ITALIC 8.0

Pertusaria servitiana Erichsen

Feddes Repert., 35: 389, 1934.

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Distribution:

Description: Thallus crustose, episubstratic, white to very pale grey, epruinose, continuous to warted, sorediate, forming large patches. Soralia at first well-delimited, then usually confluent in central parts of thallus. Apothecia immersed in up to 1.5 mm wide, basally constricted thalline warts, with an initially punctiform but soon slightly expanded, black, more or less white-pruinose disc and a distinct thalline margin. Epithecium brown, K-; hymenium colourless; paraphyses slender, branched and anastomosing; hypothecium colourless. Asci 1-2-spored, broadly cylindrical, the apex with a broad ocular chamber, the outer sheath K/I+ blue, otherwise K/I-, Pertusaria-type. Ascospores 1-celled, hyaline, ellipsoid, 110-195 x 34-55 µm, thick-walled. Photobiont chlorococcoid. Spot tests: K+ yellow turning red, with the formation of red needle-like crystals (reaction most evident in the cortex), C-, KC-, P+ bright yellow-orange. Chemistry: norstictic acid.

Note: a rather poorly known epiphytic, sorediate species reported from a few localities in the Balkan Peninsula (Montenegro, Greece) and in Central Europe, characterized by 1-2 spored asci and the presence of norstictic acid. To be looked for in Italy.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

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