| Name | Arthonia didyma Körber |
| Authorship | Körber |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Arthonia Acharius |
| Remarks | Denkschr. Feier fünfz. Best. her. Schles. Gesellsch. Vaterl. Kultur: 235 (1853) |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Arthonia didyma Körber |
| Identification made in | 2017 (1) |
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