ITALIC 8.0

Micarea flavoleprosa Launis, Malíček & Sérus.

in Launis & al., Mycologia, 111, 4: 582, 2019.

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Distribution:

Description: Thallus crustose, episubstratic, thick, bright yellowish green when fresh (dark olive green in thin parts and paler yellowish to whitish green in thicker parts), whitish green to olive green in herbarium specimens, granular or farinose, composed of 12-20 μm wide goniocysts which often coalesce into up to 65 μm wide, soredioid granules. Apothecia very rare, micareoid, emarginate, 0.4-0.6 mm across, cream white, adnate to hemispherical. Proper exciple inconspicuous and poorly evident; epithecium colourless, K-, C-; hymenium colourless, 40-55 μm high; paraphyses numerous, branched and anastomosing, 0.5-1.5 μm thick; hypothecium colourless. Asci 8-spored, clavate, in K/I with a blue outer layer and apical dome and unstained wall, the dome with an apical cushion. Ascospores simple or 1(-2)-septate, hyaline, oblong-ellipsoid or obovoid, (10-)12-16 x 4-6 μm. Pycnidia whitish, of two types: a) 50-90 μm wide mesopycnidia, usually immersed, barrel-shaped or globose, sometimes with an extruding, white conidial mass, producing cylindrical or cylindrical-fusiform mesoconidia measuring 4-5.5 x 1.2-1.5 μm; b) 40-100 μm wide globose micropycnidia, immersed to sessile with a gaping ostiole, producing straight or sometimes curved, bacilliform or narrowly fusiform microconidia measuring 5.5-9 x c. 1 μm. Photobiont micareoid, the cells 4.5-7 μm wide. Spot tests: thallus and apothecia K-, C-, KC-, P-, UV-. Chemistry: micareic acid, with traces of other related compounds.

Note: a recently-described species growing on the decaying wood of stumps in more or less undisturbed forests, known from a few localities in Central Europe (Launis & al. 2019); to be looked for in the Italian Alps.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

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