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Myriolecis albescens (Hoffm.) Śliwa, Zhao Xin & Lumbsch (redirected from: Lecanora albescens)
Family: Lecanoraceae
[Lecanora albescens (Hoffm.) Branth & Rostrup,  more]
Myriolecis albescens image

Global occurrence: Eurasia – Asia Extratropical | Eurasia – Europe | Americas – South and Central America | Eurasia – Asia Tropical | Arctic.  Substrate: rock – calcareous, calciferous, basic.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: crustose (crustaceous) – episubstratal – unspecified; continuous, diffuse, effuse; [th] upper surface: white(ish) | white(ish) grey; [th upper surface]: epruinose; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) upper surface: verrucose, warted.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (median) 1.0 (max) 1.5; [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded; [ascm, if apoth] disc, mazaedium: grey(ish) | green(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | green(ish) brown (olive brown) | yellow(ish) brown | white(ish) red (rose); [ascm, if apoth] disc, mazaedium: epruinose | pruinose; [ascm, if apoth] disc, mazaedium pruina: scarce, sparse, fine;[ascm] paraphyses/-oids: present.  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] length [µm]: (low) 8.0 (high) 15.0; [asp] width [µm]: (low) 4.0 (high) 7.0; [asp] septa: absent – spore lumen unilocular, monolocular; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Secondary metabolites: present; 2,7-dichlorolichexanthone.  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.