Buellia atrocinerella (Nyl.) Scheid.

Syn.: Lecanora atrocinerella Nyl., Rinodina atrocinerella (Nyl.) Boistel
Lichenised.
Substrate: siliceous rocks
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a species with a brownish-grey thallus and elongated marginal areoles reacting K+ yellow, then red; on siliceous rocks in xerothermic sites at low elevations; in the study area so far only known from the Western Alps (France, Italy).
France: Haute-Alpes; Italy: Liguria;