Global occurrence: Eurasia – Europe | Americas – North America (incl Mexico). Substrate: soil, clay, humus, turf, detritus, dead leaves | bryophytes – mosses, liverworts. Life habit: lichenized (mutualistic with algal photobionts). Thallus: crustose (crustaceous) – endosubstratal | squamulose (squamulous), inconspicuous, immersed; [th] upper surface: blue(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | brown(ish) green (olivaceous, olive green); [th marginal and upper surface] specific structures: absent; [th upper surface]: epruinose; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (min) 0.5; [th] lower surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon); [th lower surface] specific structures: absent. Ascomata: absent | present; ascoma: perithecial, perithecioid – hymenial; ascoma [mm]: (low) 0.4 (high) 0.45; ascoma: subsessile, subimmersed, adnate, semi-immersed, emergent; [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish); [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon); [ascm] paraphyses/-oids: present. Asci: fissitunicate – bitunicate; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): absent. Ascospores: (low) 2.0 (high)8.0; [asp] shape: oblong, oblong-obtuse; [asp] length [µm]: (min) 25.0 (low) 28.0 (high) 44.0; [asp] width [µm]: (low) 8.0 (high) 12.0; [asp] septa: absent – spore lumen unilocular, monolocular | present, transversely septate; [asp] transversal septa: (median) 1.0; [asp] pigmentation: hyaline, colourless | pale brown | medium brown, brownish; [asp] perispore, epispore: not apparent | ornamented, rough, warted, striate, cracked. Secondary metabolites: absent. Primary photobiont: present, cyanobacterial. Secondary photobionts (eg in cephalodia): absent.