| Name | Ectropothecium caloosiense (Austin) E. Britton |
| Authorship | (Austin) E. Britton |
| Rank | Species |
| Placed in | Ectropothecium |
| Citation | 1904 Bryologist 7: 50 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Ectropothecium caloosiense (Austin) E. Britton |
| Identification made in | [no date] (2) |