Farnoldia jurana subsp. bicincta (Hertel) Hafellner & Türk

Clauzade & Cl. Roux ex Hafellner & Türk, Stapfia 76: 152, 2001. Basionym: Lecidea jurana var. bicincta Hertel - Beih. Nova Hedwigia, 24: 89, 1967.
Synonyms: Melanolecia jurana subsp. bicincta (Hertel) Clauzade & Cl. Roux; Melanolecia jurana var. bicincta (Hertel) Hertel
Distribution: N - Frl (TSB 35606), Ven (Nimis 1994), TAA (Nascimbene 2005), Piem (TSB 34783).
Description: Thallus crustose, mostly endosubstratic, rarely very thinly episubstratic, usually continuous, rarely finely areolate, mostly pale blue-green, sometimes white to yellowish-ochre (mainly in the epilithic forms). Medulla white, I- (rarely I+ pale blue). Apothecia lecideine, adnate and constricted at base, black, epruinose and somehow shiny or finely bluish-pruinose, 0.2-1.5(-2.5) mm across, with a distincly umbonate disc and a thick, prominent, doubled proper margin, resembling those of Umbilicaria crustulosa. Proper exciple black, the hyphae 5-9 µm thick, K- or K+ reddish brown; epithecium blue-green or greenish brown (the two colours often present in the same apothecium); hymenium colourless or greenish in upper part, 70-130 µm high; paraphyses coherent, branched and anastomosing, 1.7-2.2 µm thick at mid-level, the apical cell to 3 µm wide; hypothecium green- to brown-black, the upper part more intensive green, K- or K+reddish brown, c. as high as the hymenium. Asci 8-spored, clavate, with a I+ pale blue tholus and a central amyloid tube, approaching the Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 11-28(-30) x 6-13(-18) µm, halonate, the perispore to 3 µm thick. Pycnidia black, immersed, globose. Conidia bacilliform, 3.5-9 µm long. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on exposed calcareous rocks near and above treeline, often associated with Hymenelia coerulea; probably more widespread in the Alps.
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: rather rare
Subalpine belt: 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


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34783)
2002/02/01


LITERATURE