Gyalolechia chanousiae (Sambo) Cl. Roux

Bull. Ass. Fr. Lichénologie, 47, 1: 30, 2022. Basionym: Caloplaca chanousiae Sambo - Ann. Lab. Chanousia, 1: 34, 1932.
Synonyms: Caloplaca chanousiae Sambo; Fulgensia chanousiae (Sambo) Poelt
Distribution: N - TAA, VA (Piervittori & Isocrono 1999).
Description: Thallus crustose-placodioid, episubstratic, closely adhering to the rock, ochraceous yellow to brownish orange, epruinose, forming orbicular to usually irregular, up to 5 cm wide rosettes. Central part of thallus verrucose-areolate; marginal lobes much longer than wide, markedly convex and sometimes almost subcylindrical, straight to usually sinuous, divergent, 0.3-0.8(-1.5) mm wide, to 0.6 mm thick, dichotomously branched. Apothecia 1-1.5(-2) mm across, rounded to irregular in outline, slightly constricted at base, with a flat to slightly convex, orange-brown disc, a thin proper margin, and a thick, smooth to crenulate thalline margin. Epithecium orange-brown, K+ red; hymenium colourless, 80-100 µm high; hypothecium colourless. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 1-septate (very rarely 2-septate), not polarilocular and not constricted at septum, hyaline, fusiform, (15-)17-24(-28) x 3.5-6 µm, straight or slightly curved. Conidia pyriform. Photobiont chlorococcoid. Spot tests: thallus and apothecia K+ red, C-, KC-, P-. Chemistry: thallus and apothecia with unidentified anthraquinones.
Note: on weakly calciferous schists; a poorly known species, a revision of the type material is needed; the distinction from Variospora australis is not clear.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
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
Index Fungorum GBIF

S. Poumarat - Source: http://mycologie.catalogne.free.fr/lichens.htm


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_chanousiae.htm
France, Mont Cenis, Bellecombe - Savoie
16/12/2014


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_chanousiae.htm
France, Mont Cenis, Bellecombe - Savoie
16/12/2014


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_chanousiae.htm
France, Mont Cenis, Bellecombe - Savoie
16/12/2014


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_chanousiae.htm
France, Mont Cenis, Bellecombe - Savoie
16/12/2014