| Name | Sphaerotheca castagnei f. bidentis (Fuckel) Saccardo |
| Authorship | (Fuckel) Saccardo |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Sphaerotheca castagnei Léveillé |
| Citation | 1875 Mycoth. Veneta Cent. II. no. 145 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Sphaerotheca castagnei f. bidentis (Fuckel) Saccardo |
| Identification made in | [no date] (1) |
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