| Name | Calothrix fuscoviolacea P. Crouan & H. Crouan ex Bornet & Flahault |
| Authorship | P. Crouan & H. Crouan ex Bornet & Flahault |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Calothrix C. Agardh ex Bornet & Flahault |
| Remarks | as 'fusco-violacea' |
| Citation | 1886 Ann. Sci. Nat., Bot. Septième série 3: 352 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calothrix fuscoviolacea P. Crouan & H. Crouan ex Bornet & Flahault |
| Identification made in | [no date] (1) |