| Cruzia Travassos, 1917 |
| Cruzia americana Maplestone, 1930 |
| Cruzia mexicana Khalil, 1927 |
| Cruzia morleyi Pearse, 1936 |
| Cruzia tentaculata (Rudolphi, 1819) Travassos, 1917 |
| Cruzia tropidodipsi Ubelaker & Younus, 1965 |
| Cruziinae Travassos, 1917 |
| Dibulbiger Caballero, 1935 |
| Dibulbiger longispiculis Caballero, 1935 |
| Falcaustra Lane, 1915 |
| Falcaustra affinis (Leidy, 1856) Harwood, 1932 |
| Falcaustra caballeroi Chabaud & Golvan, 1957 |
| Falcaustra concinnae (Mackin, 1936) Freitas & Lent, 1941 |
| Falcaustra inglisi (Anderson, 1964) Baker, 1980 |
| Falcaustra intermedia (Caballero, 1939) Freitas & Lent, 1941 |
| Falcaustra lowei Bursey & Goldberg, 2001 |
| Falcaustra ranae (Walton, 1941) Chabaud & Golvan, 1957 |
| Falcaustra wardi (Mackin, 1936) Freitas & Lent, 1941 |
| Kathlaniidae Lane, 1914 |
| Kathlaniinae Lane, 1914 |