Lecanora atromarginata (H. Magn.) Hertel & Rambold

in Elvebakk & Hertel, Norsk Polarinst. Skr., 198: 1996. Basionym: Lecidea atromarginata H. Magn. Meddel. Göteb. Bot. Trädg. - 6: 95, 1931 (“1930”).
Synonyms:
Description: Thallus crustose, episubstratic, continuous to rimose, pale lemon yellow to yellowish green, rarely whitish, forming up to 1 cm wide, sometimes coalescing patches, often delimited by a thin, white or black prothallus. Apothecia lecideine (rarely appearing lecanorine when very young), black, at first half-immersed, then subsessile, rounded to slightly irregular in outline, 0.4-0.8(-1.2) mm across, with an epruinose, flat to convex disc and a soon excluded proper margin; thalline margin present only in very young apothecia, very soon excluded. Proper exciple brownish green in outer part, colourless within; epithecium yellow-green to green-black; hymenium colourless (35-)50-75 µm high; paraphyses simple or sparsely branched and anastomosing, 1.5-2.5 µm thick at mid-level, the apical cells 3.5-5-5(-6) µm wide; hypothecium colourless. Asci 8-spored, clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, (8-)10-12(-14) x (4-)5-6(-7.5) µm. Pycnidia frequent, black. Conidia worm-like, curved, 11-15 x 0.5-1 µm. Photobiont chlorococcoid. Spot tests: thallus and apothecial margin K- or K+ yellow, C-, KC+ yellowish, P- or P+ weakly orange, UV-. Chemistry: usnic acid, stictic acid complex.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: rare
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent

pH of the substrata:

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Poleotolerance:

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Altitudinal distribution:

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Rarity

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Occurrence data
Predictive map

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Austria, Lindersee
2014


Source: Images of Lichen Types in Herbarium O (Oslo) - http://nhm2.uio.no/typephotos/lichens/typephotoS.php?f=O-L-000696d_s.jpg
RUSSIA: Nov. Semlja: Moræne ved Vasnetsoff Bræ, Matotchkin Shar, 1921.07.22, Lynge, B. .
Herbarium: SYNTYPE O


Images of Lichen Types in Herbarium O (Oslo) - http://nhm2.uio.no/typephotos/lichens/typephotoS.php?f=O-L-000696d_s.jpg RUSSIA: Nov. Semlja: Moræne ved Vasnetsoff Bræ, Matotchkin Shar, 1921.07.22, Lynge, B. . Herbarium: SYNTYPE O


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Austria, Lindersee
2014


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Austria, Lindersee
2014


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Austria, Lindersee
2014


Wolfgang von Brackel - CC BY-4.0
Greenland, Qassiarsuk