Thelidium ungeri Körb.

Flot. ex Körb., Syst. Lich. Germ.: 354, 1855.
Synonyms: Clauzade & Cl. Roux; Leiophloea ungeri (Körb.) Trevis.; Sagedia ungeri (Körb.) Anzi; Thelidium pyrenophorum f. intermedium Asta; Verrucaria ungeri var. decussata Garov.
Distribution: N - Ven (Ravera & al. 2021), TAA (Nascimbene & al. 2022), Lomb, Piem (TSB 32944), Emil (Fariselli & al. 2020).
Description: Thallus crustose, episubstratic, thick, dirty white, granular to verrucose. Perithecia black, 0.3-0.8 mm across, half immersed in the thallus. Involucrellum well-developed, covering the upper third of the perithecium; exciple dark in upper part, colourless or pale brown in lower part; hamathecium of periphyses and periphysoids, interascal filaments absent; hymenial gel I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, ellipsoid to clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of a delicate rostrum. Ascospores 1-septate, hyaline, ellipsoid, 19-32 x 9-14 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on inclined surfaces of calciferous rocks in upland areas. Closely related to T. pyrenophorum, from which it differs in the thick, verrucose thallus, this species seems to be widespread in the Alps.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: rather rare
Oromediterranean belt: absent
Montane belt: very 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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(info)

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 34653



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34653)
2002/01/30
f. intermedium Asta, Clauzade & cl Roux, with a well-developed, areolate thallus


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Thelidium_ungeri.htm
France, 23/8/2016 - Mijoux, alt. 1500 m - Ain


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Thelidium_ungeri.htm
France, 23/8/2016 - Mijoux, alt. 1500 m - Ain


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Thelidium_ungeri.htm
France, 23/8/2016 - Mijoux, alt. 1500 m - Ain


Source: Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain


G. Gibelli, in S. Garovaglio, 1865 Tentamen Dispositionis Methodicae Lichenum In Longobardia Nascentium. Mediolanum