| abstract | During a study of predatory mites in Western Siberia, a new species, Stigmaeus amphibius sp. n. (Acari: Stigmaeidae), was collected from wet soil near a lake. Eryngiopus hamedanicus Khanjani, Mohammadi and Nazari, 2014, Eustigmaeus bisetalis (Doğan, 2004) comb. n. (from Ledermuelleriopsis), E. vacuus Doğan, 2005, Ledermuelleriopsis rizeiensis Doğan, 2004 and L. plumosa Willmann, 1951 are recorded from Russia for the first time. Females of Eustigmaeus bisetalis and Ledermuelleriopsis rizeiensis are redescribed based on materials from Western Siberia. |