Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.

Notes: Lopezaria differs from Megalaria in having an ocular chamber in the tholus, from Catinaria in lacking a perispore; and from Megalospora in having 2-spored asci and a non-inspersed hymenium reacting I+ greenish blue. Because the genus is monospecific, a generic description would simply recapitulate the specific description given below.