| Name | Plagiochila major S. W. Arnell |
| Authorship | S. W. Arnell |
| Rank | Species |
| Placed in | Plagiochila |
| Citation | 1956 Ill. Moss Fl. Fennoscandia 1: 162 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Plagiochila major S. W. Arnell |
| Identification made in | [no date] (3) |