Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2002. Lichen Flora of the Greater Sonoran Desert Region. Vol 1.
Life habit: lichenized Thallus: umbilicate, squamulose, placodioid, subgelatinous when wet surface: olive or sometimes grayish pruinose, smooth or rimose anatomy: ecorticate, homoiomerous, densely reticulate photobionts: primary one a chroococcoid cyanobacterium, secondary photobiont Stigonema or absent Ascomata: absent or present, apothecial, laminal on thallus, orbicular, sometimes irregular, immersed to semi-immersed, margin indistinct to distinct, with thalloid rim ascoma anatomy: exciple: hyaline; epithecium: brownish yellow; hypothecium: hyaline asci: prototunicate, wall thin, non-amyloid, 8-spored ascospores: simple, rarely one-septate, ellipsoid; 9.5-14 µm x 6-8.5 µm; walls: thin, hyaline, rarely pale brownish Conidiomata: pycnidial, laminal, immersed conidia: bacilliform, c. 3 x 1 µm Secondary metabolites: none detected Geography: arid, semi-arid regions in SW North America and Central America Substrate: soil crusts over calcareous and volcanic rock. Notes: The presence of multiply divided hymenia is considered diagnostic of Pseudopeltula. In other characteristics it is similar to Gloeoheppia.