Leptodontaceae is a family of mosses belonging to the order Hypnales.

The secondary stems are erect, sometimes incurved when dry and generally pinnately branched.

The branches are in single plane, they have pseudoparaphyllia (the trichome-like or foliose structures on moss stem surfaces).

[10] They are defined by the combination of epiphytic habit, branching pattern of clusters of branches alternate with unbranched intervals bearing inflorescences, double sporophytic phenological cycle in which two cohorts of sporophytes mature simultaneously with embryos overwintering, subfoliose pseudoparaphyllia, cucullate calyptrae, sheathing post-fertilization perichaetial leaves (the leafy involucre surrounding the fruit stalk), central strands lacking in shoots, shortened setae (bristles), no annuli, and an exostome (the outer ring of peristome teeth) that flexes open when moist and flexes inward when dry (hydrocastique), thus serving to disperse spores during wet periods.

[2] As accepted by GBIF[1] Figures in brackets are how many species per genus