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 Thallus: foliose, single-lobed attached by a single umbilicus and with 17-32 wide lobes; upper surface: gray, with epinecral layer consisting of air filled hyphae; upper cortex: 70-100 µm thick, hyaline with outermost part, c. 10 µm, brownish; algal layer: 50-120 µm thick; medulla: 110-220 µm thick, of filmentous hyphae turning red with Melzer's iodine; lower cortex: 50-70 µm thick, with the outermost 10-20 µm brown; lower surface: light to dark brown with rhizinomorphs; rhizinomorphs: consisting of cortex, 30-70 µm thick; Perithecia: broadly obpyriform to globose, with hyaline exciple that is light brown to brown in the uppermost part; asci: clavate or cylindrical, 8-spored; ascospores: simple, hyaline, 10-13 x 5-8 µm; Pycnidia: not found; Spot test: all negative; Secondary metabolites: none detected.; Substrate and ecology: rocks, often growing on mossy rocks in shade; World distribution: Eurasia, North America; Sonoran distribution: Arizona, Sonora, and Chihuahua.; Notes: Dermatocarpon moulinsii is characterized by the rhizinomorphs, which only consist of the lower cortex while the rhizinomorphs of D. schaecthelinii are thicker and have a medullary layer. Dermatocarpon moulinsii furthermore has thinner thallus and generally shorter spores than D. schaechtelinii. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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