The female, male and protonymph of Spinturnix otonycterisi Dundarova & Orlova, sp. nov. (Acari: Spinturnicidae) are described from specimens collected on the enigmatic and rarely captured vespertilionid bat Otonycteris leucophaea (Severcov, 1873) in South Kazakhstan. A key for the identification of the species of Spinturnix von Heyden, 1826 found in Kazakhstan is provided.