Description: Thallus inapparent, the hyphae immersed into gelatinous algal films, probably not lichenized (perhaps a parasite of algal colonies). Perithecia globose to elliptical, not flattened, 0.06-0.13 mm across, pale to dark brown, surrounded by a thin, colourless gelatinous layer, the ostiole 12-30(-60) µm, distinctly paler. Exciple of pigmented, periclinally oriented hyphae; paraphyses thin, thread-like, simple, slightly thickened above. Asci 32-spored, clavate-cylindrical, moderately thick-walled, non-fissitunicate, the entire ascus wall I+ and K/I+ blue, (35-)40-55(-67) x (7-)8-10(-11) µm. Ascospores 1-septate, hyaline, fusiform, thin-walled, 13-16(-18) x 1.5-2(-2.5) μm, with 1-2(-3) μm long, thread-like appendages at both ends. Photobiont chlorococcoid (Coccomyxa-type). Spot tests: all negative. Chemistry: without lichen substances.
Note: on algal colonies developing on dying mats of Grimmia and Hypnum in the montane and subalpine belts; certainly overlooked, and more widespread in the Alps.
Growth form: Fungus
Substrata: soil, terricolous mosses, and plant debris