Global occurrence: Eurasia – Europe | Arctic. Substrate: rock, stones, pebbles – unspecified. Life habit: lichenized (mutualistic with algal photobionts). Thallus: crustose (crustaceous) – episubstratal – unspecified, cracked, fissured, fractured, rimose | compartimentized – areolate, squamulate; [th] upper surface: black(ish) | grey(ish); [th marginal and upper surface] specific structures: absent. Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (median) 0.8; [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | distinctly convex; [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: red(dish); [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: hyaline, colourless; [ascm] paraphyses/-oids: present. Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: entirely amyloid (= Catillaria-, Teloschistes-types etc). Ascospores: (median) 8.0; [asp] shape: broadly ellipsoidal; [asp] length [µm]: (low) 12.0 (high) 17.0; [asp] width [µm]: (low) 6.0 (high) 9.0; [asp] septa: absent | present – spore lumen bilocular, polarilocular, plurilocular; transversely septate; [asp] transversal septa: (median) 1.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent. Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid. Secondary photobionts (eg in cephalodia): absent.