| Sarkastodon(noun, creature, geohistory, appearance, eocene) |
| Simimyidae(noun, creature, geohistory, appearance, eocene) |
| Sinopa(noun, creature, geohistory, appearance, eocene) |
| Sivaladapidae(noun, creature, geohistory, appearance, eocene) |
| Spathorhynchus(noun, creature, geohistory, appearance, eocene) |
| Stenoplesictidae(noun, creature, geohistory, appearance, eocene) |
| chattian extinction(noun, fauna, extinction, oligocene) |
| oligocene genus extinction(noun, fauna, extinction, oligocene) |
| rupelian extinction(noun, fauna, extinction, oligocene) |
| cretaceous-paleogene boundary(noun, geohistory, extinction, oligocene) |
| eocene extinction(noun, geohistory, extinction, oligocene) |
| extant paleogene first appearance(noun, creature, geohistory, eocene) |
| oligocene first appearance(noun, creature, geohistory, eocene) |
| paleocene extinction(noun, fauna, extinction, oligocene) |
| paleocene first appearance(noun, creature, geohistory, eocene) |
| paleogene extinction(noun, geohistory, extinction, oligocene) |
| paleogene first appearance(noun, creature, appearance, eocene) |
| paleogene genus extinction(noun, fauna, extinction, oligocene) |