| Name | Tetrapyrgos nigripes (Fries) E. Horak |
| Authorship | (Fries) E. Horak |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Tetrapyrgos E. Horak |
| Citation | 1897 ["1896"] Sydowia 39: 102 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Tetrapyrgos nigripes (Fries) E. Horak |
| Identification made in | 2013 (1) |