Gyalidea lecideopsis (A. Massal.) Vězda var. lecideopsis

Lettau ex Vezda, Folia Geobot. Phytotaxon., 1: 312, 1966. Basionym: Gyalecta lecideopsis A. Massal. - Miscell. Lichenol.: 39, 1856.
Synonyms: Gyalecta hyalina Hepp; Gyalecta stigmatoides (Nyl.) Boistel; Gyalidea albocrenata (Arnold) Lettau; Lecidea stigmatoides Nyl.
Distribution: N - Ven (Lazzarin 2000b), TAA, Piem (Isocrono & al. 2004).
Description: Thallus crustose, endosubstratic or thinly episubstratic, often inconspicuous and poorly evident, smooth or finely granulose, grey-white to yellowish grey. Apothecia 0.2-0,6 mm across, with a concave, dark reddish brown, dark brown to black disc and a smooth, crenulate or radially split, mostly black to brown proper margin (often turning pure white in dry sites). Proper exciple 50-60 µm wide laterally, dark olive-brown in outer part, colourless or paler within; epithecium dark brown to brown-black; hymenium colourless or pale yellowish brown, 100-130 µm high; paraphyses mostly simple, to 1 µm thick, not swollen at apex; hypothecium colourless or pale yellowish brown. Asci 6-8-spored, thin-walled, apically thickened, with a small ocular chamber. Ascospores muriform, hyaline, ovoid to broadly ellipsoid, (17-)22-30(-35) x (10-)12-15 µm, without a distinct perispore. Photobiont chlorococcoid, Cystococcus/Leptosira-like. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a northern-montane species found on limestone, dolomite, calciferous schists, on porous, damp faces; easily overlooked, but certainly rare.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: extremely rare
Oromediterranean belt: absent
Montane belt: extremely rare
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


P.L. Nimis CC BY-SA 4.0
TSB 14644



Pier Luigi Nimis - CC BY-SA 4.0
Herbarium: TSB (14644)