Lecidea tessellata

Crustose saxicolous, on siliceous rocks.
Note: thallus K-, Cl-, KCl-, I+ blue. Epithecium green, hipothecium and thecium colorless. Spores colorless 8,5-11 x 5-6 micras:
Lithology: schist
Altitude: 1.805 m
Municipality: Gérgal