ITALIC 8.0

Verrucaria austriaca Riedl

Linzer biol. Beitr., 22, 1: 154, 1990.

Synonyms: Verrucaria irrigua Zschacke non Taylor

Distribution:

Description: Thallus crustose, hemiendosubstratic, pale grey, weakly rimose to subareolate. Perithecia black, mostly immersed, 0.2-0.25 mm across. Involucrellum absent; exciple black-brown in upper part, colourless in lower part; 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, subcylindrical to oblong-clavate, I-, fissitunicate, the wall thickened above, 70-75 x 16-18 µm, Verrucaria-type. Ascospores 1-celled, hyaline, ellipsoid, 16-18 x 7.5-8 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a calcicolous freshwater species, only known from the type collection in the Eastern Alps (Austria, Sonntagsberge bei Rosenau). For the main diffrerences with similar species see Thüs & Schultz (2009). To be loooked fron in the Italian Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Periodically submerged (e.g. in creeks)

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

Source: https://www.europeana.eu/en/item/11601/HERBARWXNHMVXAUSTRIAX540119

Verrucaria austriaca Riedl - Natural History Museum, Vienna, Austria - CC BY-SA. Strasser,P. (collector) H. Thüs 2008 (identifier)

Source: https://www.europeana.eu/en/item/11601/HERBARWXNHMVXAUSTRIAX540119

Verrucaria austriaca Riedl - Natural History Museum, Vienna, Austria - CC BY-SA. Strasser,P. (collector) H. Thüs 2008 (identifier)