Lecanora epibryon (Ach.) Ach. var. epibryon

Lichenogr. Univ.: 396, 1810. Basionym: Lichen epibryon Ach. - Lichenogr. Suec. Prodr.: 79, 1799.
Synonyms: Lecanora subfusca var. hypnorum Rabenh.
Distribution: N - Frl, Ven (Nimis 1994, Caniglia & al. 1999, Nascimbene & Caniglia 2003c, Thor & Nascimbene 2007, Nascimbene 2008c), TAA (Caniglia & al. 2002, Nascimbene 2008, Hafellner 2015, Ertz & al. 2015), Lomb (Dalle Vedove & al. 2004, Ertz & al. 2015), Piem (Isocrono & al. 2004, Morisi 2005), VA (Valcuvia 2000), Emil, Lig. C - Umb (Genovesi & al. 2001, Ravera & al. 2006), Abr (Nimis & Tretiach 1999, Di Nuzzo & al. 2021, Gheza & al. 2021), Mol (Ravera & Genovesi 2012, Genovesi & Ravera 2014).
Description: Thallus crustose, episubstratic, whitish to pale grey, continuous to warted. Apothecia lecanorine, more or less round, sessile, strongly constricted to almost substipitate, 0.5-2(-3) mm across, with a reddish brown, often somewhat shiny, mostly flat disc, and a thick, smooth to crenulate-undulate thalline margin. Thalline exciple to 100 µm thick, containing small, irregular crystals visible under polarized light and not dissolving in K; epithecium red-brown, without crystals, sometimes with small oil droplets; hymenium colourless, 60-90 µm high; paraphyses simple or sparingly branched in upper part, 1.5-2 µm thick, the apical cells slightly thickened and to 3.5 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 or narrowly ellipsoid, 12-19 x 6-9.5 µm. Photobiont chlorococcoid. Spot tests: thallus K+ yellow, C-, KC-, P-, UV-. Chemistry: atranorin and variable amounts of zeorin.
Note: a circumpolar, arctic-alpine species found on mosses and plant debris in open calcareous grasslands and alpine tundras, often on ridges in Carex firma stands, common in the Alps near and above treeline, rarer in the Apennines.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rather common
Subalpine belt: common
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples


Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37378



Juri Nascimbene - CC BY-SA 4.0
Italy, Veneto, Belluno, Vette di Feltre
2016



Juri Nascimbene - CC BY-SA 4.0
Italy, Veneto, Belluno, Vette di Feltre
2016



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41827



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41827



Pier Luigi Nimis CC BY-SA 4.0
TSB 38527



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (815)
2001/11/25



Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007



P.L. Nimis CC BY-SA 4.0
TSB 42420



P.L. Nimis CC BY-SA 4.0
TSB 42420



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37380