ITALIC 7.0

Vezdaea retigera Poelt & Döbbeler

Lichenologist, 9): 170, 1977

Synonyms:

Distribution:

Description: Thallus crustose to subleprose, episubstratic, grey-green when dry, dark green when wet, entirely consisting of goniocysts with up to 2 μm long, spiny outgrowths. Apothecia short-lived, without a proper margin, rather small, 0.3(-0.6) mm across, white to pale flesh-coloured, brownish when old, hemispherical to semi-globose, with a rough surface when moist. Proper exciple absent; hymenium lacking gelatine, consisting of abundant, branched and anastomosing, 0.7-1.5 μm thick paraphyses forming loose envelopes around the asci. Asci 8-spored, cylindrical, thick-walled, with a thick I+ blue apex (except for an apical pore). Ascospores 1-celled, hyaline, ellipsoid, (14-)15-22(-24) x 7-11(-13) μm, with a smooth wall. Photobiont chlorococcoid (Leptosira). Spot tests: all negative. Chemistry: without lichen substances.

Note: a widespread, but poorly collected species known from Europe and North America, with several records from the Alps, growing in damp situations on base-rich soil, lichens and moribund bryophytes, more rarely on decaying wood, tolerant to substrates with heavy metals. To be looked for in Italy.

Growth form: Crustose

Substrata: lignum, rocks, soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Species of metal-rich rocks

Pioneer species

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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 04

TSB 20937

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (20937)
2001/12/03