| Name | Calopactis singularis Sydow & P. Sydow |
| Authorship | Sydow & P. Sydow |
| Rank | Species |
| Placed in | Calopactis |
| Citation | 1912 Ann. Mycol. 10 (1): 82 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Calopactis singularis Sydow & P. Sydow |
| Identification made in | [no date] (2) |
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