| Name | Arthonia undenaria Nylander |
| Authorship | Nylander |
| Rank | Species |
| Placed in | Arthonia Acharius |
| Citation | 1864 Acta Soc. Sci. Fenn. 7: 482 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Arthonia undenaria Nylander |
| Identification made in | 2016 (1) |
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