ITALIC 8.0

Sarcogyne cretacea Poelt

Mitt. bot. Staatss., München, 5: 251, 1964

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Distribution:

Description: Thallus crustose, episubstratic, 1-2(-5) mm thick, chalky white, continuous to finely rimose but never areolate, forming well delimited, small, 2-8 mm wide but often confluent, orbicular patches, without a distinct prothallus. Cortex not developed, the thallus structure being masked by dense crystals. Apothecia lecideine, 0.5-0.8 mm across, immersed in the thallus and finally separated from it by a thin crack, with a dark brown to black (brown-red when moist), usually epruinose, concave disc, and a wavy, thin, raised, sometimes bluish-pruinose, usually persistent proper margin. Proper exciple 100-150 μm thick, of radiating hyphae with swollen and dark brown tips, the rim dark brown, the inner part pale brown to colourless; epithecium brown, 10-15 μm high; hymenium colourless, 100-120 µm high, the hymenial gel euamyloid, IKI+ persistently dark blue; paraphyses coherent, simple to sparingly branched, regularly septate, 1.7-2 μm thick, the apical cells not capitate or only slightly wider; hypothecium colourless, inspersed with oil droplets, subtended by an algal layer. Asci 100-200-spored, cylindrical-clavate, strongly thickened at apex, the apical dome K/I-, the outer coat K/I+ blue. Ascospores 1-celled, hyaline, broadly ellipsoid, 4-5.5 x 2-3 µm. Pycnidia black, globose, immersed. Conidia 2-2.5 x c 1 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on exposed cliffs of marly limestone and calcareous schists above treeline; so far only known from some scattered localities in the Alps, outside Italian territory. To be looked for in the Italian Alps

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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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

University of Wisconsin - Madison (WIS) Catalog #: WIS-L-0138317 Determiner: Josef Hafellner (1982) Collector: Josef Hafellner Number: 10000 Date: 1982-07-09 Locality: Austria, Tyrol, Lechtaler Alpen, Ostgrat of Parseler Peak, NW from Landeck 47.25 10.5 +-10592m. WGS84 Elevation: 2900-2900 m Substrate: on Mergel limestone - CC BY-NC 3.0 - Source: Consortium of Lichen Herbaria (2023) http//:lichenportal.org/portal/index.php. Accessed on December 20.