Global occurrence: Arctic. Substrate: lichens, lichenized fungi. Life habit: lichenized (mutualistic with algal photobionts). Thallus: crustose (crustaceous) – episubstratal – unspecified; thallus: compartimentized – areolate, squamulate; [th] upper surface: white(ish) yellow; [th upper surface]: epruinose; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.5 (high) 1.5; [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane; [th] medulla amyloidity: present. Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (min) 1.0; [ascm, if apoth] disc, mazaedium: black(ish); [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish); [ascm, if apoth] margin excipular photobionts: absent; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon); [ascm] paraphyses/-oids: present; [ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon). Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: with amyloid cap (= Icmadophila-, Lecidea-, Pertusaria-types etc). Ascospores: (median) 8.0; [asp] shape: broadly ellipsoidal; [asp] length [µm]: (low) 22.0 (high) 32.0; [asp] width [µm]: (low) 12.0 (high) 16.0; [asp] septa: present; muriformly septate – muriform, submuriform; [asp] pigmentation: dark brown; [asp] perispore, epispore: thick, distincly halonate. Secondary metabolites: present.