LICHALP

Diplotomma pharcidium (Ach.) M. Choisy

Syn.: Buellia alboatra (Hoffm.) Th. Fr. var. athroa (Ach.) Th. Fr., Buellia alboatra (Hoffm.) Th. Fr. var. zabotica (Körb.) Th. Fr., Buellia pharcidia (Ach.) Malme, Buellia zabotica (Körb.) Räsänen, Diplotomma athroum (Ach.) Stein, Diplotomma zaboticum Körb., Lecanora pharcidia Ach., Lecidea parasema (Ach.) Ach. var. athroa Ach.

Lichenised.

Substrate: bark, lignum

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 corticolous species of the D. alboatrum-group with relatively large apothecia with a prominent, thick margin, and additionally a thalline veil; usually on smooth bark of deciduous trees (Populus, Fraxinus); an inland species at low elevations; from the Alps there are only some scattered records, but perhaps it was not always distinguished from similar species.