Lecania cyrtellina (Nyl.) Sandst.

Abh. Naturw. Ver. Bremen, 21: 184, 1912. Basionym: Lecanora cyrtellina Nyl. - Flora 56: 18, 1873.
Synonyms: Lecidea cyrtellina (Nyl.) Lettau
Distribution: N - VG (TSB 5262), Ven (Nascimbene & al. 2021), Lomb (Gheza & al. 2022b), VA (Ongaro & al. 2022), Emil (Fariselli & al. 2020). C - Laz (Ravera & Genovesi 2008), Abr (Nascimbene & al. 2021), Mol (Paoli & al. 2015, Caporale & Ravera 2020), Sar (Cossu 2013). S - Cal, Si (Campisi & al. 2020).
Description: Thallus crustose, thinly episubstratic, smooth to slightly verrucose, continuous to slightly rimose, whitish, yellowish white or greenish white, poorly delimited. Apothecia lecanorine at least when young, sessile, often clustered, 0.1-0.3 mm across, with a soon convex, beige to pale orange-brown disc which is translucent and brown-mottled when moist, a soon excluded, thin, dull whitish to pale brown thalline margin, and a usually dark proper margin. Proper exciple thin, brownish; epithecium pale yellow; hymenium colourless, 30-40(-45) µm high, I+ blue turning reddish; paraphyses coherent, the apical cells 2.6-4.4 µm thick; hypothecium colourless. Asci 8-spored, clavate, with a K/I+ blue apical dome penetrated by a narrow, K/I- apical cushion surrounded by a narrow, deeply K/I+ blue zone, the wall K/I- but surrounded by an I+ red-brown, K/I+ blue outer layer, the ocular chamber relatively small, Biatora-type. Ascospores 1-celled to more rarely 1-septate, hyaline, fusiform, 8-13(-15) x 2-3(-4) µm. Pycnidia dark, immersed. Microconidia curved, 12-18 x c. 0.5 µm; macroconidia 0-1-septate, crescent-shaped, 10-15(-18) x 1.5-2 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on the base-rich bark of more or less isolated deciduous trees. This species was not always distinguished from L. cyrtella by Italian authors. For further details see Reese Næsborg (2008).
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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


Felix Schumm – CC BY-SA 4.0



Domenico Puntillo; Owner: Domenico Puntillo
Italy



Felix Schumm – CC BY-SA 4.0
[13252], Baden-Württemberg, Kreis Göppingen, SW Oberberken, an Sorbus in Waldlichtung bei der Triebhütte an der Beckenschlagstr. Richtung Baiereck, ca. 500 m, TK 7223, Schumm, 29.07.2007.



Felix Schumm – CC BY-SA 4.0
[13252], Baden-Württemberg, Kreis Göppingen, SW Oberberken, an Sorbus in Waldlichtung bei der Triebhütte an der Beckenschlagstr. Richtung Baiereck, ca. 500 m, TK 7223, Schumm, 29.07.2007.



Felix Schumm – CC BY-SA 4.0
[13252], Baden-Württemberg, Kreis Göppingen, SW Oberberken, an Sorbus in Waldlichtung bei der Triebhütte an der Beckenschlagstr. Richtung Baiereck, ca. 500 m, TK 7223, Schumm, 29.07.2007.



Felix Schumm – CC BY-SA 4.0
[13252], Baden-Württemberg, Kreis Göppingen, SW Oberberken, an Sorbus in Waldlichtung bei der Triebhütte an der Beckenschlagstr. Richtung Baiereck, ca. 500 m, TK 7223, Schumm, 29.07.2007.


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)



Felix Schumm – CC BY-SA 4.0
[13630]



Felix Schumm – CC BY-SA 4.0
[13630]



Felix Schumm – CC BY-SA 4.0
[13630]


Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (17132)
2002/12/13