New records of species of the genera Corynoppia, Ramusella and Rhinoppia (Oribatida: Oppiidae) from Iran, with a key for Iranian oppiid mite species

Five oppiid mite species (Oribatida: Oppiidae) belonging to three genera (Corynoppia, Ramusella and Rhinoppia) are reported as new records for the mite fauna of Iran. Some of their morphological features and distributions in the world are presented. A key to the subfamilies, genera and species of all Iranian oppiid mites is given.