A.  Crespo, Kauff, F., Divakar, P. K., del Prado, R., Pérez-Ortega, S., Amo de Paz, G., Ferencova, Z., Blanco, O., Roca-Valiente, B., Núñez-Zapata, J., Cubas, P., Argüello, A., Elix, J. A., Esslinger, T. L., Hawksworth, D. L., Millanes, A. M., M. Molina, C., Wedin, M., Ahti, T., Aptroot, A., Barreno, E., Bungartz, F., Calvelo, S., Candan, M., Cole, M., Ertz, D., Goffinet, B., Lindblom, L., Lücking, R., Lutzoni, F., Mattsson, J. - E., Messuti, M. I., Miadlikowska, J., Piercey-Normore, M. D., Rico, V. J., Sipman, H. J. M., Schmitt, I., Spribille, T., Thell, A., Thor, G., Upreti, D., and Lumbsch, H. T., ?Phylogenetic generic classification of parmelioid lichens (Parmeliaceae, Ascomycota) based on molecular, morphological and chemical evidence?, Taxon, vol. 59, pp. 1735-1753, 2010.

F.  Bungartz and Nash, T. H., ?The Buellia aethalea-group in the Greater Sonoran Desert Region with reference to similar species in North America?, Bryologist, vol. 107, pp. 441-458, 2004.

F.  Bungartz, Elix, J. A., Kalb, K., and Giralt, M., ?New and overlooked species from the Galapagos Islands: the generic concept of Diploicia reassessed?, Lichenologist, vol. 48, pp. 489-515, 2016.

T. H.  Nash, Ryan, B. D., Gries, C., and Bungartz, F., Lichen Flora of the Greater Sonoran Desert Region, vol. 2. Tempe, Arizona, USA: Arizona State University, 2001.

C. M.  Wetmore, ?Caloplaca?, in Lichen Flora of the Greater Sonoran Desert, vol. 3, T. H.  Nash, Gries, C., and Bungartz, F., Eds. Tempe, Arizona: Lichens Unlimited, 2007, pp. 179-220.