| Name | Hypnea nigrescens f. tenuior J. Agardh |
| Authorship | J. Agardh |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Hypnea nigrescens Greville ex J. Agardh |
| Remarks | Created from Taxon Name Import: Hypnea nigrescens f. tenuior J. Agardh |
| GUID | urn:lsid:marinespecies.org:taxname:553137 |
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