ITALIC 8.0

Verrucaria gudbrandsdalensis Zschacke ex H. Magn.

Bot. Notiser: 417, 1932.

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Distribution:

Description: Thallus crustose, thinly episubstratic, white to pale grey, continuous or slightly rimose. Perithecia black, hemispherically projecting. Involucrellum reaching to base-level, appressed to exciple except near the base; exciple dark, but often paler at base, up to 0.3 mm across; hamathecium of 30-35 μm long 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. Ascospores 1-celled, hyaline, ellipsoid, 19-25 x 9-12 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a rarely reported species of subacid to base rich siliceous rocks, incl. serpentine, in rather humid situations, known from northern Europe and a few localities in the Alps (Austria, Switzerland). For further details see Pykälä & Breuss (2008) and Oïhénart & al. (2018). To be looked for in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

pH of the substrata:

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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

Detail from: https://gzu.jacq.org/GZU000284981

GZU000284981 - Magnusson,A.H. Magnusson, Lichenes selecti Scandinavici exsiccati 144 Date 1928-06-23 Location Norway / Oppland Label Norway. Opland: Gudbrandsdalen, Ringebu, Stulsbroen Habitat On a slaty somewhat soft boulder

Source: Servít M. 1950b. The new lichens of the Pyrenocarpae-group III. Studia Bot. Cechoslov. 11, (1-2): 7-41.