Pycnora praestabilis (Nyl.) Hafellner

in Hafellner & Türk, Stapfia, 76: 156, 2001. Basionym: Lecidea praestabilis Nyl. - Flora, 57: 13, 1874.
Synonyms: Hypocenomyce praestabilis (Nyl.) Timdal; Hypocenomyce xanthococca auct. non (Sommerf.) P. James & Gotth. Schneid.?; Lecidea xanthococca auct. non Sommerf.
Distribution: N - Frl (Tretiach 2015r), Ven, TAA (Nascimbene & al. 2007b). S - Cal.
Description: Thallus crustose, episubstratic, areolate, the areoles scattered to crowded, up to 1(-1.5) mm wide, adnate, weakly convex, pale grey to yellowish brown, dull. Upper cortex up to 15 µm thick, of thin-walled hyphae. Apothecia lecideine, black, epruinose, up to 1.1 mm across, with a flat disc and a prominent, regular or slightly flexuose proper margin. Proper exciple of closely conglutinated hyphae, brownish black in outer part, dark brown within, K+ violet, N-; epithecium dark brown, without crystals, K+ violet, N-; hymenium colourless, 55-70 µm high; paraphyses sparingly branched and anastomosing, the apical cells hardly swollen; hypothecium brown. Asci 8-spored, broadly clavate, with a well developed, amyloid tholus containing an ocular chamber and a broad axial mass, Lecanora-type. Ascospores 1-celled, hyaline, broadly to narrowly ellipsoid, 7-11.5 x 3-4.5 µm. Pycnidia usually abundant, up to 0.3 mm across, sessile, black, with a dirty green wall reacting K-, N+ violet. Conidia ellipsoid, 3-5.5 x 1.5-2.5 µm. Spot tests: cortex and medulla K+ yellow, C+ red, KC+ red, P+ yellow, UV-. Chemistry: alectorialic acid.
Note: on wood, more rarely on the bark of conifers in the mountains. The record from Calabria (Nimis 1993: 321) needs confirmation.
Growth form: Crustose
Substrata: bark and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: extremely rare
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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(info)

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
Index Fungorum GBIF


Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5265)
2002/05/17



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265



Elena Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB 5265


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php



Felix Schumm - CC BY-SA4.0
[20893], Austria. Kärnten, Eastern Alps, Styrian Fringe Mountains, Koralpe, 12.6 km NE of the centre of Wolfsberg, 100 m WNW of the summit cross of Bärofen, 46°53'25'' N, 14°59'30'' E, 1710 m, on snags of Larix decidua. Leg. J. Hafellner (no 70788) & L. Muggia, 25.6.2006, det. J. Hafellner. DUPLA GRAECENSIA LICHENUM NR. 1173.



Felix Schumm - CC BY-SA4.0
[20893], Austria. Kärnten, Eastern Alps, Styrian Fringe Mountains, Koralpe, 12.6 km NE of the centre of Wolfsberg, 100 m WNW of the summit cross of Bärofen, 46°53'25'' N, 14°59'30'' E, 1710 m, on snags of Larix decidua. Leg. J. Hafellner (no 70788) & L. Muggia, 25.6.2006, det. J. Hafellner. DUPLA GRAECENSIA LICHENUM NR. 1173.



P.L. Nimis - CC BY-SA 4.0
TSB 42071



P.L. Nimis - CC BY-SA 4.0
TSB 42070



P.L. Nimis - CC BY-SA 4.0
TSB 42070



Pier Luigi Nimis - CC BY-SA 4.0
TSB 40963



Pier Luigi Nimis - CC BY-SA 4.0
TSB 40963



P.L. Nimis CC BY SA 4.0
TSB 42071



P.L. Nimis CC BY SA 4.0
TSB 42071