| Nominal Species (n = 4) | Present allocation (n = 4) | Ref. |
|---|---|---|
| Stylochus californicus Hyman, 1953 | Stylochus californicus | 19 |
| Stylochus exiguus Hyman, 1953 | Stylochus exiguus | 19 |
| Stylochus franciscanus Hyman, 1953 | Stylochus franciscanus | 19 |
| Idioplana pacifica Kato, 1943 | Leptostylochus pacificus | 3477 |