| Apidium(noun, fauna, extinction, rupelian) |
| Archaeohyracidae(noun, fauna, extinction, chattian) |
| Archaeonycteridae(noun, fauna, extinction, lutetian) |
| Archaeotherium(noun, fauna, extinction, rupelian) |
| Archaeus(noun, fauna, extinction, rupelian) |
| Arctocyon(noun, extinction, paleocene, genus) |
| Arsinoitheriidae(noun, fauna, extinction, rupelian) |
| Arsinoitherium(noun, fauna, extinction, rupelian) |
| Avitoluvarus(noun, fauna, eocene, extinction) |
| Baiotomeus(noun, extinction, paleocene, genus) |
| Barytherium(noun, fauna, extinction, rupelian) |
| Bathygenys(noun, fauna, extinction, rupelian) |
| Bathysoma(noun, extinction, paleocene, genus) |
| Behemotops(noun, fauna, extinction, chattian) |
| Bisonalveus(noun, extinction, paleocene, genus) |
| Boffius(noun, extinction, paleocene, genus) |
| Bothriogenys(noun, fauna, extinction, rupelian) |
| Calciavis(noun, fauna, eocene, extinction) |
| Cernaysia(noun, extinction, paleocene, genus) |
| Chulpasia(noun, fauna, eocene, extinction) |