| Hoplophoneus(noun, fauna, extinction, rupelian) |
| Hukoutherium(noun, eocene, extinction, genus) |
| Hypsamasia(noun, eocene, extinction, genus) |
| Idrissia(noun, eocene, extinction, genus) |
| Lammidhania(noun, eocene, extinction, genus) |
| Limnenetes(noun, fauna, extinction, rupelian) |
| Linthia(noun, eocene, extinction, genus) |
| Lithornis(noun, fauna, extinction, bartonian) |
| Lithornithidae(noun, fauna, extinction, bartonian) |
| Lutetian genus extinction(expression, eocene, extinction, genus) |
| Machaeroides(noun, eocene, extinction, genus) |
| Madtsoia(noun, eocene, extinction, genus) |
| Mene oblonga(expression, fauna, extinction, rupelian) |
| Mesohippus(noun, fauna, extinction, rupelian) |
| Mesonychid(noun, fauna, extinction, rupelian) |
| Mesonychidae(noun, fauna, extinction, rupelian) |
| Mesonyx(noun, eocene, extinction, genus) |
| Metarhinus(noun, eocene, extinction, genus) |
| Metopaster(noun, eocene, extinction, genus) |
| Mongolestes(noun, fauna, extinction, rupelian) |