Buellia erubescens Arnold

Syn.: Buellia disciformis (Fr.) Mudd var. saprophila (Ach.) Mudd, Buellia jorgei Samp., Buellia parasema De Not. var. saprophila (Ach.) Körb., Buellia zahlbruckneri J. Steiner non sensu T. Schauer, Lecidea parasema (Ach.) Ach. var. saprophila Ach.
Lichenised.
Substrate: bark, lignum, living mosses
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: on acid and smooth bark in warm-humid areas; the distribution in the Alps is very poorly known: all earlier records of this species from upland areas of the Alps refer to Tetramelas chloroleucus (see Nimis 2016).
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Schwaben; Switzerland: Bern; Glarus; Graubünden; Luzern; Schwyz; Ticino; Unterwalden; Valais; France: Var; Slovenia: Alpine and Pre-Alpine Slovenia;