| Name | Conostomum tetragonum (Hedwig) Lindberg |
| Authorship | (Hedwig) Lindberg |
| Rank | Species |
| Placed in | Conostomum |
| Citation | 1863 Öfvers. Kongl. Vetensk.-Akad. Förh. 20(7): 392 |
| Holdings | 62 Specimens held in the Harvard University Herbaria identified as Conostomum tetragonum (Hedwig) Lindberg |
| Identification made in | [no date] (61), 2018 (1) |