ITALIC 8.0

Sarcogyne lobata Cl. Roux & Poumarat

in Roux et al., Bull. Soc. linn. Provence, 74: 122, 2023.

Synonyms:

Distribution:

Description: Thallus crustose, endosubstratic and not evident or very thinly episubstratic and then whitish and more or less distinctly rimose-areolate. Apothecia lecideine, (0.5-)1-4.5 mm across, at first adnate, then sessile and constricted at base, with a flat to finally convex, dark brown to black-brown, but usually bluish-pruinose disc which is often subdivided by cracks into 2-11 parts, and a 0.15-0.3 mm thick, finally more or less deeply lobed, finally sometimes excluded, pruinose or more rarely epruinose proper margin. Proper exciple (150-)230-390 µm thick, dark brown in outer part, colourless within, the outer cells much darker and slightly larger than the apical cells of paraphyses; epithecium brown, 7-10 µm high; hymenium colourless, (85-)120-150(-165) µm high, euamyloid; paraphyses coherent, simple or rarely sparingly branched and anastomosing, 1.5-2.5(-3) µm thick at mid-level, the apical cells 3-6 µm wide; subhyménium colourless, 35-75 µm high, subparaplectenchymatous, the subhymenial medulla 120-195 µm thick, rich in crystals. Asci 150-200-spored, cylindrical-clavate, strongly thickened at apex, the apical dome K/I-, the outer coat K/I+ blue, 60-110 x 16.5-24 µm. Ascospores 1-celled, hyaline, ellipsoid to suboblong, (3-)4-6(-8) x (1.5-)2-3(-3.5) µm, (1.5-)1.8- 3(-4) times as long as wide. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a recently-described calcicolous species hitherto known from several stations in the French Alps, one of which (Mr. Cenis) is not far from the Italian border; see Roux & al. (2023) for further details. To be looked for in the Italian Alps.

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 O. Gonnet - Source: Roux C. & al. 2023. Additions à la 3e édition du Catalogue des lichens de France (3). Changements nomenclaturaux importants et liste commentée des espèces et taxons infraspécifiques nouvellement trouvés en France (du 2022/09/20 au 2023/09/19). Bull. Soc. linn. Provence, 74: 93-124.

Groupe d’apothécies adultes lobées et divisées; thalle endolithique; Maurienne, lac du Mont-Cenis, chapelle Saint-Barthélémy, herb. D. et O. Gonnet (n° 906), photo O. Gonnet