| Heterakidae Railliet & Henry, 1912 |
| Heterakinae Railliet & Henry, 1912 |
| Heterakis Dujardin, 1845 |
| Heterakis cordata von Linstow, 1906 |
| Heterakis lineata Schneider, 1866 |
| Heterakis spumosa Schneider, 1866 |
| Spinicauda Travassos, 1920 |
| Spinicauda spinicauda (Olfers, 1819) Travassos, 1920 |
| Spinicaudinae Travassos, 1920 |
| Strongyluris Mueller, 1894 |
| Strongyluris acaudata Caballero, 1941 |
| Strongyluris panamensis Goldberg, Bursey & Telford, 2003 |
| Strongyluris similis Caballero, 1938 |