| Name | Polysiphonia subtilissima Montagne |
| Authorship | Montagne |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Polysiphonia Greville |
| Remarks | Created from Taxon Name Import: Polysiphonia subtilissima Montagne |
| GUID | urn:lsid:marinespecies.org:taxname:144674 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Polysiphonia subtilissima Montagne |
| Identification made in | [no date] (2) |
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