, geohistory, fauna, extinction, oligocene) |
| Caedocyon(noun, geohistory, fauna, extinction, oligocene) |
| Calamophylliopsis(noun, geohistory, fauna, extinction, oligocene) |
| Cormocyon(noun, geohistory, fauna, extinction, oligocene) |
| Cymatoceras(noun, geohistory, fauna, extinction, oligocene) |
| Cymatoceratidae(noun, geohistory, fauna, extinction, oligocene) |
| Eosimiidae(noun, geohistory, fauna, extinction, oligocene) |
| Florissantia(noun, geohistory, fauna, extinction, oligocene) |
| Groeberiidae(noun, geohistory, fauna, extinction, oligocene) |
| Hercoglossidae(noun, geohistory, fauna, extinction, oligocene) |
| Holcorpa(noun, creature, geohistory, ypresian) |
| Hyporhina(noun, geohistory, fauna, extinction, oligocene) |
| Hyracotherium(noun, creature, geohistory, ypresian) |
| Leptauchenia(noun, geohistory, fauna, extinction, oligocene) |
| Leptictida(noun, geohistory, fauna, extinction, oligocene) |
| Leptictidium(noun, creature, geohistory, ypresian) |
| Mekosuchinae(noun, creature, geohistory, ypresian) |