Koerberiella wimmeriana (Körb.) Stein

in Cohn, Krypt.-Fl. von Schlesien, 2, 2: 143, 1879. Basionym: Zeora wimmeriana Körb. - Denkschr. schles. Ges. vaterl. Kultur: 232, tab. 4, fig. 3, 1853.
Synonyms: Aspicilia acceptanda (Nyl.) Arnold ex Hue; Aspicilia leucophyma (Leight.) Hue; Aspicilia littoralis (Vain.) Hue; Lecanora acceptanda Nyl.; Lecanora creatina Norman ex Th. Fr.; Lecanora leucophyma Leight.; Lecanora littoralis (Vain.) Zahlbr.; Lecanora wimmeriana (Körb.) Poetsch; Lecanorella josiae Frey; Lecidea creatina (Th. Fr.) Stizenb.; Perspicinora leucophyma (Leight.) Riedl; Pertusaria littoralis Vain.
Distribution: N - TAA (Nascimbene & al. 2007b, Nascimbene & al. 2022), Lomb, Piem (Favero-Longo & al. 2015).
Description: Thallus crustose, episubstratic, rimose to areolate, often delimited by a dark prothallus, with numerous, whitish grey to pinkish grey, isidia-like, cylindrical to subclavate, 0.5-1.2 mm tall papillae bearing a pycnidium on the top. Cortex paraplectenchymatous, brownish in uppermost part, without a distinct epinecral layer; medulla poorly developed, I-. Apothecia lecanorine, sessile, sometimes slightly constricted at base, 0.5-1(-1.2) mm across, with a pale brown to dark red-brown, flat to slightly convex disc and a thick, smooth thalline margin. Thalline exciple corticate, paraplectenchymatous, brownish in outer part; proper exciple poorly developed; epithecium brownish, with coarse granules dissolving in N; hymenium colourless, 125-180 µm high, K+ orange-brown; paraphyses coherent, slender, sparingly branched and anastomosing, with subglobose terminal cells; hypothecium colourless or pale brown in lower part. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 19-30(-35) x 8-13(-17) µm, when young often with a gelatinous sheath, the wall thin, I-. Pycnidia black, immersed at the top of the papillae. Conidia bacilliform, (3.5-)4.5-5 x 1-1.5 µm, often with a short attachment peg at one end. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: traces of gyrophoric acid and 5-0-acethyl-4-methylhyascic acid, and of an unidentified substance.
Note: an arctic-alpine, circumpolar species found on periodically wetted, base rich siliceous rocks, with optimum near and above treeline; being often sterile, it might have been largely overlooked in the Alps.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)
Periodically submerged (e.g. in creeks)

Commonnes-rarity: (info)

Alpine belt: very rare
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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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


Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley, Dawson Falls Date: 2012-04-03 On river boulders in waterfall sprayzone


Pier Luigi Nimis CC BY-SA 4.0
Herbarium: TSB 9221



Juri Nascimbene - CC BY-SA 4.0
Mt. Adamello (Alps), Italy
2006



P.L. Nimis CC BY-SA 04
TSB 9221



P.L. Nimis CC BY-SA 04
TSB 35252


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_JK/Texte_JK/Koerberiella_wimmeriana.htm
France, Entre les lacs du Mont-Cenis et Roterel, alt. 1930 m sur schiste non calcaire - dét. Michel Bertrand - Savoie
24/8/2018