Polyblastia ardesiaca (Bagl. & Carestia) Zschacke

Hedwigia, 55: 292, 1914. Basionym: Thelidium ardesiacum Bagl. & Carestia - Comm. Soc. Critt. Ital., 2: 84, 1864.
Synonyms: Clauzade & Cl. Roux; Polyblastia sprucei (Anzi) Arnold; Polyblastia verrucosa f. hydrophila Asta; Sagedia sprucei Anzi; Thelidium rivale Arnold?; Verrucaria cryptarum var. detersa Garov.
Distribution: N - Frl, Ven, TAA (Nascimbene 2008b), Lomb, Piem (Isocrono & al. 2004, Morisi 2005). C - Marc (Nimis & Tretiach 1999).
Description: Thallus crustose, episubstratic, continuous or rimose, whitish to brownish grey. Perithecia black, globose, 0.4-0.6 mm across, at first immersed in the thallus, then 1/2-3/4 emergent. Involucrellum limited to the apical part of the perithecium, slightly diverging from exciple in the lower part; exciple dark throughout; hamathecium of periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, K/I–, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum. Ascospores submuriform to muriform, with (3-)4-7 transverse septa and (0-)1-4 longitudinal septa, hyaline, ellipsoid, 38-80 x 16-30 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a calcicolous species found on periodically submerged rocks in mountain creeks, usually near or above treeline; most frequent in the Alps.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Periodically submerged (e.g. in creeks)

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

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
Herbarium samples
Index Fungorum GBIF


P.L. Nimis CC BY-SA 04
TSB 24228



Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern



Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern


Source: Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain


G. Gibelli, in S. Garovaglio, 1865 Tentamen Dispositionis Methodicae Lichenum In Longobardia Nascentium. Mediolanum
as Verrucaria cryptarum var. detersa Garov.



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24228)
2001/12/12