Mironia Zand., Bull. Buffalo Soc. Nat. Hist. 32: 112. 1993.
Morinia Card., Rev. Bryol. 37: 124. 1910, not Morinia Berlese & Bresadola (1889) or Morinia Linn. (1753).
Plants small, medium- or robust-sized, reddish green above, distinctly red to reddish brown below. Stems with sclerodermis and central strand, irregularly branched, sparsely or densely radiculose. Leaves erect-sheathing at base, twisted, incurved above when dry, erect-spreading to spreading from the top of the sheathing base when wet, oblong to oblong-lanceolate, concave or keeled; apices acute to obtuse; margins bistratose, recurved in lower 3/4 or to near the apex, entire or dentate above, unbordered; costa subpercurrent, percurrent or excurrent as a sharp, smooth mucro, guide cells, ventral and dorsal stereid or substereid bands present, and ventral epidermal layer usually present; upper cells firm-walled, oblate to irregularly quadrate or rounded-hexagonal, pluripapillose by thick, c-shaped papillae, basal cells rectangular, smooth, thin-walled, alar cells not differentiated. Perichaetial leaves sheathing. Dioicous. Inflorescences terminal. Setae elongate. Capsules cylindric; opercula long-rostrate; annuli usually well-developed; peristome of 32, long, spirally twisted teeth, basal membrane short. Calyptrae cucullate, smooth.