ITALIC 8.0

Protoblastenia laeta (Poelt) Kainz & Rambold

Bibl. Lichenol., 88: 292, 2004.. Basionym: Protoblastenia calva var. laeta Poelt - Mitt. bot. Staats. Muenchen, 17-18: 390, 1957.

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Distribution:

Description: Thallus crustose, episubstratic, 0.1-0.5 mm thick, rimose to areolate, whitish, grey or pale brown. Areoles angular, concave to flat, up to 0.5 mm wide. Apothecia yellow-orange to bright orange, 0.45-1(-1.7) mm across, semi-immersed to sessile, not or only slightly constricted at base, weakly to strongly convex and immarginate. Proper exciple thin, of parallel-radiating hyphae, colourless to yellowish, patchily pigmented; epithecium orange-brown, 10-15 µm high, with granular crystals reacting K+ red; hymenium colourless to pale orange, 100-150 µm high, hemiamyloid; paraphyses coherent, sparingly branched and anastomosing, 2-3.5 µm thick, the apical cells slightly swollen, 2.5-4.5 µm wide; hypothecium orange to pale yellow, patchily pigmented. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a tube, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid to ovoid, 11-13(-14) x 6-7.5 µm, without a distinct perispore. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ red. Chemistry: apothecia with anthraquinones, mainly parietin.

Note: on shaded calcareous rocks, usually on steep, north-exposed rock faces; widespread in Europe but rare, with a few records from the Eastern Alps (Austria, Germany); 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