ITALIC 8.0

Caloplaca concinerascens (Nyl.) H. Olivier

Mém. Soc. natn. Sci. nat. Cherbourg, 37: 139, 1909. Basionym: Lecanora concinerascens Nyl. - Flora, 68, 3: 40, 1885.

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Distribution:

Description: Thallus crustose, episubstratic, rimose-areolate, at first ash-grey but soon turning dark brown to brown-black. Apothecia lecanorine, 0.1-0.5 mm across, with a flat to slightly convex, dark brown to black disc, a thin, concolour proper margin and an initially thick, finally often excluded thalline margin. Epithecium grey-brown, K+ faintly violet; hymenium colourless, without oil droplets and without crystals; paraphyses mostly simple o few sparingly branched in upper part, 1.5-2 µm thick at mid-level, the apical cells 3.5-5 µm wide. 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 2-celled, polarilocular, hyaline, ellipsoid, 8-13 x 4-8 µm, the septum (3-)4-5.5 long, c. 1/3 of spore length. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: unknown, but probably thallus without lichen substances.

Note: a mainly calcicolous species, known from the French Alps (at low altitudes) and the eastern Pyrenees. To be looked for in Italy. The species does not belong to Caloplaca s.str. but the precise generic attribution is still pending.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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

Courtesy Olivier Gonnet

France, Olivier Gonnet 18/11/2015 - sur serpentine - St-Préjet-Armandon - alt. 660 m - Haute-Loire

CC BY-NC 4.0 - Source: https://lichenportal.org/portal/taxa/index.php?taxon=138035 - Wisconsin State Herbarium, Lichens (WIS)

Catalog Nr: WIS-L-0124297 - Leg.: K. Kalb & Cl. Roux Nr: 3105 - 12.8.1975 - France, Provence-Alpes-Côte d'Azur, Dept. Vaucluse: Gordes - Les Revens, 320 m, Molasse calcaire

CC BY-NC 4.0 - Source: https://lichenportal.org/portal/taxa/index.php?taxon=138035 - Wisconsin State Herbarium, Lichens (WIS)

Catalog Nr: WIS-L-0124297 - Leg.: K. Kalb & Cl. Roux Nr: 3105 - 12.8.1975 - France, Provence-Alpes-Côte d'Azur, Dept. Vaucluse: Gordes - Les Revens, 320 m, Molasse calcaire

Courtesy Olivier Gonnet

France, Olivier Gonnet 18/11/2015 - sur serpentine - St-Préjet-Armandon - alt. 660 m - Haute-Loire