Acarospora imbricatula H. Magn.

Lichenised.
Substrate: siliceous rocks
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: hitherto known only from dry-continental valleys in the Alps, on south-facing slopes, where it is locally common.
Switzerland: Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Italy: Trentino Alto Adige; Valle d'Aosta;