ITALIC 8.0

Porpidia flavocruenta Fryday & Buschbom

in Fryday, Lichenologist, 37: 9, 2005

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, 0.1-0.2 mm thick, yellow-orange to yellow-brown, continuous to often irregularly cracked-areolate, with low warts from which the apothecia arise, usually delimited by a black prothallus. Medulla I-. Apothecia lecideine, (0.8-)1.2-1.5(-2.5) mm across, black, sessile and slightly constricted at base, with a flat to slightly convex, rarely umbonate, often weakly grey- or orange-pruinose disc, and a raised, persistent, c. 0.1 mm thick proper margin. Proper exciple of radiating hyphae, the outer rim blue-black, 17-25 μm wide, of globose, 6-12 μm wide cells, K+ red, N+ red, the inner part orange-brown, of 3-4(-5) μm wide cells, K+ red or rarely K-, N-; epithecium pale olivaceous, K-, N+ red, sometimes blue-green in lower part; hymenium colourless, 135-150 μm high, I+ blue; paraphyses coherent, branched and anastomosing, 1-1.5 μm thick, with scarcely swollen apices; subhymenium colourless, c. 50 μm high; hypothecium dark brown, c. 100 μm high, K–, N-. 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, (13-)15-19 x 8-10 μm, rather thin-walled, with a narrow perispore. Pycnidia black, innate to sessile, often surrounded by a thalline layer. Conidia simple, cylindrical, 10-14 x c. 0.8 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances.

Note: on siliceous boulders and low outcrops; widespread in Europe and also known from Alaska, with a few records from the Eastern Alps (Austria), mostly near treeline. 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

Index Fungorum GBIF

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php