| Name | Macrosporium tenuissimum (Kunze) Fries: Fries |
| Authorship | (Kunze) Fries: Fries |
| Rank | Species |
| Placed in | Macrosporium |
| Citation | 1832 Syst. Mycol. 3(2): 374 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Macrosporium tenuissimum (Kunze) Fries: Fries |
| Identification made in | [no date] (1) |