TYPE. BRAZIL. Glaziou 5082 (M, lectotype designated by Wirth & Hale 1978).
Description.Life form: lichenized fungus.
[Modified from Wirth & Hale 1978] Thallus crustose, white to off-white, continuous, slightly roughened and matte; vegetative diaspores absent. Photobiont trentepohlioid alga. Ascomata lirellae, immersed to erumpent, slender, flexuose, black, frequently branched, usually with a low thalline margin, (1-)2-4(-6) mm long; disk barely visible from above. Exciple black, more or less closed; labia convergent, usually entire but barely striate in occasional sections; hymenium 60-70(-120) μm high. Asci 8-spored; ascospores hyaline, 6-9-celled, 6-8 x (20-)23-35(-50) μm.