| Megacerops(noun, fauna, extinction, priabonian) |
| Mesodma(noun, extinction, paleocene, genus) |
| Mesonyx(noun, eocene, extinction, genus) |
| Metanephrocerus(noun, fauna, extinction, priabonian) |
| Metarhinus(noun, eocene, extinction, genus) |
| Metatelmatherium(noun, fauna, extinction, priabonian) |
| Metopaster(noun, eocene, extinction, genus) |
| Microcosmodon(noun, extinction, paleocene, genus) |
| Mimetodon(noun, extinction, paleocene, genus) |
| Neoliotomus(noun, extinction, paleocene, genus) |
| Neoplagiaulax(noun, extinction, paleocene, genus) |
| Orohippus(noun, eocene, extinction, genus) |
| Oxyaena(noun, eocene, extinction, genus) |
| Oxytoma(noun, extinction, paleocene, genus) |
| Pachyaena(noun, eocene, extinction, genus) |
| Palaeoglaux(noun, eocene, extinction, genus) |
| Palaeonictis(noun, eocene, extinction, genus) |
| Palaeotherium(noun, eocene, extinction, genus) |
| Pantodonta(noun, fauna, extinction, priabonian) |
| Paracathartes(noun, eocene, extinction, genus) |