| Octodontotherium(noun, geohistory, unit, argentina) |
| Octomylodon(noun, geohistory, unit, argentina) |
| Opisthodactylus(noun, geohistory, unit, argentina) |
| Pachyrukhos(noun, geohistory, unit, argentina) |
| Palaeomyrmidon(noun, geohistory, unit, argentina) |
| Palaeospheniscus bergi(expression, geohistory, unit, argentina) |
| Palaeospheniscus bilocular(expression, geohistory, unit, argentina) |
| Palaeospheniscus gracilis(expression, geohistory, unit, argentina) |
| Palaeospheniscus patagonicus(expression, geohistory, unit, argentina) |
| Palaeospheniscus wimani(expression, geohistory, unit, argentina) |
| Paranauchenia(noun, geohistory, unit, argentina) |
| Paraptenodytes(noun, geohistory, unit, argentina) |
| Paraptenodytes brodkorbi(expression, geohistory, unit, argentina) |
| Paraptenodytes robustus(expression, geohistory, unit, argentina) |
| Parastrapotherium(noun, geohistory, unit, argentina) |
| Patagonia(noun, geohistory, unit, argentina) |
| Patagornis(noun, geohistory, unit, argentina) |
| Patagosmilus(noun, geohistory, unit, argentina) |
| Pelecyodon(noun, geohistory, unit, argentina) |
| Peltephilus(noun, geohistory, unit, argentina) |