Placopyrenium trachyticum (Hazsl.) Breuss var. trachyticum
Syn.: Catapyrenium trachyticum (Hazsl.) R. Sant., Dermatocarpon trachyticum (Hazsl.) Vain., Endopyrenium trachyticum Hazsl., Placidiopsis trachytica (Hazsl.) Servít
Lichenised.
Substrate: calciferous rocks, siliceous rocks
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: on base-rich siliceous rocks. This species, frequently confused with P. fuscellum, extends more widely in the submediterranean belt than P. bucekii.
Austria: Kärnten; Niederösterreich (incl. Wien); France: Alpes-Maritimes; Vaucluse; Var; Italy: Piemonte; Valle d'Aosta;