Contribution to the fauna of Tydeidae (Acari: Prostigmata) from Western Siberia, Russia

The fauna of Tydeidae Western Siberia is reviewed. A total 27 species from eight genera were found in Tyumen and Kurgan Regions. Two species, Lorryia sibiriensis n. sp. L. speciosa are described as new for science; evansi Baker recorded Russia the first time redescribed based on materials Region; paravarsoviensis (Momen Lundqvist), subularoides Kaźmierski, arkadiensis Panou Emmanouel, argutus (Kuznetsov Petrov) comb., serpettae Lundqvist) szeptyckii (Kaźmierski) filiformis grandiinsignia Nudilorryia obsequens Paralorryia formosa (André), Calotydeus edwardbakeri (Kaźmierski), Tydeus nieuwkerkeni André, T. spathulatus Oudemans Metalorryia delicata (Kuznetsov) time. After examination holotype Livshitz this moved to Nudilorryia. Morphological characters separating two closely related catenulata (Thor) polita Kuznetsov, also provided.