Distribution: N - Ven (Lazzarin 2000b), TAA (Watson 2014), Lomb (Jatta 1909-1911), Piem (Jatta 1909-1911), Lig. C - Tosc (Jatta 1909-1911), Abr (Jatta 1909-1911, Gheza & al. 2021), Sar. S - Camp, Cal (Puntillo & Puntillo 2004), Si (Grillo 1998, Grillo & Caniglia 2004).
Description: Thallus crustose, homoiomerous, gelatinous when wet, indistinctly lobed at margin, dark olive-green to brownish black, thin and membranous, best developed around the apothecia. Upper and lower cortex absent. Apothecia frequent, lecanorine, sessile, up to 3.5 mm across, with a brown to black, flat to convex disc and a thick, often verrucose or lobulate thalline margin. Exciple very poorly developed; epihymenium brownish; hymenium colourless, I+ blue; paraphyses simple or sparingly branched, with clavate to subglobose tips; hypothecium colourless. Asci (2-)4-spored, clavate, the apex thick, with a I+ blue apical dome and a I+ blue annulus projecting downwardly. Ascospores muriform, hyaline, ellipsoid to subovoid with rounded ends, 25-35 x 10-15 µm. Pycnidia rare, immersed or protruding, appearing as small reddish dots. Conidia straight, bacilliform, 5-6 x 1-1.5 µm. Photobiont cyanobacterial (Nostoc, in long chains). Spot tests: all negative. Chemistry: without lichen substances.
Note: a holarctic, temperate to boreal-montane, short-lived species of mineral, clay soil in disturbed habitats, certainly overlooked, but never common in Italy.
Growth form: Foliose, broad lobed
Substrata: soil, terricolous mosses, and plant debris