Ceratodon Brid., Bryol. Univ. 1: 480. 1826.

Plants small, densely tufted; stems erect, simple or forked, densely foliate. Leaves ovate-lanceolate, gradually acuminate, acute, keeled; margins strongly reflexed to revolute, notched or irregularly serrulate near the apex; costa single, percurrent to short excurrent; cells smooth, elongate below, subquadrate above, thick-walled. Dioicous. Setae erect, elongate; capsules exserted, suberect; stomata present; annuli large, complex, revoluble; opercula conic; peristome single, teeth 16. Calyptrae cucullate.