Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2002. Lichen Flora of the Greater Sonoran Desert Region. Vol 1.

Life habit: lichenized, lichenicolous Thallus: squamulose squamules: up to 1.5 (-3) mm diam., scattered to adjacent, rounded, weakly to strongly convex upper surface: pale yellow, epruinose or partly covered by farinose pruina, dull, with deep, regular fissures, lacking pores and pseudocyphellae upper cortex: up to 300 µm high, lacking calcium oxalate margin: concolorous with upper surface Apothecia: up to 1 mm diam., plane and marginate when young, later convex and immarginate, faintly pruinose or densely pruinose; exciple: medium brown in the rim, pale brown to colorless in inner part; hypothecium: pale brown to colorless; epithecium: medium brown (K-, N-) asci: clavate, 8-spored ascospores: ellipsoid to bacilliform, 1-septate, 10.5-17.5 x 5-6 µm Pycnidia: laminal, immersed conidia: filiform Spot tests: all negative Secondary metabolites: none detected. Host: cyanolichens. 1950 m Substrate and ecology: on calciferous rock, on boulder in open pinyon-juniper woodland at 1950 m World distribution: scattered in arid areas in the temperate region of the Northern Hemisphere Sonoran distribution: northern Arizona (single locality).