ITALIC 8.0

Verrucaria tuerkii Breuss

Linzer biol. Beitr., 25, 2: 657, 1993

Synonyms:

Distribution:

Description: Thallus crustose, very thinly episubstratic, pale grey-green, without a prothallus. Perithecia black, c. 0.2 mm wide, at first covered by a thalline layer, then with a naked apical part. Involucrellum hemispherical, closely adhering to exciple, extending down to exciple-base level and there slightly diverging; exciple globose, thin, black throughout (but paler below in young perithecia); hamathecium of 20-25 µm long and up to 3 µm thick periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type. Ascospores 1-celled, hyaline, narrowly ellipsoid, 24-29 x 8-10 µm, biseriately arranged in the asci. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on bark Fagus in a humid mixed forest, so far only known from type locality in the Eastern Alps (Austria). To be looked for in the Italian Alps.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

pH of the substrata:

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5

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Solar irradiation:

1

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5

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Aridity:

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4

5

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Eutrophication:

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Poleotolerance:

0

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Altitudinal distribution:

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Predictive model

O. Breuss - Source: Linzer biol. Beitr., 25, 2: 657, 1993

O. Breuss - Source: Linzer biol. Beitr., 25, 2: 657, 1993