Trematodon paradoxus Hornsch.

Plants very small, in scattered groups, green; terricolous. Stems 1-2 mm high; in section central strand small, inner cortical cells large, thin-walled, outer cortical cells in 2 rows, small, incrassate, red. Leaves erect, weakly flexuose dry, erect-spreading wet; oval to oblong, abruptly linear, 1.5-2.0 mm long; apex obtuse, occasionally acute; margins plane, entire, unistratose. Costa sub-percurrent, in section guide cells 4, exposed ventrally, dorsal stereid band 1-2 cells thick, dorsal surface cells larger, weakly thickened, occasionally extending upward interrupting stereid band. Laminal cells bulging, rectangular above shoulders, in 1-3 rows on either side of costa at apex; marginal cells bulging; basal cell long-rectangular or oblong-hexagonal, lax. Perichaetial leaves oblong-subulate, 2.0-2.5 mm long. Seta erect to flexuose dry, 2-3 mm long, yellow; capsule erect, yellow, urn 1 mm long, neck 0.8-1.0 mm long, strumose; peristome absent; operculum rostrate, 0.6-0.8 mm long; calyptra cucullate, covering operculum and capsule mouth; spores ± round, 30-35 µm, coarsely papillose.