Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Life habit: lichenized Thallus: crustose, granulose to coralloid or areolate surface: blackish with dark green tinge, dull to slightly glossy, smooth to granulose, warty or coralloid anatomy: ecorticate, homoiomerous, paraplectenchymatous photobionts: primary one a small-celled chroococcoid cyanobacterium with thin, yellowish brown gelatinous sheath, secondary photobiont absent Ascomata: absent or present, apothecioid, laminal, circular, semi-immersed to sessile, disc at first depressed, soon plane or slightly convex and umbonate, with thin, finally receding thalloid rim ontogeny: hemiangiocarpous, ascogonia formed in a spheroid tangle of generative hyphae soon breaking through the thallus surface exciple: thick, testaceous or yellowish to reddish brown, internally hyaline, epihymenium pale hymenium: soon divided by intrusions of sterile hyphae; hypothecium: pale yellowish brown or hyaline, asci: prototunicate, thin-walled, not amyloid but with thin amyloid outer coat (hymenial gelatin); asci: clavate, 8-spored ascospores: hyaline, simple, ellipsoid to broad ellipsoid; 18-25 x 8-12.5 µm, wall thin but sometimes thick with age Conidiomata: not observed Secondary metabolites: none detected Geography: world-wide in tropical and subtropical regions Substrate: on various rocks and tree bark. Notes: Leprocollema was only recently recognized among the cyanolichens of the Sonoran Desert. Thus, it was not treated in the cyanobacterial lichen key published in volume 1 of the Flora, but is included in the revised key (Vol. III). The genus is in urgent need of revision. It is probably closely related to Lemmopsis.