ITALIC 7.0

Thelidium pluvium Orange

Lichenologist, 23: 101, 1991.

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, continuous to faintly rimose, pale grey-green to brown, up to 85 μm thick. Perithecia black, forming 0.25-0.5 mm wide, conical-hemispherical projections which are covered, except at apex, by a thalline layer, with an inconspicuous, not depressed ostiole. Involucrellum dark brown, rather thin and poorly developed, covering the upper half of exciple and scarcely spreading, or spreading sideways and downwards to almost the base-level; exciple 0.2–0.35 mm across, brown at apex, colourless below; 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, (19.5-)24-30(-37) x (7-)10.5-4(-18) μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: this species grows in the splash zone of small rivers and creeks on siliceous rocks and pebbles, usually in shaded situations, below the subalpine belt; it was reported from the Eastern Alps (Austria); to be looked for in the Italian Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Periodically submerged (e.g. in creeks)

Pioneer species

pH of the substrata:

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5

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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

Index Fungorum GBIF

Source: http://fungi.myspecies.info/file/15810 - CC BY-NC

Source: http://fungi.myspecies.info/file/15810 - CC BY-NC