ITALIC 8.0

Verrucaria truncigena Breuss

Linzer biol. Beitr., 30, 2: 832, 1998.

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Distribution:

Description: Thallus crustose, thinly episubstratic, up to 60 µm thick, grey-brown to dark brown, more or less continuous and smooth, without a distinct hypothallus. Perithecia black, immersed at base and hemispherically projecting, ovoid to globose, up to 0.23 mm across. Involucrellum completely surrounding the exciple; exciple brownish throughout; hamathecium of periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. 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, 50-70 x 18-25 µm. Ascospores 1-celled, hyaline, ellipsoid to slightly ovoid, 20-22 x 9-10 µm, filled with numerous oil droplets. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

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

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

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