Global occurrence: Eurasia – Europe | Arctic.  Substrate: rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified; continuous, diffuse, effuse | cracked, fissured, fractured, rimose; [th] upper surface: grey(ish) | yellow(ish) (if dull: buff) | white(ish) grey; [th marginal and upper surface] specific structures: absent.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (min) 0.35 (low) 0.45(median) 0.5 (high) 0.6 (max) 2.0; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: subconvex, slightly convex | convex | distinctly convex; [ascm, if apoth] disc, mazaedium: red(dish) | red(dish) yellow (orange, orange yellow) | brown(ish) red (carneous); [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: red(dish); [ascm, if apoth] margin excipular photobionts: absent; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: red(dish) | hyaline, colourless | red(dish) yellow (orange, orange yellow) | red(dish) brown (if pale: orange brown) | yellowish hyaline; [ascm] paraphyses/-oids: present; [ascm] paraphyses/-oid cells width [µm]: (low) 2.0(median) 3.0 (high) 3.5; [ascm] paraphyses/-oid apical cells width [µm]: (low) 3.0(median) 3.7 (high) 4.0; [ascm] epihymenium, epithecium: red(dish) | red(dish) yellow (orange, orange yellow) | yellow(ish) red (orange red).  Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc).  Ascospores: (median) 8.0; [asp] shape: globose, spherical | subglobose, subspherical; [asp] length [µm]: (min) 5.0 (low) 7.5(median) 8.4 (high) 9.0; [asp] width [µm]: (min) 5.0 (low) 7.5(median) 7.8 (high) 8.5; [asp] septa: absent – spore lumen unilocular, monolocular; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Conidiomata: absent | present.  Conidia: cylindrical | bacilliform, bacillary.  Secondary metabolites: present, unknown/unidentified anthraquinone(s).  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid. Secondary photobionts (eg in cephalodia): absent.