| Name | Fossombronia longiseta Austin |
| Authorship | Austin |
| Rank | Species |
| Placed in | Fossombronia |
| Citation | 1870 Proc. Acad. Nat. Sci. Philadelphia 21: 228 |
| Holdings | 16 Specimens held in the Harvard University Herbaria identified as Fossombronia longiseta Austin |
| Identification made in | [no date] (16) |