Plants slender, brown to dark brown, up to 2 cm high, in dense tufts. Stems erect or ascending, single or forked. Leaves 0.6–0.7 mm × 0.30–0.35 mm, imbricate, erect-spreading when dry, distinctly concave, narrowly lanceolate from an ovate base, acuminate; margins entire, incurved throughout on both sides; upper and median laminal cells quadrate to short-rectangular, 6–8(–10) µm × 5–6 µm, irregularly thick-walled, distinctly papillose; basal cells near margins with papillae similar to the median cells; central basal cells elongate, 20–30 µm × 3–5 µm, irregularly thick-walled, more or less pitted. Dioicous. Perichaetial leaves oblong-lingulate, acute, about 2 mm long. Capsules ovate-oblong, upper half of capsules dark-brown, split into 4 or 5 valves when mature, lower half yellowish, never splitting. Spores yellowish brown, 17–22 µm in diameter, finely papillose. (Only male plants were seen. Sporophyte characters were adopted from Noguchi 1936.)