Lecanora subaurea Zahlbr.

Cat. Lich. Univ., 5: 547, 1928.
Synonyms: Lecanora aurea Eitner; Lecanora hercynica Poelt & Ullrich
Distribution: N - Frl (Tretiach & Hafellner 2000), Lomb (Nascimbene 2006), Piem (TSB 33829).
Description: Thallus crustose, episubstratic, areolate-subsquamulose, yellowish grey to sulphur yellow, forming continuous crusts or more rarely consisting of dispersed, flat to slightly convex, crenulate, 0.5-1.5(-3) mm wide areoles with marginal, bright sulphur-yellow, finely granular, 30-70 μm thick soredia which rarely coalesce into a sorediate crust. Apothecia rare, lecanorine, 0.2-0.8 mm across, sessile, more or less immersed amongst the soredia, with a concave to flat, red-brown to olivaceous brown, epruinose disc, and a well-developed, persistent, often sorediate thalline margin. Epithecium red-brown to olive-green, with a few granules; hymenium colourless, 45-60 μm high; paraphyses mostly simple, slightly thickened at apices; hypothecium colourless, inspersed with oil droplets. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, 7-10 x 6-8 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P+ orange-red, UV+ bright orange. Chemistry: rhizocarpic acid, pannarin, zeorin.
Note: on iron-rich rocks, including pebbles. A dubious record from M. Etna (see Nimis 1993: 370) is not accepted here.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
Species of metal-rich rocks

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: extremely rare
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 CC BY-SA 04
TSB 35219



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (3248)
2001/11/25



P.L. Nimis CC BY-SA 04
TSB 3248


LITERATURE