| Kentriodontidae(noun, creature, geohistory, appearance, oligocene) |
| Mammacyon(noun, creature, geohistory, appearance, oligocene) |
| Merycochoerus(noun, creature, geohistory, appearance, oligocene) |
| Miotylopus(noun, creature, geohistory, appearance, oligocene) |
| Octodontotherium(noun, creature, geohistory, appearance, oligocene) |
| Orophodontidae(noun, creature, geohistory, appearance, oligocene) |
| Pampatheriidae(noun, creature, geohistory, appearance, oligocene) |
| Paroreodon(noun, creature, geohistory, appearance, oligocene) |
| Peltephilus(noun, creature, geohistory, appearance, oligocene) |
| Psephophorus(noun, creature, geohistory, appearance, oligocene) |
| Rhyssoplax(noun, creature, geohistory, appearance, oligocene) |
| Stenomylus(noun, creature, geohistory, appearance, oligocene) |
| Temnocyon(noun, creature, geohistory, appearance, oligocene) |
| Temnocyoninae(noun, creature, geohistory, appearance, oligocene) |
| Teratornithidae(noun, creature, geohistory, appearance, oligocene) |
| Wynyardiidae(noun, creature, geohistory, appearance, oligocene) |
| Yarala(noun, creature, geohistory, appearance, oligocene) |
| enhydrocyon(noun, genus, sister, genera) |
| eucyon(noun, genus, sister, genera) |
| hesperocyon(noun, genus, sister, genera) |