1. Gymnostomiella longinervis Broth. 长肋疣壶藓 chang-le you-hu xian
Philipp. J. Sci. 13: 205. 1915. Type. The Philippines: Panay, Iloilo Province, Robinson 18053.
Plants very small, soft, green or yellowish green, in dense tufts. Stems erect, slender, simple or rarely branched, sparsely foliate below, radiculose at base; central strand absent. Leaves erect, lingulate or oblong-obovate to spatulate, slightly concave above, constricted at base, rounded-obtuse or bluntly acute at apex; margins plane, entire below, finely crenulate because of papillose cells; costa slender, ending several cells below leaf apex; upper leaf cells lax, thin-walled, quadrate to hexagonal, papillose; lower cells elongate, rectangular, hyaline and smooth. Dioicous. Gemmae present in upper leaf axils. Perichaetial leaves enlarged, slightly sheathing at base; inner perichaetial leaf cells smooth, serrulate at apex. Setae thick, yellowish; capsules ovoid, reddish brown; opercula conic, long-rostrate; annuli none; peristome absent. Calyptrae narrowly cucullate. Spores small, spherical.