Lecanora comoduensis (Lecanorales: Lecanoraceae), a new species of lichenized fungi from the Sonoran Desert region

The new lichenized ascomycete species Lecanora comonduensis is described from Mexico (Baja California Sur and Chihuahua) and Arizona, U.S.A. It belongs to a small group of Lecanorae with sunken apothecia and is unique in possessing a profusion of crystals in the medulla and amphithecium, as occurs in a more limited way in the amphithecium of the Lecanora subfusca group. Superficially is is perhaps most similar to Heppsora, but differs significantly from thar monotypic genus in various characters, including its ascal structure. The new species contains atranorin and norstictic acid and is at least facultatively lichenicolous.