| Name | Ectropothecium arnense Brotherus | 
| Authorship | Brotherus | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Ectropothecium | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Ectropothecium arnense Brotherus | 
| Identification made in | [no date] (1) | 
