| Litopterna(noun, animal, creature, geohistory, appearance) |
| Mesonychid(noun, animal, creature, geohistory, appearance) |
| Mesonychidae(noun, animal, creature, geohistory, appearance) |
| Mixodectidae(noun, animal, creature, geohistory, appearance) |
| Notoungulata(noun, animal, creature, geohistory, appearance) |
| Obdurodon(noun, animal, creature, geohistory, appearance) |
| Omomyidae(noun, animal, creature, geohistory, appearance) |
| Oxyaena(noun, animal, creature, geohistory, appearance) |
| Palaeonictis(noun, animal, creature, geohistory, appearance) |
| Pantodonta(noun, animal, creature, geohistory, appearance) |
| Periptychidae(noun, animal, creature, geohistory, appearance) |
| Plesiadapidae(noun, animal, creature, geohistory, appearance) |
| Plesiadapoidea(noun, animal, creature, geohistory, appearance) |
| Prolimnocyon(noun, animal, creature, geohistory, appearance) |
| Pyrotheria(noun, animal, creature, geohistory, appearance) |
| Sebecidae(noun, animal, creature, geohistory, appearance) |
| Sparassodonta(noun, animal, creature, geohistory, appearance) |
| Sveltia(noun, animal, creature, geohistory, appearance) |
| Toxodonta(noun, animal, creature, geohistory, appearance) |
| Tytthaena(noun, animal, creature, geohistory, appearance) |