| Rhynchonella(noun, eocene, extinction, genus) |
| Rotularia(noun, eocene, extinction, genus) |
| Sarkastodon(noun, eocene, extinction, genus) |
| Schochia(noun, extinction, paleocene, genus) |
| Sinonyx(noun, extinction, paleocene, genus) |
| Sphenopsalis(noun, extinction, paleocene, genus) |
| Stauranderaster(noun, extinction, paleocene, genus) |
| Stygimys(noun, extinction, paleocene, genus) |
| Stylina(noun, eocene, extinction, genus) |
| Taeniodonta(noun, fauna, extinction, priabonian) |
| Taeniolabis(noun, extinction, paleocene, genus) |
| Temnocidaris(noun, extinction, paleocene, genus) |
| Tessarolax(noun, extinction, paleocene, genus) |
| Thamnasteria(noun, eocene, extinction, genus) |
| Trachicaranx(noun, extinction, paleocene, genus) |
| Trigonia(noun, extinction, paleocene, genus) |
| Turkmene(noun, extinction, paleocene, genus) |
| Tylocidaris(noun, eocene, extinction, genus) |
| Tytthaena(noun, eocene, extinction, genus) |
| Umayodus(noun, eocene, extinction, genus) |