Caloplaca alnetorum Giralt, Nimis & Poelt

Syn.: Athallia alnetorum (Giralt, Nimis & Poelt) Arup, Frödén & Søchting, Caloplaca flavorubescens auct. non (Huds.) J.R. Laundon
Lichenised.
Substrate: bark
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 species growing on broad-leaved trees; most common in humid areas in the mountains; widespread in the Alps, but overlooked, or confused with other taxa.
Austria: Tirol; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); France: Alpes-de-Haute-Provence; Savoie; Italy: Veneto; Trentino Alto Adige; Liechtenstein