Global occurrence: Eurasia – Europe | Arctic.  Substrate: rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: fruticose (fruticous), shrub-like, beard-like; continuous, diffuse, effuse; [th] upper surface: black(ish); [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.12 (high) 0.2; [th] morphol substructures (eg areoles, squamules): contiguous, coherent (throughout the thallus); [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane; [th] morphol substructures (eg lobes, branches): isotomic-dichotomous.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]:  (low) 0.15 (high) 0.2; [ascm, if apoth] disc, mazaedium: red(dish) brown (if pale: orange brown); [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.  Asci: prototunicate; [asc] tholus: not thickened; [asc] tholus amyloidity (iodine reaction): absent.  Ascospores: (median) 8.0; [asp] shape: globose, spherical | broadly ellipsoidal; [asp] length [µm]: (low) 10.0 (high) 14.0; [asp] width [µm]: (low) 8.0 (high) 11.0; [asp] septa: absent – spore lumen unilocular, monolocular; [asp] pigmentation: hyaline, colourless.  Conidiomata: absent | present.  Conidia: fusiform; [co] length [µm]: (low) 15.0 (high) 23.0.  Primary photobiont: present, cyanobacterial.  Secondary photobionts (eg in cephalodia): absent.