Arthonia quercus Trevis.

Synonyms: Arthopyrenia quercus Mass. (Ric. p. 169.)
Localirty of collection: Ad cort. Quercuum juven. in Euganeis, et in prov. Vicetina et Veronensi.
Catalogue ID: MSNVE-24941

All images have been taken by Dr. Maria Zardini. They are property of the Natural History Museum of Venbice, and are distributed under a CC BY licencse.