| Nominal Species (n = 4) | Present allocation (n = 4) | Ref. |
|---|---|---|
| Macrochiron fucicolum Brady, 1872 | Macrochiron fucicolum | 19 |
| Macrochiron lytocarpi Humes, 1966 | Macrochiron lytocarpi | 3477 |
| Macrochiron rostratum Humes, 1966 | Macrochiron rostratum | 3477 |
| Macrochiron sargassi Sars, 1916 | Macrochiron sargassi | 19 |