Stems to 1.5 cm. Stem leaves ovate-ligulate to ovate-lanceolate, 1--2 mm, distal margins usually twice revolute; apex rounded-obtuse; costa ending in an apiculus or short mucro, adaxial surface of costa at midleaf concave, with (4--)6 guide cells; distal laminal cells 8--10 µm wide, 1:1. Specialized asexual reproduction absent. [Perichaetial leaves weakly differentiated, elliptical.] Sporophyte not seen.

Soil, limy shale, boulders, lava, canyons, shady banks, bluffs; 910--1520 m; Ariz., N.Mex., Tex.; Mexico; South America; Africa (Kenya).

This species is distinguishable from P . crinitum by its apiculate apex, twice-revolute leaf margins---these enclosing thin-walled cells, and smaller distal laminal cells, these strongly bulging on both sides though this obscured by dense papillae. It is quite similar to Tortula atrovirens , the basis for an erroneous report of that species from Colorado by W. A. Weber (1973), but differs by its crescentic costal section (rounded in the latter species) and thin-walled leaf marginal cells. Pseudocrossidium replicatum is characteristic of the Latin American cordillera and arid Mexico reaching north to western U.S.A.