Description: Thallus crustose, episubstratic, continuous to rimose-areolate, pale grey to olive grey, mostly with a brownish tinge, blastidiate, forming irregular patches up to several cm in diam. Blastidia globular, club-shaped or cylindrical, sometimes flattened, often coralloid, 0.05-0.15(-0.25) mm thick, scattered to crowded and then forming a thick crust. Cortex with an olive to brownish pigment, K+ violet, N-. Apothecia usually present, dull to dark brown, somehow shiny, up to 0.8 mm across, with a flat to slightly convex disc, a thin proper margin, and a soon excluded thalline margin. Proper exciple brownish in outer part, colourless within, prosoplectenchymatous; epithecium brown, without crystals, K-, N-; hymenium colourless, 60-75 µm high; paraphyses simple or sparingly branched, 1.5-2.5 µm thick, the apical cells 3-5 µm wide; hypothecium colourless. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 2-celled, polarilocular, hyaline, 10-14 x 5.5-7 µm, the equatorial thickening (“septum”) 4-6 µm. Pycnidia blackish olive. Conidia ellipsoid to ovoid, 3-4 x 0.8-1 µm. Photobiont chlorococcoid. Spot test: thallus and apothecia K-, C-, KC-, P- (in section the thallus reacts K+ violet). Chemistry: thallus with the sedifolia-grey pigment; apothecia without anthraquinones.
Note: a recently-described epiphytic species, to be looked for in Mediterranean Italy.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)