Lecidella umbrosa (A. Massal.) Hertel

Herzogia, 2: 502, 1973. Basionym: Biatora umbrosa Bagl. ex A. Massal. - Symmicta Lich.: 37, 1855.
Synonyms: Lecidea umbrosa (A. Massal.) Jatta
Distribution: N - TAA (Knoph & Leuckert 2000), Lig (Knoph & Leuckert 2000, Lazzarin 2000b).
Description: Thallus crustose, mostly endosubstratic and not evident, rarely consisting of a few, small, thin granules surrounding the apothecia. Apothecia lecideine, black, rounded, sessile, 0.4-0.8 mm across, with a flat to finally slightly convex, epruinose disc, and a thick, glossy, prominent proper margin. Proper exciple dark throughout (dark greenish brown in outer part, dark brown within); epithecium dirty green to brownish green; hymenium colourless; paraphyses easily made free in K, mostly simple; hypothecium colourless to pale yellowish brown. Asci 8-spored, clavate, with an intensely I+ blue tholus penetrated by a weakly amyloid, broadly cylindrical axial mass, and a poorly developed ocular chamber, Lecidella-type. Ascospores 1-celled, hyaline, ellipsoid, 8-11.5 x 6-8 μm. Photobiont chlorococcoid. Spot tests: thallus K+ yellow or K-, C- or C+ orange, KC- or KC+ orange, P-. Chemistry: asemone, plus traces of 4,5,7-trichlor-3-O-methylnorlichexanthone and isoarthothelin, and sometimes variable amounts of thiophanic acid and atranorin.
Note: a poorly known species of base-rich siliceous rocks below the subalpine belt, related with L. anomaloides, which needs further study.
Growth form: Crustose
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: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: very rare
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