| Heterotyphlum Spaul, 1927 |
| Heterotyphlum eurycheilum Olson, 1952 |
| Hysterothylacium Ward & Magath, 1917 |
| Hysterothylacium cenotae (Pearse, 1936) Moravec, Vivas-Rodríguez, Scholz, Vargas-Vázquez, Mendoza-Franco & González-Solís, 1995 |
| Hysterothylacium eurycheilum (Olsen, 1952) Deardorff & Overstreet, 1981 |
| Hysterothylacium fortalezae (Klein, 1973) Deardorff & Overstreet, 1980 |
| Hysterothylacium pelagicum Deardorff & Overstreet, 1982 |
| Hysterothylacium perezi Gopar-Merino, Osorio-Sarabia & García-Prieto, 2005 |
| Hysterothylacium reliquens (Norris & Overstreet, 1975) Deardorff & Overstreet, 1980 |
| Raphidascarididae Hartwich, 1954 |
| Raphidascaridinae Hartwich, 1954 |
| Raphidascaridini Hartwich, 1954 |
| Raphidascaridinii Hartwich, 1954 |
| Thynnascaris Dollfus, 1933 |
| Thynnascaris reliquens Norris & Overstreet, 1975 |