Lecanoropsis albellula (Nyl.) Ivanovich

in Ivanovich & al., Phytotaxa, 695, 1: 27, 2025. Basionym: Lecidea albellula Nyl. - Not. Sällsk. Fauna Fl. Fenn. Förh., Ny Ser. 8: 147, 1866.
Synonyms: Lecanora aitema f. glaucella (Flot.) Anzi; Lecanora albellula (Nyl.) Th. Fr.; Lecanora cembricola Nyl.; Lecanora effusella Hedl.; Lecanora glaucella (Flot.) Nyl.; Lecanora ochromma Nyl.; Lecanora ochrostoma Hepp; Lecanora ochrostomoides Nyl.; Lecanora piniperda Körb.; Lecanora piniperda var. glaucella (Flot.) Körb.
Distribution: N - Frl, Ven (TSB 7812), TAA (Nascimbene & al. 2014, 2022, Nascimbene 2014, Nascimbene & Marini 2015, Trindade & al. 2021, Ivanovich & al. 2025), Lomb (Valcuvia & Truzzi 2007b), Piem (Isocrono & al. 2004), VA (Valcuvia 2000), Emil (van den Boom & Brand 2008, Fariselli & al. 2020), Lig. C - Tosc, Abr (Nimis & Tretiach 1999). S - Cal (Puntillo 1996, van den Boom & Brand 2008), Si (Falco Scampatelli 2005).
Description: Thallus crustose, endo- to episubstratic, continuous or warted-areolate, pale grey, yellowish green to ochre or greyish beige, the areoles rounded or irregularly incised, 0.1-0.2 mm wide, slightly to strongly convex, ecorticate. Apothecia lecanorine, usually crowded, round, sessile and constricted at base, 0.2-0.35. mm across, with a beige, ochre, to dark grey/brown, rarely finely white- or bluish-pruinose, flat to convex disc, and a weakly prominent to level, smooth to crenulate, persistent to often finally excluded thalline margin. Thalline exciple of short-celled hyphae, 50-85 µm wide laterally, 20-35 µm wide at base, corticate, with golden-brown granules in the algal layer and in the outer edges of the cortex, the cortex (12-)18-26(-29) µm wide laterally, (18-)23-43(-48) µm wide at base; proper exciple inapparent; epithecium colourless or spotted greyish brown, covered by an epipsamma of golden-brown granules soluble in K, 5-15(-20) µm high, N+ at least partially reddish violet; hymenium colourless, (37-)43-62(-68) µm high; paraphyses simple or sparingly branched and anastomosing, 1-2.5 µm thick, the apical cells to 3.5 µm wide; hypothecium colourless or pale yellow-brown, (60-)72-103(-130) µm high. 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 (some of them sometimes 1-septate), hyaline, narrowly ellipsoid, (6.8-)8.6-11(-15.3) x (3.4-)3.7-4.5(-7) µm. Pycnidia semi-immersed, brown to colourless in upper part. Conidia of four types: a) 1(-3)-septate and slightly curved macroconidia (not rare) measuring 7-12 x 1.5-2 µm; b) 1-celled and curved, microconidia (not rare) measuring 8-10 x 1-2 µm; c) 1-celled and straight-bacilliform mesoconidia (rare) measuring 3-4 x 1-2 µm, d) 1-celled, thread-like, curved leptoconidia measuring 10-15 x c. 1 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ faintly yellow, C-, KC- or KC+ faintly yellow, P-, UV-. Chemistry: thallus with isousnic acid (major) and variable amounts of pseudoplacodiolic acid; epithecium with a mixture of the Cinereorufa-green and an unknown yellow-brown pigment.
Note: a probably circumboreal-montane species of hard lignum and acid bark, usually in upland areas, with a mainly western distribution in Europe; certainly widespread throughout the Alps, and becoming rarer southwards. For further details see Printzen (2001), van den Boom & Brand (2008) and Ivanovich & al. (2025).
Growth form: Crustose
Substrata: bark and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: rather common
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:

12345

(info)

Solar irradiation:

12345

(info)

Aridity:

12345

(info)

Eutrophication:

12345

(info)

Poleotolerance:

0123

(info)

Altitudinal distribution:

123456

(info)


Predictive model
Herbarium samples


P.L. Nimis CC BY-SA 04
TSB 10506



P. L. Nimis CC BY-SA 4.0
TSB 10506


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_4/Lecanora_albellula.htm
France, Névache, la Clarée, 1588 m - Hautes-Alpes
31/5/2017



Felix Schumm - CC BY-SA 4.0
[ABL79926 Brazil, Mato Grosso do Sul, Jateí, Parque Estadual das Várzeas do Rio Ivinhema, in marsh forest on wood. 22°54’ S, 53°45’ W, 240 m. Leg. A. Aptroot (no 79926 24.09.2019, det. A. Aptroot, 2019.



Felix Schumm - CC BY-SA 4.0
[ABL79926 Brazil, Mato Grosso do Sul, Jateí, Parque Estadual das Várzeas do Rio Ivinhema, in marsh forest on wood. 22°54’ S, 53°45’ W, 240 m. Leg. A. Aptroot (no 79926 24.09.2019, det. A. Aptroot, 2019.