ITALIC 8.0

Thelidium tongletii (Hue) Zahlbr.

Cat. Lich. Univ., 1: 133, 1922. Basionym: Verrucaria tongletii Hue - Bull. Soc. bot. Fr., 44: 430, 1897

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, ash-grey to grey-white, with an oily appearance, forming a thick, continuous, uneven-verrucose crust. Perithecia brownish to black, 0.3-0.5 mm across, entirely immersed in the thalline warts, with a flattened apical part. Involucrellum thick, limited to the upper third of the perithecium; exciple globose, black throughout or pale in lower part; hamathecium of periphyses, interascal filaments absent; hymenial gel hemiamyloid, 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(-2)-septate, hyaline, ellipsoid, 20-26(-28) x 14-17 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a rare, poorly known calcicolous species reported from the French Pyrenees and Switzerland. To be looked for in the Italian Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

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