| Pleuraspidotherium(noun, extinction, paleocene, genus) |
| Pliolophus(noun, fauna, eocene, extinction) |
| Poabromylus(noun, fauna, extinction, priabonian) |
| Poebrotherium(noun, fauna, extinction, rupelian) |
| Presbyornithidae(noun, fauna, extinction, rupelian) |
| Prionessus(noun, extinction, paleocene, genus) |
| Priscocamelus(noun, fauna, extinction, chattian) |
| Proaracana(noun, fauna, eocene, extinction) |
| Proborhyaenida(noun, fauna, extinction, chattian) |
| Prochetodon(noun, fauna, eocene, extinction) |
| Prodinoceras(noun, extinction, paleocene, genus) |
| Propalaeotherium(noun, fauna, eocene, extinction) |
| Proplatyarthrus(noun, extinction, genus, oligocene) |
| Protitanotherium(noun, fauna, extinction, priabonian) |
| Pseudocrypturus(noun, fauna, eocene, extinction) |
| Psittacotherium(noun, extinction, paleocene, genus) |
| Purgatorius(noun, extinction, paleocene, genus) |
| Pycnodontidae(noun, fauna, extinction, lutetian) |
| Pycnodus(noun, fauna, extinction, lutetian) |
| Rhynchonella(noun, fauna, eocene, extinction) |