Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Notes: Psora lurida was excluded from Psora by Timdal (1984) and left initially in the collective genus Lecidea. Hafellner and Türk (2001) placed it in Mycobilimbia, but as this genus is now more narrowly circumscribed by Ekman (2004), there is no genus for the species. Romjularia differs from Mycobilimbia sensu Ekman in having simple spores, an ascus of the Porpidia-type, and a squamulose thallus. See Timdal (1984) for a discussion on its affinity to Psora and Psorula. Because the genus is monospecific, it would be repetitious to have a separate generic description.