| Name | Achnanthidium coarctatum Brébisson ex W. Smith |
| Authorship | Brébisson ex W. Smith |
| Rank | Species |
| Placed in | Achnanthidium Kützing |
| Citation | 1855 Ann. Mag. Nat. Hist. 15: 1-9 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Achnanthidium coarctatum Brébisson ex W. Smith |
| Identification made in | [no date] (1) |
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