Gyalecta flotowii Körb.

Syn.: Gyalecta truncigena (Ach.) Hepp var. querceti (Nyl.) Boistel, Lecidea querceti Nyl.
Lichenised.
Substrate: bark, living mosses
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a mild-temperate lichen found on broad-leaved trees in clearings of ancient, undisturbed forests, especially in deep fissures of the bark, often on Acer and Fraxinus.
Austria: Tirol; Salzburg; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Switzerland: Unterwalden; France: Alpes-Maritimes; Vaucluse; Var; Italy: Liguria; Slovenia: Alpine and Pre-Alpine Slovenia;