| Amphilimna Verrill, 1899 |
| Amphilimna olivacea (Lyman, 1869) |
| Amphilimnidae O'Hara, Stöhr, Hugall, Thuy & Martynov, 2018 |
| Microphiopholis Turner, 1985 |
| Microphiopholis geminata (Le Conte, 1851) |
| Microphiopholis gracillima (Stimpson, 1854) |
| Microphiopholis platydisca (Nielsen, 1932) |
| Microphiopholis puntarenae (Lütken, 1856) |
| Ophiocnida Lyman, 1865 |
| Ophiocnida amphacantha McClendon, 1909 |
| Ophiocnida californica Ziesenhenne, 1940 |
| Ophiocnida filogranea Lyman, 1875 |
| Ophiocnida hispida (Le Conte, 1851) |
| Ophiocnida olivacea Lyman, 1869 |
| Ophiocnida scabriuscula (Lütken, 1859) |
| Ophiocnida sexradia Duncan, 1887 |
| Ophiophragmus Lyman, 1865 |
| Ophiophragmus brachyactis H.L. Clark, 1915 |
| Ophiophragmus filograneus (Lyman, 1875) |
| Ophiophragmus lonchophorus Ziesenhenne, 1940 |