ITALIC 8.0

Dermatocarpon miniatum var. cirsodes (Ach.) Zahlbr.

Cat. Lich. Univ., 1: 225, 1921 (1922). Basionym: Endocarpon miniatum var. cirsodes Ach. - Lich. Univ.: 303, 1810

Synonyms: Dermatocarpon caesium Räsänen

Distribution:

Description: Thallus foliose-umbilicate, heteromerous, dorsiventral, attached by a central holdfast, monophyllous, 0.42-1.78 mm thick when dry, 0.43-0.72 mm thick when wet, the lobes 13-42 mm wide, with usually down-rolled margins. Upper surface grey-pruinose, slightly to distinctly areolate. Lower surface pale brown, with distinct, stout, dark warts, erhizinate. Upper cortex 90-260 µm thick, of anticlinally arranged hyphae, brownish in the uppermost 10-30 µm, with an epinecral layer of air filled hyphae; lower cortex 40-90 µm thick, consisting of ca. 8, vertically oriented cell layers; medulla white to patchily pigmented, 90-500 µm thick, I-. Perithecia numerous, immersed in the thallus and scattered over almost the whole upper surface (appearing as black dots), without involucrellum. Exciple colourless except in the brown uppermost part; hamathecium of periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type. Ascospores 1-celled, hyaline, ellipsoid, 8.5-14 x 4.5-6 µm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a morph with thick thalli and a distinctly papillose lower surface, found on calcareous or basic siliceous rocks, usually in long-time dry localities, with several records in the Alps (France, Austria). According to Heiðmarsson (2017) it should be considered as a synonym of D. miniatum. To be looked for in Italy.

Growth form: Foliose, umbilicate

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

Index Fungorum GBIF

Pier Luigi Nimis - CC BY-SA 4.0

TSB 14334

Pier Luigi Nimis - CC BY-SA 4.0

TSB 14334

Pier Luigi Nimis - CC BY-SA 4.0

TSB 14334

Pier Luigi Nimis - CC BY-SA 4.0

TSB 14334