Global occurrence: Eurasia – Europe. Substrate: rock, stones, pebbles – unspecified. Life habit: lichenized (mutualistic with algal photobionts). Thallus: crustose (crustaceous) – episubstratal – unspecified; thallus: compartimentized – areolate, squamulate; [th] upper surface: grey(ish); [th marginal and upper surface] specific structures: absent | present; [th margin] cilia, cilioid structures: absent; [th upper surface] isidia, isidioid structures: absent; [th upper surface] soredia, soralia, soralioid structures: absent | present; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (min) 0.5; ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (min) 1.5;; [ascm, if apoth] disc, mazaedium: black(ish); [ascm] paraphyses/-oids: present. 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: elongate-fusiform, ellipsoidal-fusiform; [asp] length [µm]: (min) 18.0 (low) 21.0 (high) 25.0 (max) 30.0; [asp] width [µm]: (low) 5.0 (high) 8.0; [asp] septa: present; [asp] septa: transversely septate; [asp] transversal septa: (min) 1.0(median) 3.0; [asp] pigmentation: hyaline, colourless. Secondary metabolites: present, atranorin | stictic acid. Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid. Secondary photobionts (eg in cephalodia): absent | present.