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Lecanora atrosulphurea (Wahlenb.) Ach.
Family: Lecanoraceae
[Lichen atrosulphureus Wahlenb.,  more]
Lecanora atrosulphurea image
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: compartimentized – areolate, squamulate [th] upper surface: yellow(ish) (if dull: buff) | green(ish) grey | green(ish) yellow [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | granulose, granular ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 0.5 (high) 2.0 (max) 2.5 ascoma: immersed, innate | sessile, superficial [ascm, if apoth] disc, mazaedium: strongly convex, hemispherical, (sub-)globose [ascm, if apoth] disc, mazaedium: black(ish) | green(ish) black [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: yellow(ish) (if dull: buff) | green(ish) grey | green(ish) yellow [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 [ascm] paraphyses/-oid apical cells width [µm]: (low) 3.0 (high) 5.0 [ascm] epihymenium, epithecium: brown(ish) black | blue(ish) brown (violet brown) asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): present [asc] tholus amyloidity pattern: amyloid with widening axial body towards the apex (= Lecanora-, Parmelia-, Rinodina-types etc) ascospores: (median) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (min) 8.0 (low) 11.0 (high) 15.0 (max) 16.5 [asp] width [µm]: (low) 4.0 (high) 5.0 (max) 6.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent conidiomata: absent | present conidia: filiform, vermiform | [cur] – curved, unciform, falcate, sickle-shaped [co] length [µm]: (low) 22.0 (high) 28.0 secondary metabolites: present secondary metabolites: arthothelin | norstictic acid | skyrin (rhodophyscin) | thiophanic acid | usnic acid | zeorin (hopane-6α,22-diol) primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified.