| Nominal Species (n = 6) | Present allocation (n = 6) | Ref. |
|---|---|---|
| Polyorchis haplus Skogsberg, 1948 | Polyorchis haplus | 1663 |
| Polyorchis karafutoensis Kishinouye, 1910 | Polyorchis karafutoensis | 19 |
| Polyorchis montereyensis Skogsberg, 1948 | Polyorchis montereyensis | 19 |
| Scrippsia pacifica Torrey, 1909 | Scrippsia pacifica | 19 |
| Melicertum penicillatum Eschscholtz, 1829 | Polyorchis penicillatus | 2992 |
| Medusa saltator Tilesius, 1818 | Spirocodon saltator | 2992 |