Lemmopsis arnoldiana (Hepp) Zahlbr.

Syn.: Physma arnoldianum Hepp, Psorotichia arnoldiana (Hepp) Körb., Pyrenocarpus arnoldianus (Hepp) Trevis.
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: on calcareous pebbles in shaded woodland floors and crevices in rocky querries, sometimes on mortar; perhaps overlooked in the Alps, but certainly not common.
Austria: Steiermark; Niederösterreich (incl. Wien); Germany: Oberbayern; Switzerland: ?Luzern; France: Savoie; Haute-Savoie; Italy: Liguria; Slovenia: Alpine and Pre-Alpine Slovenia;