Staurothele alpina Zschacke

Rabenhorst’s. Krypt.-Fl., 2nd ed. (Leipzig), 9, 1: 530, 1934.
Synonyms:
Distribution:
Description: Thallus crustose, episubstratic, rather thick, rimose-areolate in central parts, more or less continuous or rimose in peripheral parts, dark brown to blackish brown, forming orbicular patches 0.3-1.5 cm in diam, surrounded by a distinct, pale grey-brown prothallus. Perithecia black, without involucrellum, 0.4-0.6 mm across, completely immersed in the thallus warts, with a brown to black apex. Exciple pale throughout except near the ostiole; hymenial gel I+ red (I+ blue at very low concentrations of iodine), K/I+ blue; hymenial algae narrowly oblong, most often 2-celled, 6-7 μm long; paraphyses absent, substituted by periphyses and periphysoids. Asci 2-spored, clavate, the wall thickened above, with an ocular chamber, after dehiscence with a delicate extruded endotunica, I -, K/I-. Ascospores muriform, oblong-ellipsoid to ellipsoid, pale to mid-brown, 42-54 x 16-25 μm. Photobiont chlorococcoid, present in both thallus and hymenium. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a very poorly known species of the S. clopima-group; on dolomite in the high alpine belt, only recorded from the Swiss Alps; to be looked for in Italy.
Growth form: Crustose
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: extremely 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