Light micrographs of Haplodontium altunense A–C plants (dry) D Capsule (dry) E capsule (wet) F annulus growing on the capsule mouth G annulus falling off the capsule mouth H dorsal views of median peristome showing the large papillae along the horizontal and median vertical lines I dorsal views of distal peristome showing adherent endostomial material and exostome teeth J transverse section of stem K transverse section of midleaf L transverse section of costa M leaf apex N median laminal cells O basal laminal cells P leaves. Photographed by Xiaorui Wang from the holotype (HBNU!).