Species of the genus Gonatocerus (Hym.: Mymaridae) in East -Azerbaijan province

The family Mymaridae (Hym.: Chalcidoidea) are cosmopolitan wasps، with about 103 valid genera and about 1،424 valid species worldwide، that are poorly known in Iran. In this study the genus Gonatocerus Nees (Hym.: Mymaridae) was studied in East- Azerbaijan province، located at northwestern Iran. Eight species are reviewed and identified from the studied area. The studied species in this research are as follow: G. (Cosmocomoidea) ater Förster، G. (Lymaenon) aureus Girault، G. (Lymaenon) litoralis (Haliday)، G. (Gonatocerus) longicornis Nees ab Esenbeck، G. (Lymaenon) novickyi Soyka، G. (Cosmocomoidea) oxypygus Foerster، G. (Gonatocerus) pictus (Haliday) and G. (Lymaenon) thryides (Debauche). Of which، five species consisting: G. ater، G. aureus، G. novickyi، G. pictus and G. thryides are recorded for the first time from Iran.