Polyplax borealis Ferris, 1933

Ex Alticola sp. (undetermined mountain vole), collection locality: Arhangai Province, Terhiin Tsagaan Nuur (Krištofıḱ, 1999).

Ex Cricetulus sp. (undetermined hamster), collection locality: Bulgan Province, Inget Tolgoy (Selenge Soum) (Krištofıḱ, 1999).

Notes: Polyplax borealis parasitizes several species of voles mainly in the northern Holarctic region (Durden and Musser, 1994). However, the collection from Alticola in Mongolia is a first and the collection from Cricetulus in Mongolia represents an atypical host association.