The present paper deals with the members of oribatid mites of the genus Ghilarovus. Three new species, Ghilarovus krivolutskyi sp. nov., Ghilarovus mongolicus, sp. nov. and Ghilarovus khentiicus sp. nov., collected from dry steppe, mountain-steppe and taiga forest habitats in southern Russia, and central, north and eastern parts Mongolia, are described on the basis of adults. In addition, an unknown species, Ghilarovus sp. is illustrated and characterized. Data on ecology and biogeography of the Ghilarovus species known in the world, and the systematics of some genera of Zetomotrichidae are discussed. A key to the known species of Ghilarovus in the world is given.