Polyblastia abscondita (Nyl.) Arnold

Flora, 46: 141, 1863. Basionym: Verrucaria abscondita Nyl. in Stitzenberger - Jahresber. St. Gallisch. naturw. Gesellsch.: 486, 1882.
Synonyms:
Distribution: N - TAA (Dalla Torre & Sarnthein 1902).
Description: Thallus crustose, endosubstratic or very thinly episubstratic, continuous, pale brown. Perithecia black, globose, 0.2-0.3 mm across, completely immersed and leaving pits in the rock. Involucrellum absent; 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 (6-)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 4-8 transverse septa and up to 4 longitudinal septa, hyaline (sometimes yellowish brown when old), ellipsoid, 30-45 x (16-)18-22 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on calcareous rocks in rather sheltered situations near and above treeline. According to Savić & al. (2008), the species belongs to the Thelidium-clade, not to Polyblastia s.str.
Growth form: Crustose endolithic
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very 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
Index Fungorum GBIF

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1270&lang=en
Belgium, Ardennes belges
sur calcaires durs


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