Bacidia igniarii (Nyl.) Oxner

Syn.: Bacidia abbrevians (Nyl.) Th. Fr., Bilimbia igniarii (Nyl.) Arnold, Lecidea igniarii Nyl.
Lichenised. Poorly known taxon.
Substrate: 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 northern species of smooth bark, very rarely found on lignum; on the whole a critical taxon, which needs revision, with a few scattered records from the Alps.
Germany: Oberbayern; Switzerland: Graubünden; France: Alpes-Maritimes; Vaucluse; Italy: Trentino Alto Adige; Lombardia; Piemonte;