Arthonia caesiella Nyl.
Syn.: Arthonia aphthoides Flagey, Arthonia aphthosa Flagey, Arthonia galactiformis Flagey
Lichenised.
Substrate: bark
Altitudinal distribution: submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: a species with bluish grey-pruinose ascomata, based on a type from extra-Alpine Southern France.
