Distribution: N - TAA, Piem (TSB 25923). C - Marc (Nimis & Tretiach 1999), Sar (Zedda 2002, 2002b). S - Camp (Nimis & Tretiach 2004, Garofalo & al. 2010), Pugl (Nimis & Tretiach 1999).
Description: Thallus crustose, effuse, thinly episubstratic, membranous or granulose, grey to brownish grey. Apothecia lecideine, sessile, 0.5-1 mm across, red-brown to brown-black, with a concave to finally slightly convex disc and a darker, raised, smooth, glossy, often flexuose, finally excluded proper margin. Proper exciple reddish brown to brown-black, K-; epithecium almost colourless to pale brown, with scattered blue-violet, K+ green granules which are often present also in the upper part of hymenium; hymenium colourless, amyloid; paraphyses coherent, 1.5-1.7 µm thick, mostly simple, the apices gradually widening to 2.5 µm; hypothecium reddish brown. Asci 8-spored, clavate, with a I+ blue tholus and an internal, darker I+ tubular structure, the external gel I+ faintly blue, Porpidia-type. Ascospores 1-celled (rarely 1-septate), hyaline, ellipsoid 10-24(-31) x 3-4.5(-5) µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV+ white. Chemistry: without lichen substances.
Note: optimum in open humid forests, on mosses at the base of old boles, sometimes on soil.