[Lecidea acrocyanea (Th. Fr.) H. Magn., more, Lecidea alaiensis Vain., Lecidea endolithea Lynge, Lecidea patavina A. Massal., Lecidea patavina f. fatiscens (Kremp.) Grummann, Lecidea patavina f. patavina A. Massal., Lecidea patavina var. aequata (Flörke) H. Magn., Lecidea patavina var. glabra (Kremp.) H. Magn., Lecidea patavina var. patavina A. Massal., Lecidea vulgata f. patavina (A. Massal.) Zahlbr.]
Thallus: indistinctly to distinctly crustose, continuous, strongly rimose, or sometimes irregularly areolate, up to 2 mm thick; prothallus: absent surface: chalky white, yellowish white to beige, dull, without soredia or isidia Apothecia: sessile to rarely semi-immersed, strongly constricted at base; 1.5-3 mm in diam. disc: black, plane to convex, epruinose margin: distinct, thin, lighter than thallus, sometimes with weakly whitish pruina exciple: bright green to bluish green, sometimes with few algal cells parathecium: hyaline, with crystals and/or oil droplets epihymenium: bright green to bluish green, rarely brown (if damaged ?) hymenium: hyaline, 65-110 µm tall, with oil droplets, rarely with crystals; paraphyses: simple, rarely anastomosing or branched, slightly thickened apically hypothecium: hyaline to rarely weakly brown, usually strongly filled with crystals, without oil droplets asci: clavate, lecanoral, 8-spored ascospores: hyaline, simple, broadly ellipsoid to ovoid, 10-17 x 6-10 µm; wall: thick and smooth, not halonate Pycnidia: globular, with Vobis-type III conidiophores conidia: filiform, strongly curved, 18-25 µm long Spot tests: thallus surface K- to K+ yellow, C- to very rarely C+ yellowish red, P- to P+ yellow Secondary metabolites: atranorin, hopane-6a,22-diol, and lichexanthone, rarely norlichexanthone, very rarely trichlorolichexanthone. Substrate and ecology: on non-calciferous or calciferous rocks World distribution: temperate parts of Africa, Asia, Europe, North and South America Sonoran distribution: at intermediate elevations in Arizona and Baja California.