Staurothele bacilligera (Arnold) Arnold

Flecht. Frank. Jura: 256, 1885. Basionym: Polyblastia bacilligera Arnold - Flora, 52: 516, 1869.
Synonyms:
Distribution: N - Ven, TAA (Nascimbene 2005).
Description: Thallus crustose, endosubstratic or thinly episubstratic and forming minute brown specks, pale grey-brown to pale blue-grey. Perithecia black, 0.2-0.4 mm across, without involucrellum, immersed in pits in the rock, rarely slightly projecting when old. Exciple brown; hymenium I+ reddish; hymenial algae oblong to narrowly oblong, 2-4 times as long as wide, 4-7 x 12 μm; hamathecium of periphyses and periphysoids, interascal filaments absent. Asci 8-spored, clavate, the wall thickened above, with an ocular chamber, after dehiscence with a delicate extruded endotunica, I-, K/I-. Ascospores muriform, usually hyaline, sometimes finally pale yellowish brown, ellipsoid, (20-)30-37(-40) x 12-17(-20) μm. Photobiont chlorococcoid (Stichococcus), present in both thallus and hymenium. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on calcareous rocks near or above treeline; a taxon which needs further study.
Growth form: Crustose endolithic
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

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
Herbarium samples

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