Life habit: lichenized; Thallus: verrucose, areolate or subimmersed, pale brownish yellow to beige; Apothecia: 0.75-1.1 mm high, 6-9 times as high as the width of the stalk; stalk: shining black or with a brownish pruina in the uppermost part, rather thick, 0.8-0.16 mm in diam., consisting of dark greenish brown, sclerotized, and irregularly interwoven, 2-3 µm thick hyphae; outermost part: pale brown, surrounded by a 2-4 µm thick, hyaline, I-, gelatinous coat; capitulum: broadly obconical to lenticular, black, with a brownish or sometimes bright yellow pruina on the lower side, 0.29-0.45 mm in diam.; mazaedium: with a faint yellow pruina, particularly in young ascomata; exciple: densely interwoven and heavily sclerotized hyphae; hypothecium: with flat upper surface, dark brown, with reticulately interwoven hyphae; asci: cylindrical, with uniseriate or slightly overlapping spores, 33-36 x 3.5-4.5 µm; ascospores: ellipsoid, distinctly ornamented with spirally arranged ridges and a few irregular cracks, 10.5-12.5 x 5-6 µm; Spot tests: thallus K+ yellow turning red or K-, C-, P+ yellow, UV+ intensely yellow or dull (varying amounts of xanthones); brown pruina: K+ violet-red, with feather-like crystals; all parts of apothecia I-; Secondary metabolites: thallus with placodiolic acid, +norstictic acid, and unidentified xanthones.; Substrate and ecology: on bark of Jatropha at low, coastal elevations; World distribution: Africa, North, Central. and South America, and Australasia; Sonoran distribution: Baja California.
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