| Chanomphalus Strebel, 1880 |
| Chanomphalus cidarisca (Von Martens, 1892) |
| Chanomphalus elegantulus (Pfeiffer, 1867) |
| Chanomphalus minusculus (Binney, 1840) |
| Chanomphalus pilsbryi (H. B. Baker, 1922) |
| Charopidae Hutton, 1884 |
| Radiodiscus Pilsbry & Ferriss, 1906 |
| Radiodiscus (Radiodiscus) Pilsbry & Ferriss, 1906 |
| Radiodiscus (Radiodiscus) millicostatus Pilsbry & Ferriss, 1906 |
| Radiodiscus (Radiodiscus) millicostatus subsp. costaricanus Pilsbry, 1926 |
| Radiodiscus (Radiodiscus) millicostatus subsp. millicostatus Pilsbry & Ferriss, 1906 |
| Radiodiscus (Radiodiscus) proameri H. B. Baker, 1930 |
| Radiodiscus millicostatus Pilsbry & Ferriss, 1906 |
| Radiodiscus millicostatus subsp. millicostatus Pilsbry & Ferriss, 1906 |
| Radiodiscus proameri H. B. Baker, 1930 |
| Rotadiscinae H. B. Baker, 1927 |
| Rotadiscus Pilsbry, 1926 |
| Rotadiscus hermanni (Pfeiffer, 1866) |
| Rotadiscus hermanni subsp. hermanni (Pfeiffer, 1866) |
| Rotadiscus hermanni subsp. nivatus H. B. Baker, 1930 |