Lecanora pulicaris (Pers.) Ach.

Syn. Meth. Lich.: 336, 1814. Basionym: Patellaria pulicaris Pers. - Ann. Wetter. Gesellsch. Ges. Naturk., 2, 1: 13, 1810.
Synonyms: Lecanora chlarona (Ach.) Nyl. non auct. p.p.; Lecanora coilocarpa (Ach.) Nyl. non auct.; Lecanora detrita (Hoffm.) Ach.; Lecanora gangalea auct.; Lecanora pinastri (Schaer.) H. Magn.; Lecanora pulicaris f. pinastri (Schaer.) Clauzade & Cl. Roux; Lecanora subfusca var. detrita (Hoffm.) A. Massal.; Lecanora subfusca var. pinastri Schaer.
Description: Thallus crustose, usually thin and smooth, white to pale grey, sometimes delimited by a dark prothallus. Apothecia lecanorine, sessile or slightly constricted at base, 0.4-1.3 mm across, with a brown to very dark brown (almost black) disc and a smooth, raised thalline margin. Thalline exciple corticate, the cortex (10-)15-20(-25) µm thick laterally, 25-65 µm thick at base, pulicaris-type, the medullary part with abundant, very large crystals which are insoluble in K, often intermixed with small crystals soluble in K (in poorly developed apothecia crystals may be sparse or absent); epithecium reddish brown, with abundant, fine crystals dispersed between paraphyses, which are soluble in K but not in N; hymenium colourless, not inspersed wit oil droplets, 60-90 µm high; paraphyses simple or sparingly branched in upper part, 1.5-2.5 µm thick at mid-level, the apical cells up 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, broadly ellipsoid, (10-)11-15(-16) x (6.5-)7.5-10 µm, the wall c. 0.8-1 µm thick. Photobiont chlorococcoid. Spot tests: thallus and apothecial margin K+ yellow, C-, KC-, P+ red, more rarely P+ yellow-orange or P-. Chemistry: atranorin (major), often with variable amounts of fumarprotocetraric or more rarely roccellic acid.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: rather common
Montane belt: rather common
Dry submediterranean belt: very rare
Humid submediterranean belt: very rare
Padanian area: extremely rare

pH of the substrata:

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Poleotolerance:

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Altitudinal distribution:

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Rarity

absent
extremely rare
very rare
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common
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extremely common
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Occurrence data
Predictive map
Model ImageCurrent prediction (1981-2010)
Model ImageFuture prediction (2071-2100) SSP 1-2.6
Model ImageFuture prediction (2071-2100) SSP 5-8.5
Predictive maps according to Francesconi et al. 2025

P.L. Nimis CC BY-SA 04
TSB 11878


P.L. Nimis CC BY-SA 4.0
TSB 38041


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


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


Pier Luigi Nimis - CC BY-SA 4.0
TSB 41463


Felix Schumm – CC BY-SA 4.0
[621], Germany, Baden-Württemberg, Kreis Göppingen, Marbachtal bei Zell-Börtlingen. An Laubbäumen in Bachnähe, luftfeucht, lichtoffen, ca. 350 m, TK 7223. Leg. Schumm 7.19.1967, det. J. Poelt.


P.L. Nimis CC BY-SA 4.0
TSB 38041


P.L. Nimis CC BY-SA 04
TSB 41463


P.L. Nimis CC BY-SA 04
TSB 37388


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


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


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


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


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


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


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Lecanora_pulicaris.htm
France, sur genévrier - 24/02/2012 - Col d'Aiti - Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Lecanora_pulicaris.htm
France, sur genévrier - 24/02/2012 - Col d'Aiti - Corse


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=558&lang=en
France, Le Guilvinec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=558&lang=en
France, Le Guilvinec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=558&lang=en
France, Le Guilvinec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=558&lang=en
France, Le Guilvinec


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=558&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=558&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1044&lang=en
France, Les Bouillouses 2000 m
chemo P-


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1044&lang=en
France, Les Bouillouses 2000 m
chemo P-


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1044&lang=en
France, Les Bouillouses 2000 m
chemo P-


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1044&lang=en
France, Les Bouillouses 2000 m
chemo P-


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.


Ulrich Kirschbaum - CC BY 4.0
Germany, Hessen, on twigs of Alnus glutinosa


Ulrich Kirschbaum - CC BY 4.0
Germany, Hessen, on twigs of Alnus glutinosa


Ulrich Kirschbaum - CC BY 4.0
Germany, Hessen, on twigs of Alnus glutinosa


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in op. Asiago 1855
as Lecanora subfusca pinastri