Calicium glaucellum Ach.
Syn.: Calicium discoidale Ach.
Lichenised.
Substrate: bark, lignum
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a temperate to boreal-montane, holarctic species found on lignum and acid bark, especially on decorticated stumps of conifers, but also of broad-leaved trees (e.g. on Castanea); widespread in the Alps, but not very common.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Schwaben; Switzerland: Bern; Glarus; Graubünden; Luzern; Schwyz; Unterwalden; Vaud; Valais; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Italy: Friuli; Veneto; Trentino Alto Adige; Slovenia: Alpine and Pre-Alpine Slovenia; Trnovsky Gozd;