Pyrenodesmia citrina Trevis.

Synonyms: Verrucaria citrina Hoffm.; Placodium citrinum Nyl.; Caloplaca citrina Th. Fries
Localirty of collection: Ad basem murorum, saxa et rupes, passim.
Catalogue ID: MSNVE-24970

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.