Chaenotheca hispidula (Ach.) Zahlbr.

Syn.: Calicium aciculare (Gray) Fr., Calicium hispidulum (Ach.) Ach., Calicium trachelinum (Ach.) Ach. var. hispidulum Ach., Chaenotheca acicularis (Gray) Zwackh, Chaenotheca chlorella (Ach.) Müll. Arg. var. hispidula (Ach.) Vain., Chaenotheca chlorelloides (Anzi) Zahlbr., Cyphelium aciculare (Gray) Arnold, Cyphelium chlorelloides Anzi, Phacotium aciculare (Gray) Trevis., Phacotium hispidulum (Ach.) Trevis.
Lichenised.
Substrate: bark
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a cool-temperate, probably holarctic lichen found in dry hollows and undersides, and on the bases of ancient trees, especially oaks, in humid deciduous forests.
Austria: Vorarlberg; Tirol; Salzburg; Steiermark; Oberösterreich; Germany: Oberbayern; Schwaben; Switzerland: Glarus; Graubünden; Schwyz; Unterwalden; Valais; Italy: Veneto; Trentino Alto Adige; Lombardia; Piemonte;