Distribution: N - Lomb (Anzi E. C. I. II 1123: Printzen 1995).
Description: Thallus crustose, poorly delimited, dark green to green-brown, gelatinous when wet, pseudoparenchymatous, consisting of goniocysts surrounded by hyphae, the outer ones with brown-pigmented walls. Apothecia micareoid, 0.2-0.6 mm across, with a brown to brown-black, strongly convex disc, without a distinct proper margin. Proper exciple very much reduced, of a few thread-like hyphae resembling paraphyses, colourless to brownish; hymenium colourless, with red-brown vertical streaks reacting K+ dark brown, 150-200 µm high, I- (but appearing I+ blue due to the amyloid ascal walls); paraphyses simple or rarely forked in upper part, arranged in densely entangled clusters, with conspicuous septa, 2-3.5(-4) µm thick, not surrounded by a distinct hymenial gel; hypothecium pale brown, scarcely distinguishable from the hymenium. Asci 8-spored, cylindrical-clavate, with relatively thick, multi-layered, amyloid walls, the apical dome with a broad, K/I+ blue plug flattening out at maturity, opening apically with an irregular fissure. Ascospores 1-celled, hyaline to pale brown when overmature, broadly ellipsoid, sometimes apiculate at one or both ends, 25-38 x 13-18 µm, thin-walled. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on humid, bare, clayey or fine-grained sandy soil on track sides or ditch margins in deciduous woodlands, with optimum in the montane belt. Easy to overlook, but certainly not common in Italy.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris