| Name | Syntrichia costesii (Thériot) R. H. Zander |
| Authorship | (Thériot) R. H. Zander |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Syntrichia Bridel |
| Citation | 1993 Bull. Buffalo Soc. Nat. Sci. 32: 269 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Syntrichia costesii (Thériot) R. H. Zander |
| Identification made in | 2005 (2) |