Global occurrence: Oceania – Australasia | Eurasia – Europe | Arctic.  Substrate: soil, clay, humus, turf, detritus, dead leaves | bryophytes – mosses, liverworts | bark, cork, plant surface – trunks, branches, twigs | rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: leprose, leprarioid, powdery, byssoid; thallus: granular, granulose, granulate; [th] upper surface: white(ish) | blue(ish) grey | green(ish) white | yellow(ish) white (ivory, off-white, cream-coloured); [th marginal and upper surface] specific structures: present; [th margin] cilia, cilioid structures: absent; [th upper surface] isidia, isidioid structures: absent; [th upper surface] soredia, soralia, soralioid structures: present; [th] morphol substructures (eg areoles, lobes, branches) upper surface: granulose, granular.  Ascomata: absent.  Secondary metabolites: present, angardianic acid | atranorin | jackinic acid | norrangiformic acid | porphyrilic acid | rangiformic acid | roccellic acid | norjackinic acid | unknown/unidentified anthraquinone(s).  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.