Pyrenula nitidella (Schaer.) Müll. Arg.

in Engler, Bot. Jahrb., 6: 414, 1885. Basionym: Verrucaria nitida var. nitidella Flörke ex Schaer. - Lich. Helv. Spicil., 2: 58, 1826.
Synonyms: Bunodea nitida var. nitidella (Schaer.) Beltr.; Pyrenula nitida var. dermatodes (Borrer) Trevis.; Pyrenula nitida var. nitidella (Schaer.) Schaer.
Distribution: N - Ven (Ravera & al. 2021b), Lomb (Ravera & al. 2021b), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020), Lig (Giordani & al. 2002, Brunialti & Giordani 2003, Giordani & Incerti 2008, Watson 2014). C - Tosc (Senese & Critelli 2000, Loppi & al, 2004c), Laz (Ravera 2006c, Munzi & al. 2012), Sar (Zedda & al. 2001, Zedda 2002). S - Camp, Pugl (Thüs & Licht 2006), Cal (Puntillo 1996).
Description: Thallus crustose, more or less immersed in the bark, continuous, smooth, olive-brown to pale brown, often with scattered, whitish, punctiform pseudocyphellae. Perithecia black, 0.2-0.35 mm across, numerous, hemispherical to broadly conical, morly immered in the thallus or forming very low projections. Involucrellum closely adhering to the exciple, which appears dark brown throughout, with colourless crystals of calcium oxalates that are insoluble in K; hymenium colourless, not inspersed with oil droplets, the part adjacent to exciple with brown-orange crystals of anthraquinones reacting K+ red (releasing a red solution); hamathecium of branched and anastomosed periphysoids, later substituted by more or less unbranched paraphyses; ostiole with periphyses. Asci 8-spored, narrowly cylindrical, long-stalked, bitunicate, with tholus, thickened at apex with an internal apical beak, non-amyloid. Ascospores 3-septate, brown, thick-walled, narrowly ellipsoid, with diamond-shaped locules, (20-)22-26(-28) x (8-)8.5-11(-12) μm. Photobiont trentepohlioid. Spot tests: thallus: K- or K+ yellow to red-orange around the perithecia, C-, KC-, P-, UV-. Chemistry: anthraquinones in perithecia and sometimes in thallus.
Note: a mild-temperate to Mediterranean-Atlantic species found on the bark of deciduous trees in open, humid woodlands; very rare in the North, more frequent in Tyrrhenian Italy.
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: very rare
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


Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (4184)
2001/11/29


Andres Saag; Owner: University of Tartu



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm - CC BY-SA 4.0
[4223], Germany, Baden-Württemberg, Kreis Schwäbisch Gmünd, im Beutenbachtal bei der Beutenmühle ca. 3 km südöstlich von Lorch, ca 310 m, an Fraxinus, TK 7224. Leg. et det. Schumm 29.05.1995



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50



Felix Schumm CC BY-SA 4.0
13\50


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1055&lang=en
France, Crozon
with P. chlorospila


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1055&lang=en
France, Crozon
with P. chlorospila, which reacts UV+ white


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1055&lang=en
France, Crozon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1055&lang=en
France, Crozon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1055&lang=en
France, Crozon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1055&lang=en
France, Crozon


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


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, Ad alni truncos in opp. Badia Pr. Ver. 20 7bre. 1855
as Bunodea nitida var. nitidella