Calicium quercinum Pers.

Syn.: Calicium curtiusculum Nyl., Calicium decipiens A. Massal., Calicium lenticulare Ach. var. bacillare Ach., Calicium lenticulare Ach. var. curtiusculum (Nyl.) Lettau
Lichenised.
Substrate: lignum, 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: a holarctic, temperate species found on lignum and bark of deciduous trees, more rarely of conifers, especially on old oaks and on Castanea; widespread in the Alps, but generally rare.
Austria: Vorarlberg; Tirol; Oberösterreich; Germany: Oberbayern; Switzerland: Bern; Graubünden; Valais; France: Haute-Savoie; Italy: Lombardia; Piemonte;