| Name | Rhizocarpon rittokense (Hellbom) Th. Fries |
| Authorship | (Hellbom) Th. Fries |
| Rank | Species |
| Placed in | Rhizocarpon Ramond ex de Candolle |
| GUID | urn:lsid:indexfungorum.org:names:404080 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Rhizocarpon rittokense (Hellbom) Th. Fries |
| Identification made in | [no date] (2) |