IUCN threat status:

Not evaluated

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Description

 Life habit: lichenized; Thallus: crustose, thin, mostly immersed in substrate; upper surface: whitish or pale; cortex: lacking; photobiont: primary one a trentepohlioid alga, secondary photobiont absent; Ascomata: perithecial, almost entirely immersed to sessile, black (rarely pink or whitish), compound,; involucrellum: brown-black, hemispherical to globose, surrounding exciple; ascomatal wall: black, continuous below the hamathecium; exciple: ± globose, colorless or pale brownish; hamathecium: branched pseudoparaphyses, anastomosing above the asci, non-amyloid; asci: bitunicate, cylindrical, K/I-; apical dome: with a broad ocular chamber surmounted by a hemispherical, meniscus-like structure, non-amyloid, (4-) 8-spored; ascospores: uniseriate, hyaline, ellipsoid, 1(-3)-septate with a median euseptum, 11-60 x 5.5-23 µm; walls: ornamented with tiny warts; Conidiomata: pycnidial; conidia: formed acrogenously, ellipsoid to narrowly ellipsoid, simple, hyaline; Secondary metabolites: none detected; Geography: mostly temperate on both hemispheres; Substrate: mostly on bark, but also on calcareous rock.; Notes: It is characterized by its cylindrical asci with an unusual ascal tip structure and ellipsoid, 1-septate ascospores with a warted epispore. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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