| Name | Arthonia microsperma Nylander |
| Authorship | Nylander |
| Rank | Species |
| Placed in | Arthonia Acharius |
| GUID | urn:lsid:indexfungorum.org:names:376646 |
| Citation | 1887 Flora 70: 74 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Arthonia microsperma Nylander |
| Identification made in | [no date] (2) |
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