| Name | Schizosiphon crustiformis Nägeli ex Kützing |
| Authorship | Nägeli ex Kützing |
| Rank | Species |
| NomenclaturalStatus | NomInvalid |
| Placed in | Schizosiphon Kützing |
| Remarks | Bornet & Flahault (Ann. Sci. Nat.., ser. 7, 3: 366. 1886) treated "Schizosiphon crustiformis" as a synonym of Calothrix parietina Thuret ex Bornet & Flahault |
| Citation | 1849 Sp. Alg. [Kützing] 328 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Schizosiphon crustiformis Nägeli ex Kützing |
| Identification made in | [no date] (1) |