| Molinostrongylus Skarbilovitch, 1934 |
| Molinostrongylus delicatus (Schwartz, 1927) Travassos, 1937 |
| Nematodirinae Skrjabin & Orloff, 1934 |
| Nematodirus Ransom, 1907 |
| Nematodirus didelphis Travassos, 1914 |
| Oswaldocruzia Travassos, 1917 |
| Oswaldocruzia lamotheargumedoi Ruiz-Torres, García-Prieto, Osorio-Sarabia & Violante-González, 2013 |
| Oswaldocruzia lescurei Ben-Slimane & Durette-Desset, 1996 |
| Oswaldocruzia pipiens Walton, 1929 |
| Oswaldocruzia subauricularis (Rudolphi, 1819) Travassos, 1917 |
| Tadaridanema Falcón-Ordaz, Guzmán-Cornejo, García-Prieto & Gardner, 2006 |
| Tadaridanema delicatus (Schwartz, 1927) Falcón-Ordaz, Guzmán-Cornejo, García-Prieto & Gardner, 2006 |
| Torrestrongylus Pérez-Vigueras, 1935 |
| Torrestrongylus tetradorsalis Caspeta-Mandujano, Peralta-Rodríguez, Galindo-García & Jiménez-Ruiz, 2015 |
| Tricholeiperia Travassos, 1935 |
| Tricholeiperia carnegiensis Chitwood, B. G., 1938 |
| Tricholeiperia leiperi Travassos, 1935 |
| Tricholeiperia pearsei Chitwood, B. G., 1938 |
| Websternema Vaucher & Durette-Desset, 1986 |
| Websternema parnelli (Webster, 1971) Vaucher & Durette-Desset, 1986 |