| Isotemnidae(noun, creature, geohistory, paleocene) |
| John Dory(expression, creature, geogistory, oligocene) |
| Lazarussuchus(noun, creature, geohistory, paleocene) |
| Leontiniidae(noun, creature, geohistory, eocene) |
| Lepidopleurus(noun, creature, geohistory, paleocene) |
| Leptaucheniinae(noun, creature, geohistory, chattian) |
| Leptocyon(noun, creature, geohistory, rupelian) |
| Leptomerycinae(noun, creature, geohistory, eocene) |
| Leptomeryx(noun, creature, geohistory, eocene) |
| Limnocyon(noun, creature, geohistory, eocene) |
| Litopterna(noun, creature, geohistory, paleocene) |
| Lobocarcinus(noun, creature, geohistory, eocene) |
| Macginitiea(noun, creature, geohistory, eocene) |
| Machaeroides(noun, creature, geohistory, eocene) |
| Macraucheniidae(noun, creature, geohistory, eocene) |
| Mammalodontidae(noun, creature, geohistory, chattian) |
| Maximucinus muirheadae(expression, creature, geohistory, rupelian) |
| Megabat(noun, creature, eocene, geogistory) |
| Megalonychidae(noun, creature, geohistory, rupelian) |
| Megatheriidae(noun, creature, geohistory, rupelian) |