Bacidia polychroa (Th. Fr.) Körb.

Syn.: Bacidia acerina (Ach.) Arnold, Bacidia anceps Anzi, Bacidia fuscorubella (Ach.) Bausch, Bacidia polysita (Stirt.) A.L. Sm., Biatora polychroa Th. Fr., Lecidea acerina (Ach.) Röhl., Secoliga fuscorubella (Ach.) Stizenb., Verrucaria fuscorubella Hoffm. nom. inval.
Lichenised.
Substrate: bark
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a mild-temperate to humid subtropical lichen found on broad-leaved trees in open, humid forests, with a few scattered records from the Alps.
Austria: Kärnten; Steiermark; Niederösterreich (incl. Wien); France: Var; Italy: Trentino Alto Adige; Lombardia; Slovenia: Alpine and Pre-Alpine Slovenia;