North America, Mexico, West Indies, Central America, South America, Europe, Asia, Atlantic Islands, Pacific Islands, Australia.
Genera 3, species 15 (1 genus, 2 species in the flora).
Diphysciaceae’s three genera are Diphyscium with ca. 12 species, Theriotia Cardot with two species in Southeast Asia, and Muscoflorschuetzia Crosby with one species in Chile. The three were recently merged (Z. L. K. Magombo 2003) into a single genus, Diphyscium, with 15 species.