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 Thallus: superficial and to nearly 100 µm thick; surface: yellow-brown to dull brown, often glossy, scabrid in sheltered sites, subgelatinous; photobiont: a cyanobacterium, Hyella; cells: orange, small, up to 12 um in diam.; Perithecia: 0.2-0.25 (-0.3) mm diam., sessile on siliceous rocks, flattened, with a black ring around the ostiole (resembling life savers, especially when wet) and a pale base, globose and immersed on calcareous substrate 12-20 (-27) x 5-8 (-10) µm; involucrellum: sometimes distinct; asci: ovoid to subcylindrical, c. 8-spored; ascospores: narrowly ovoid, hyaline, 1-septate, cells unequal in size,; Pycnidia: 60-80 µm diam; conidia: bacilliform to ellipsoid, 2.5-3.5 x 0.5-1 um; Spot tests: all negative; Secondary metabolites: none detected.; Substrate and ecology: on siliceous rocks, also superficial on limestone and shells (barnacles, limpets, etc.) in the littoral zone; World distribution: widespread in Northern Hemisphere; Sonoran distribution: coastal California [reported from central part, but likely to also occur in southern part].; Notes: This widespread, morphologically variable taxon needs further study and may include several species. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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