1. Regmatodon declinatus (Hook) Brid. 异齿藓 yi-chi xian
Bryol. Univ. 2: 294. 1827. Pterogonium declinatum Hook., Trans. Linn. Soc. London 9: 309. 1808. Type. Nepal: Buchanan s.n.
Regmatodon declinatus var. minor Broth., Symb. Sin. 4: 94. 1929. Type. China: Guizhou, Dschenning (Zhen-ning) and Hwangtsaoba (Xing-yi), Handel-Mazzetti 10395 (holotype H).
Regmatodon schwabei Herz., J. Hattori Bot. Lab. 14: 66. 1955.
Plants small, brownish green, dull. Primary stems creeping, lateral stems erect or ascending, irregularly branched; branches unequal in length, curved, 1.0–1.5 cm long. Leaves oblong-ovate, 0.9–1.3 mm × 0.3–0.5 mm, acuminate, with short apices; leaf margins plane or slightly involute, entire; costa single, strong, reaching middle part of the leaf or slightly above; leaf cells thick-walled, irregularly rhomboidal or rectangular, 10–13 µm × 5–7 µm, with several rows of quadrate to subquadrate cells at basal margins. Monoicous. Inner perichaetial leaves sheathing at base, piliferous upwards, entire. Setae 5 mm long, erect, reddish brown, coarsely papillose; capsules erect, symmetric, cylindrical, ca. 2 mm long, mouth contracted; exostome teeth short, yellowish, ca. 0.2 mm long, blunt at apex, yellowish, with many lamellae; endostome segments yellowish, 0.40–0.45 mm long, papillose, perforate, with conduplicative processes; opercula with obtuse beaks. Calyptrae cucullate, ca. 2 mm long. Spores spherical, 22–25 µm in diameter, brownish, verrucose.