| Rotularia(noun, fauna, eocene, extinction) |
| Sarkastodon(noun, fauna, eocene, extinction) |
| Schochia(noun, extinction, paleocene, genus) |
| Sinonyx(noun, extinction, paleocene, genus) |
| Sinopa(noun, fauna, extinction, rupelian) |
| Spathorhynchus(noun, fauna, extinction, rupelian) |
| Sphenopsalis(noun, extinction, paleocene, genus) |
| Stauranderaster(noun, extinction, paleocene, genus) |
| Stygimys(noun, extinction, paleocene, genus) |
| Stylina(noun, fauna, eocene, extinction) |
| Subhyracodon(noun, fauna, extinction, chattian) |
| Sunkahetanka(noun, fauna, extinction, chattian) |
| Taeniodonta(noun, fauna, extinction, priabonian) |
| Taeniolabis(noun, extinction, paleocene, genus) |
| Temnocidaris(noun, extinction, paleocene, genus) |
| Tessarolax(noun, extinction, paleocene, genus) |
| Tethysuchia(noun, fauna, extinction, ypresian) |
| Thamnasteria(noun, fauna, eocene, extinction) |
| Theelia(noun, fauna, extinction, lutetian) |
| Tomistoma cairense(expression, fauna, extinction, lutetian) |