Gyalecta fagicola (Arnold) Kremp.

Syn.: Bacidia fagicola Arnold, Gyalecta corticola (Lönnr.) A.L. Sm., Lecidea congruella Nyl., Pachyphiale corticola Lönnr., Pachyphiale fagicola (Arnold) Zwackh
Lichenised.
Substrate: bark
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: optimum in open deciduous forests, but in humid areas also found on isolated, old trees; widespread throughout the Alps, but generally not common.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Schwaben; Switzerland: Graubünden; Luzern; Schwyz; Valais; France: Vaucluse; Var; Italy: Friuli; Trentino Alto Adige; Slovenia: Alpine and Pre-Alpine Slovenia; Trnovsky Gozd; Liechtenstein