| Name | Isopterygium perminutum E. B. Bartram | 
| Authorship | E. B. Bartram | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Isopterygium | 
| Citation | 1946 Bryologist 49: 122 | 
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Isopterygium perminutum E. B. Bartram | 
| Identification made in | [no date] (1), 1988 (1), 2014 (1) | 
