| Killikaike(noun, geohistory, unit, argentina) |
| Leopardus vorohuensis(expression, geohistory, unit, argentina) |
| Leptoptilos patagonicus(expression, geohistory, unit, argentina) |
| Leptorrhamphus(noun, geohistory, unit, argentina) |
| Lestodon(noun, geohistory, unit, argentina) |
| Liptornis(noun, geohistory, unit, argentina) |
| Llallawavis(noun, geohistory, unit, argentina) |
| Lycopsis(noun, geohistory, unit, argentina) |
| Macrauchenia(noun, geohistory, unit, argentina) |
| Macroeuphractus(noun, geohistory, unit, argentina) |
| Megapiranha(noun, geohistory, unit, argentina) |
| Mesembriornis(noun, geohistory, unit, argentina) |
| Metaxytherium(noun, geohistory, unit, argentina) |
| Necrolestes(noun, geohistory, unit, argentina) |
| Nematherium(noun, geohistory, unit, argentina) |
| Neotamandua(noun, geohistory, unit, argentina) |
| Nesodon(noun, geohistory, unit, argentina) |
| Nonotherium(noun, geohistory, unit, argentina) |
| Notocetus(noun, geohistory, unit, argentina) |
| Notohippus(noun, geohistory, unit, argentina) |