| Hyporhina(noun, geohistory, fauna, extinction, oligocene) |
| Leptauchenia(noun, geohistory, fauna, extinction, oligocene) |
| Leptictida(noun, geohistory, fauna, extinction, oligocene) |
| Miohippus(noun, geohistory, fauna, extinction, oligocene) |
| Multituberculata(noun, geohistory, fauna, extinction, oligocene) |
| Omomyidae(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) |
| Pyrotheria(noun, geohistory, fauna, extinction, oligocene) |
| Alopex(noun, genus, sister, genera) |
| Canis(noun, genus, sister, genera) |
| enhydrocyon(noun, genus, sister, genera) |
| eucyon(noun, genus, sister, genera) |
| hesperocyon(noun, genus, sister, genera) |