| Rhinoceros(noun, creature, geohistory, eocene) |
| Rhodolith(noun, creature, geohistory, eocene) |
| Roller(noun, creature, geohistory, eocene) |
| Rosalina(noun, creature, geohistory, eocene) |
| Rotifer(noun, creature, geohistory, eocene) |
| Rubiaceae(noun, creature, geohistory, eocene) |
| Saccogaster(noun, creature, geohistory, eocene) |
| Sacoglossa(noun, creature, geohistory, eocene) |
| Sardinella(noun, creature, geohistory, eocene) |
| Sawfish(noun, creature, geohistory, eocene) |
| Scarabaeinae(noun, creature, geohistory, eocene) |
| Scatophagidae(noun, creature, geohistory, eocene) |
| Schizoporellidae(noun, creature, geohistory, eocene) |
| Sciurinae(noun, creature, geohistory, eocene) |
| Sciurini(noun, creature, geohistory, eocene) |
| Sciuromorpha(noun, creature, geohistory, eocene) |
| Scorpaena(noun, creature, geohistory, eocene) |
| Semicassis(noun, creature, geohistory, eocene) |
| Shinisauridae(noun, creature, geohistory, eocene) |
| Shrew(noun, creature, geohistory, eocene) |