| Name | Neobryum costatum R. S. Williams |
| Authorship | R. S. Williams |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Neobryum |
| Citation | 1925 Bryologist 28: 597 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Neobryum costatum R. S. Williams |
| Identification made in | [no date] (2) |