Recent collections of pseudoscorpions resulted in a first record and a new species from Iran. Olpium
omanenseMahnert, 1991 originally described from Oman is recorded for the first time from Iran. Three congeneric
species with similar morphometric characters and trichobothrial patterns, Olpium intermediumBeier, 1959, O. lind-bergi,Beier, 1959 and O. omanensecan be separated by the setal numbers on the posterior margin of the carapace
and tergite I. Also, specimens reported as Olpium lindbergiBeier, 1951 from Pakistan were probably misidentified and
belong to O. omanense. The new species Cardiolpium bisetosum sp. nov.is described based on males from Markazi
province, western Iran. Morphometric data are given in comparison to related species.
