| Cosmocercoides Wilkie, 1930 |
| Cosmocercoides dukae (Holl, 1928) Travassos, 1931 |
| Cosmocercoides kiliwai Martínez-Salazar, Falcón-Ordaz, González-Bernal, Parra-Olea & Pérez-Ponce de León, 2013 |
| Cosmocercoides variabilis (Harwood, 1930) Travassos, 1931 |
| Neoxysomatoides Yamaguti, 1961 |
| Neoxysomatoides mexicanum (Caballero, 1933) Yamaguti, 1961 |
| Oxysomatium Railliet & Henry, 1916 |
| Oxysomatium inglisi Anderson, 1964 |
| Oxysomatium mexicanum Caballero, 1933 |
| Oxysomatium variabilis Harwood, 1930 |
| Oxysomatium waltoni Skrjabin & Schikhobalova, 1951 |
| Raillietnema Travassos, 1927 |
| Raillietnema brachyspiculatum Bursey, Goldberg, Salgado-Maldonado & Méndez-De La Cruz, 1998 |
| Raillietnema kritscheri Moravec, Salgado-Maldonado & Pineda-López, 1993 |
| Raillietnema lynchi Bursey & Goldberg, 2006 |