Ocellularia vizcayensis Rivas Plata, Duya & Lücking  

Mycobank MB 517801

Thallus white, distinctly areolate, with loose, irregular cortex; photobiont layer and/or medulla with large clusters of calcium oxalate crystals. Apothecia immersed to erumpent in thalline warts, round, 0.8–1.5 mm diam.; disc covered by very narrow, 0.05–0.1 mm wide pore; margin with a broad, red-brown to purplish brown zone around the ostiole. Columella absent. Excipulum strongly carbonized laterally, jet-black, 100–200 µm wide; periphysoids absent. Hymenium 250–400 µm high, clear; paraphyses unbranched. Ascospores 1–2 per ascus, 15–29-septate, 100–300 x 15–30 µm, oblong-fusiform, with thick septa and lens-shaped lumina, colourless, I+ violet-blue. Secondary chemistry: no substances detected by TLC.