| Eucrate De Hann, 1835 |
| Eucrate californiensis Lockington, 1877 |
| Eucrate crassimanus Dana, 1851 |
| Euryplacidae Stimpson, 1871 |
| Euryplax Stimpson, 1859 |
| Euryplax nitida Stimpson, 1859 |
| Euryplax polita Smith, 1870 |
| Frevillea A. Milne-Edwards, 1880 |
| Frevillea barbata A. Milne-Edwards, 1880 |
| Frevillea sigsbei A. Milne-Edwards, 1880 |
| Sotoplax Guinot, 1984 |
| Sotoplax robertsi Guinot, 1984 |
| Trizocarcinus Rathbun, 1914 |
| Trizocarcinus dentatus (Rathbun, 1894) |
| Trizocarcinus magnificus (Bouvier, 1898) |