Acarospora similis H. Magn.

Lichenised. Poorly known taxon.
Substrate: lignum
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a lignicolous taxon of the A. veronensis-group, often found on roofing tiles, based on a type from outside the Alps (Switzerland), with a few records from the Alps.
France: Haute-Savoie; Italy: Trentino Alto Adige;