Moldoustium haitlingeri Noei, Saboori & Šundić sp. nov. (Acari: Erythraeidae) is described from northern Iran and Montenegro. It is the second known species of the genus and was found in soil samples. Also, Hirstiosoma latreillei (Grandjean, 1947) and Fessonia papillosa (Hermann, 1804) (Acari: Smarididae) are reported for the first time from Iran.