Orthodontium Schwaegr., Sp. Musc. Frond., Suppl. 2(2)2: 123. 1827.
Apalodium Mitt., J. Linn. Soc., Bot. 12: 238. 1869.
Stableria Lindb. ex Braithw., Brit. Moss. Fl. 2: 140. 1890.
Plants small in erect, dense or loose tufts; stems simple or forked, central strand present or absent. Leaves erect‑spreading to spreading when wet, flexuose and twisted when dry, linear-lanceolate or setaceous; apices acute or acuminate; margins plane or weakly recurved below, entire to serrulate near apex; costa strong, percurrent, stereid cells present or absent; cells smooth, thin‑ or firm‑walled, linear to linear-rhomboidal above, lax, oblong-rhomboidal below. Paroicous or autoicous. Setae elongate, straight or flexuose. Capsules subcylindrical to ovoid, erect, symmetric, smooth, neck well-developed; stomata superficial; opercula obliquely rostrate; annuli rudimentary and persistent; peristome double, exostome teeth16, inserted within mouth, linear, smooth or weakly papillose, yellow to orange-yellow, endostome yellow, smooth to lightly papillose, basal membrane rudimentary to short, segments not keeled or perforate, cilia absent. Spores spherical, papillose or papillose-warty. Calyptrae cucullate.