Global occurrence: Eurasia – Europe | Americas – North America (incl Mexico) | Arctic. Substrate: rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified. Life habit: lichenized (mutualistic with algal photobionts). Thallus: crustose (crustaceous) – episubstratal – unspecified; compartimentized – areolate, squamulate; [th] upper surface: green(ish) grey | yellow(ish) green; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, squamules): discontiguous, dispersed (throughout the thallus); [th] morphol substructures (eg areoles, lobes, branches) upper surface: verrucose, warted. Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (low) 0.4 (high) 1.0 (max) 1.2; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: strongly convex, hemispherical, (sub-)globose; [ascm, if apoth] disc, mazaedium: black(ish); [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: green(ish) grey | yellow(ish) green; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: hyaline, colourless; [ascm] paraphyses/-oids: present; [ascm] paraphyses/-oid cells width [µm]: (low) 1.0 (high) 2.0; [ascm] paraphyses/-oid apical cells width [µm]: (low) 2.5 (high) 3.0; [ascm] epihymenium, epithecium: blue(ish) green (turquoise). Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: amyloid with widening axial body towards the apex (= Lecanora-, Parmelia-, Rinodina-types etc). Ascospores: (median) 8.0; [asp] shape: ellipsoidal; [asp] length [µm]: (min) 9.0 (low) 10.0 (high) 12.0 (max) 13.0; [asp] width [µm]: (low) 4.0 (high) 5.0; [asp] septa: absent – spore lumen unilocular, monolocular | present; [asp] septa: transversely septate; [asp] transversal septa: (median) 1.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent. Conidiomata: absent | present. Conidia: filiform, vermiform; [co] length [µm]: (low) 18.0 (high) 27.0 (max) 30.0. Secondary metabolites: present, usnic acid | zeorin (hopane-6α,22-diol) | unknown/unidentified fatty acid(s). Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid. Secondary photobionts (eg in cephalodia): absent.