Global occurrence: Eurasia – Europe | Americas – North America (incl Mexico) | Arctic.  Substrate: soil, clay, humus, turf, detritus, dead leaves | bryophytes – mosses, liverworts | rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: squamulose (squamulous); [th] upper surface: green(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | red(dish) | grey(ish) green| green(ish) grey |; [th upper surface]: epruinose | pruinose; [th upper surface] pruina: scarce, sparse, fine | dense; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (min) 2.0; [th] morphol substructures (eg areoles, squamules): contiguous, coherent (throughout the thallus); [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | bullate | pseudocyphellate, with pseudocyphellae; [th] lower surface: green(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon).  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (min) 5.0, (median) 5.0; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex; [ascm, if apoth] disc, mazaedium: black(ish); [ascm, if apoth] disc, mazaedium: epruinose; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | hyaline, colourless; [ascm] paraphyses/-oids: present; [ascm] epihymenium, epithecium: grey(ish) | grey(ish) brown.  Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: amyloid with acuate axial body towards the apex (= Bacidia-, Buellia-, Ramalina-types etc).  Ascospores: (median) 8.0; [asp] shape: elongate-fusiform, ellipsoidal-fusiform | filiform, vermiform; [asp] length [µm]: (low) 11.5 (high) 18.5; [asp] width [µm]: (low) 3.5 (high) 5.0; [asp] septa: present; [asp] septa: transversely septate; [asp] transversal septa: (median) 1.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Secondary metabolites: absent | present, unknown/unidentified fatty acid(s).  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.