| Sayella crosseana (Dall, 1885) |
| Sayella fusca (C. B. Adams, 1839) |
| Sayellini Wise, 1996 |
| Triptychus Mörch, 1875 |
| Triptychus incantatus (Hertlein & Strong, 1939) |
| Triptychus niveus (Mörch, 1875) |
| Turbonilla Risso, 1826 |
| Turbonilla (Bartschella) Iredale, 1916 |
| Turbonilla (Bartschella) excolpa Dall & Bartsch, 1909 |
| Turbonilla (Bartschella) subangulata Carpenter, 1857 |
| Turbonilla (Chemnitzia) d'Orbigny, 1839 |
| Turbonilla (Chemnitzia) aculeus (C. B. Adams, 1852) |
| Turbonilla (Chemnitzia) aepynota Dall & Bartsch, 1909 |
| Turbonilla (Chemnitzia) amortajadensis Baker, Hanna & Strong, 1928 |
| Turbonilla (Chemnitzia) kelseyi Dall & Bartsch, 1909 |
| Turbonilla (Chemnitzia) muricata (Carpenter, 1857) |
| Turbonilla (Chemnitzia) paramoea Dall & Bartsch, 1909 |
| Turbonilla (Chemnitzia) sinaloana Strong, 1949 |
| Turbonilla (Pyrgiscus) Philippi, 1841 |
| Turbonilla (Pyrgiscus) almejasensis Bartsch, 1917 |