| Neochasmus magnus Winter, 1957 |
| Neochasmus olmecus Lamothe-Argumedo, Pineda-López & Andrade-Salas, 1989 |
| Oligogonotylus Watson, 1976 |
| Oligogonotylus manteri Watson, 1976 |
| Oligogonotylus mayae Razo-Mendivil, Rosas-Valdéz & Pérez-Ponce de León, 2008 |
| Olmeca Lamothe-Argumedo & Pineda-López, 1990 |
| Olmeca laurae Lamothe-Argumedo & Pineda-López, 1990 |
| Palaeocryptogonimus Szidat, 1954 |
| Palaeocryptogonimus batallae (Lamothe-Argumedo, Salgado-Maldonado & Pineda-López, 1991) Miller & Cribb, 2008 |
| Paracryptogonimus Yamaguti, 1934 |
| Paracryptogonimus americanus Manter, 1940 |
| Paracryptogonimus mexicanus Bravo-Hollis, 1953 |
| Paracryptogonimus yamagutii Lamothe-Argumedo, 1969 |
| Pelaezia Lamothe-Argumedo & Ponciano-Rodríguez, 1986 |
| Pelaezia loossi (Pérez-Vigueras, 1956) Salgado-Maldonado & Aguirre-Macedo, 1991 |
| Pelaezia unami (Peláez & Cruz-Lozano, 1953) Lamothe-Argumedo & Ponciano-Rodríguez, 1986 |
| Polycryptocylix Lamothe-Argumedo, 1970 |
| Polycryptocylix leonilae Lamothe-Argumedo, 1970 |
| Proctocaecum Baugh, 1957 |
| Proctocaecum acuti García-Reynoso, 1991 nec (Caballero & Brenes-Madrigal, 1958) Lamothe-Argumedo & Ponciano-Rodríguez, 1986 |