Distribution: N - Frl, Ven (Nascimbene & Caniglia 2000, 2003c, Nascimbene & Marini 2007), TAA, Lomb, Piem (Nascimbene & al. 2021), VA (Nascimbene & al. 2021), Emil (Fariselli & al. 2020). C - Marc (Nimis & Tretiach 1999), Abr (Recchia & Villa 1996, Nimis & Tretiach 1999, Gheza & al. 2021), Mol (Nimis & Tretiach 2004, Caporale & al. 2008).
Description: Thallus crustose, indistinct and endosubstratic or episubstratic and consisting of very small, scattered, orange-pink areoles, well-delimited, forming orbicular patches several cm in diam. Apothecia 0.2.1 mm across, at first immersed, then sessile and slightly protruding, with a flat to weakly convex, carmine red to orange-red, smooth disc, and an initially prominent, then thinner, slightly paler, smooth proper margin. Exciple 60-100 μm wide, with very few to no algal cells, prosoplectenchymatous; epithecium orange, K+ red; hymenium colourless, 50-70 mm tall; paraphyses weakly branched in upper part, the terminal cells swollen, to 7 μm wide; hypothecium colourless, usually inspersed with oil droplets. Asci 8-spored, clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, ellipsoid, 8-12 x 3-7 μm, the septum 2-4 μm thick. Spot tests: thallus and apothecia K+ red, C-, KC-, P-. Chemistry: thallus and apothecia with emodin, fallacinal, parietin, parietinic acid, and teloschistin.
Note: on steeply inclined, partially shaded surfaces of calcareous rocks above treeline; known from the mountains of southern Europe, and certainly ranging throughout the Alps.