| Lebbeus washingtonianus (Rathbun, 1902) |
| Spirontocaris Spence Bate, 1888 |
| Spirontocaris franciscana Schmitt, 1921 |
| Spirontocaris lagunae Schmitt, 1921 |
| Spirontocaris prionota (Stimpson, 1864) |
| Spirontocaris sica Rathbun, 1902 |
| Spirontocaris snyderi Rathbun, 1902 |
| Spirontocaris truncata Rathbun, 1902 |
| Spirontocaris washingtoniana Rathbun, 1902 |
| Thor Kingsley, 1878 |
| Thor algicola Wicksten, 1987 |
| Thor amboinensis (De Man, 1888) |
| Thor cordelli Wicksten, 1996 |
| Thor dobkini Chace, 1972 |
| Thor floridanus Kingsley, 1878 |
| Thor manningi Chace, 1972 |
| Thor paschalis (Heller, 1862) |
| Thor spinosus Boone, 1935 |
| Thoridae Kingsley, 1879 |