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Description

 Life habit: lichenized; Thallus: crustose, often filmy, smooth or rarely +verrucose, effuse, sometimes isidiate, often with hyphophores; hyphophores: sometimes present, erect, spine-like, top-shaped or scaly; photobiont: primary one a green trebouxioid alga, secondary one absent; Ascomata: apothecial, red-brown to black, often with a raised rim, immersed, semi-immersed or sessile, becoming translucent when wet, lacking a thalline margin; proper exciple and hymenium: composed of a loosely anastomosing network of thin hyphae (paraphysoids) in a gelatinous matrix; asci: cylindrical-clavate to ovate, thickened at the apices, internally I+ dark red, 2-8-spored; ascospores: hyaline, transversely septate to muriform, with a thin to thick perispore; Conidiomata: pycnidia not observed but hyphophores may serve a similar function; Secondary metabolites: none detected by TLC; Geography: western Europe, tropical South America and North America; Substrate: on rocks, trees, mosses or soil in humid microhabitats and as epiphylls in the tropics.; Note: Gyalideopsis is a very rarely collected genus. Superficially it is similar to Gyalidea, but that genus is very different anatomically, as it has true paraphyses. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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