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

Thallus: crustose, quite thin, chinky-areolate areoles: minute, angular, flat, confluent surface: bluish-ashy hypothallus: lacking Perithecia: single in areoles, tiny, up to 0.2 mm wide, apex flat, pruinose; exciple: black, entire; hymenium: I+ blue, turning red asci: saccate, 2-spored ascospores: ellipsoid to narrowly ellipsoid, hyaline, muriform, many celled, 29-38 x 12-18 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on siliceous rocks World and Sonoran distribution: only known form western North America in the Sonoran region of Arizona (and in adjacent New Mexico) and Sonora, Mexico.