Plants: very small, budlike, dull dark-green to brownish green, in scattered, gregarious or sometimes very small clumps. Thallose protonematal flaps persistent and usually present. Stems: few, very short, less than 0.05 cm; flagelliform shoots may occur at the base of the stem, 0.2–0.5 cm, with 3-ranked, tightly appressed linear to lanceolate leaves. Leaves: of main stem few, appressed, ovate, acuminate, or obtuse, margins entire or dentate, to 1.2 mm; costa single, weak or absent; laminal cells rhombic or rectangular. : Specialized asexual structures absent. Sexual: condition: perichaetial and perigonial buds occurring on the same protonema; perichaetial leaves ovate to ovate-lanceolate, concave. Seta: 3–8 mm, straight, smooth, slightly twisted when dry. Capsule: 0.6–1 mm, ovate to shortly oblong-cylindric, straight; operculum conic, obliquely apiculate; peristome usually not splitting or appearing to be more than four. Calyptra: smooth or somewhat plicate, yellowish. Spores: smooth or finely papillose, 10–16 µm. North America, South America (Chile), Eurasia, Pacific Islands (New Zealand).