| Echinocephalus Molin, 1858 |
| Echinocephalus jenzeni Hoberg, Brooks, Molina-Ureña & Erbe, 1998 |
| Echinocephalus pseudouncinatus Milleman, 1951 |
| Gnathostoma Owen, 1836 |
| Gnathostoma lamothei Bertoni-Ruiz, García-Prieto, Osorio-Sarabia & León-Règagnon, 2005 |
| Gnathostoma procyonis Almeyda-Artigas, Acosta-Hernández, Alonso-Díaz, Castañeda-Sánchez & Zárate-Ramírez, 1994 nec Chandler, 1942 |
| Gnathostoma procyonis León-Règagnon, Osorio-Sarabia, García-Prieto, Lamothe-Argumedo, Bertoni-Ruiz & Oceguera-Figueroa, 2005 nec Chandler, 1942 |
| Gnathostoma spinigerum Caballero, 1958 nec Owen, 1836 |
| Gnathostoma turgidum Stossich, 1902 |
| Gnathostomatidae Railliet, 1895 |
| Gnathostomatinae Railliet, 1895 |
| Spiroxyinae Baylis & Lane, 1920 |
| Spiroxys Schneider, 1866 |
| Spiroxys amydae Cobb, 1929 |
| Spiroxys contortus (Rudolphi, 1819) Schneider, 1866 |
| Spiroxys corti Caballero, 1935 |
| Spiroxys susanae Caballero, 1941 |
| Spiroxys triretrodens Caballero & Cerecero, 1943 |