Dermatocarpon saxorum Trevis.

Synonyms: Endocarpon saxorum Chaillet (in Fries L. eur. p. 106-1831); Dermatocarpon monstrosum Th. Fries; Verrucaria Schaereri Nyl. non alior.
Localirty of collection: Ad saxa in montibus Septem Communium.
Catalogue ID: MSNVE-24797

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.