| Name | Trypethelium mastoideum (Acharius) Acharius |
| Authorship | (Acharius) Acharius |
| Rank | Species |
| Placed in | Trypethelium Sprengel |
| Citation | 1810 Lichenogr. Universalis 307 |
| Holdings | 29 Specimens held in the Harvard University Herbaria identified as Trypethelium mastoideum (Acharius) Acharius |
| Identification made in | [no date] (29) |
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