| Name | Arthonia siderea Degelius |
| Authorship | Degelius |
| Rank | Species |
| Placed in | Arthonia Acharius |
| GUID | urn:lsid:indexfungorum.org:names:364243 |
| Citation | 1942 Ark. Bot. 30A(1): 14 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Arthonia siderea Degelius |
| Identification made in | [no date] (3) |
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