Pseudoleptogium diffractum (Kremp. ex Körb.) Müll. Arg.

Syn.: Leptogium diffractum Kremp. ex Körb., Leptogium placodiellum Nyl.
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: a mainly temperate to Mediterranean species found on steeply inclined seepage tracks of hard calcareous rocks; apparently most frequent in the Western and Southern Alps.
Austria: Salzburg; Germany: Schwaben; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Drôme; Savoie; Haute-Savoie; Vaucluse; Var; Italy: Friuli; Trentino Alto Adige; Piemonte; Slovenia: Alpine and Pre-Alpine Slovenia;