| Name | Macromitrium fragilicuspis Cardot |
| Authorship | Cardot |
| Rank | Species |
| Placed in | Macromitrium |
| Citation | 1909 Rev. Bryol. 36: 109 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Macromitrium fragilicuspis Cardot |
| Identification made in | 2024 (1) |