[Calicium glebosum var. concinnum F. Wilson, more, Calicium glebosum var. glaucescens F. Wilson, Calicium queenslandiae (F. Wilson) Tibell, Calicium sphaerocephalum var. queenslandiae (F. Wilson) Zahlbr., Calicium trachelinum var. queenslandiae F. Wilson, Calicium wilsonii Müll.Arg.]
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
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.