| Bucephalidae Poche, 1907 |
| Bucephalinae Poche, 1907 |
| Bucephaloides Hopkins, 1954 |
| Bucephaloides bennetti Hopkins & Sparks, 1958 |
| Bucephaloides cybii Park, 1939 |
| Bucephaloides scomberomorus Corkum, 1968 |
| Bucephalopsis Diesing, 1855 |
| Bucephalopsis arcuatus (Linton, 1900) Eckmann, 1932 |
| Bucephalopsis strongylurae (Hopkins, 1954) Yamaguti, 1958 |
| Bucephalus Baer, 1827 |
| Bucephalus gorgon (Linton, 1904) Eckmann, 1932 |
| Bucephalus heterotentaculatus Bravo-Hollis & Sogandares-Bernal, 1956 |
| Bucephalus introversus Manter, 1940 |
| Bucephalus margaritae Ozaki & Ishibashi, 1934 |
| Bucephalus varicus Manter, 1940 |
| Dollfustrema Eckmann, 1934 |
| Dollfustrema californiae Montgomery, 1957 |
| Gasterostomum Von Siebold, 1848 |
| Gasterostomum capitatum Linton, 1940 |
| Gasterostomum gorgon Linton, 1904 |