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

Thallus: crustose, areolate with marginal areoles sometimes sublobate, or central areoles developing into individual spherical verrucae, becoming inflated and attached to substrate by an umbilicus upper surface: light gray to ochraceous, mat or pruinose, without vegetative propagules upper cortex: phenocortex consisting of interwoven hyphae, structure often obscured by oxalate crystals medulla: composed of dense to lax hyphae, with dense crystals in part, algal layer discontinuous photobiont: primary one a Trebouxia, secondary photobiont absent Ascomata: apothecia, lecanorine, first innate or immersed, becoming sessile or stipitate disc: black or pruinose; epihymenium: red-brown with crystals included hymenium: hyaline, I+ blue; paraphyses: simple or weakly branched; hypothecium: colorless asci: cylindrical, Lecanora-type, 8-spored Ascospores: brown, 1-septate, Physcia-type, spore wall warted Conidiomata: pycnidial, immersed conidia: small, colorless, acutely or bluntly ellipsoid to obovate Secondary metabolites: atranorin, norstictic acid Geography: southwestern, coastal North America including Guadalupe Island Substrate: on acidic rock, rarely terricolous. Notes: Mobergia is separated from the genus Rinodina by its acutely ellipsoid to obovate conidia and the strongly warted ascospore walls.