Abstract
In Romania, phytoseiid mites was notified sporadically with the occasion of some ecological works referring to the whole Mesostigmata. Seven years of investigations carried out in Danube Delta Biosphere Reserve led to the identification of 12 species belonging to the family Phytoseiidae (Acari: Mesostigmata) namely Amblyseius meridionalis Berlese, A.obtusus (Koch) sensu Karg, A. terreus Kolodochka, Graminaseius graminis (Chant), Neoseiulus alpinus (Schweizer), N. cinctutus (Livshitz and Kuznetsov), N. extricatus (Kolodochka), N. tervus Meshkov, Proprioseiopsis messor (Wainstein), P. scurra (Wainstein and Beglyarov), Transeius macrospermathecus Papadoulis, Emmanouel and Kapaxidi, Typhlodromus (Anthoseius) kerkirae Swirski and Ragusa. With the exception of A. meridionalis and A. obtusus the rest of the species are reported for the first time from Romania.