| Nominal Species (n = 8) | Present allocation (n = 7) | Ref. |
|---|---|---|
| Hypnea boergesenii T.Tanaka | Hypnea cervicornis | 80701 |
| Hypnea cenomyce J. Agardh | Hypnea cenomyce | 80701 |
| Hypnea cervicornis Agardh, 1851 | Hypnea cervicornis | 3477 |
| Hypnea charoides J.V. Lamouroux | Hypnea charoides | 80701 |
| Hypnea esperi Bory de Saint-Vincent, nom. illeg. | Hypnea esperi | 80701 |
| Hypnea flagelliformis Greville ex J. Agardh | Hypnea flagelliformis | 80701 |
| Hypnea nidulans Setchell | Hypnea nidulans | 80701 |
| Hypnea pannosa J. Agardh | Hypnea pannosa | 80701 |