Plants 0.5-7.5 × 0.3 mm. Stem unbranched; axillary hyaline nodules absent; central strand present or absent. Leaves as many as 12 pairs, lanceolate to oblong-lanceolate, occasionally narrowly lanceolate, acute to rarely apiculate, to 1.2 × 0.2-0.3 mm; dorsal lamina narrowed prox-imally, ending at or sometimes before insertion; vaginant laminae 1/2 leaf length, ± equal, minor lamina ending on or near margin; margin entire but serrulate to denticulate distally, limbate on all laminae, limbidium ending a few to several cells before leaf apex, not reaching proximal end of dorsal lamina, sometimes edged by 1 or more rows of quadrate cells in proximal part of vaginant laminae, limbidial cells 1-stratose; costa ending a few cells before apex to percurrent, bryoides-type; laminal cells 1-stratose, smooth, strongly bulging, ± obscure, firm-walled, irregularly quadrate to hexagonal, mostly 6.5-10 µm, in transverse section twice as deep as wide. Sexual condition rhizautoicous. Sporophytes 1-2 per perichaetium. Seta 1-4.5 mm. Capsule theca exserted, usually erect, radially symmetric, 0.2-0.8 mm; peristome bryoides-type; operculum 0.3 mm. Calyptra cucullate, smooth, 0.5 mm. Spores 10-16 µm.