Acarospora microcarpa (Nyl.) Wedd.

Syn.: Acarospora tersa (Fr.) J. Steiner, Lecanora schleicheri (Ach.) Nyl. var. microcarpa Nyl., Lecanora tersa (Fr.) Nyl.
Lichenised.
Substrate:
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: a mainly Mediterranean-Atlantic species with optimum in coastal situations; on basic siliceous rocks wetted by rain, parasitic on several crustose lichens, especially Diploschistes actinostoma; extremely rare in the dry-continental valleys of the Alps.
Italy: Trentino Alto Adige; Piemonte;