Pygeretmus Gloger, 1841 . Gemeinn. Hand. Hilfsbuch. Nat., 1:106.

TYPE SPECIES: Dipus platurus Lichtenstein, 1823 (emended to D. platyurus by Lichtenstein, 1828).

SYNONYMS: Alactagulus, Platycercomys, Pygerethmus (see Ellerman and Morrison-Scott, 1951).

COMMENTS: Includes Alactagulus (see Heptner, 1984; Pavlinov and Rossolimo, 1987; Shenbrot, 1984). Vorontsov et al. (1969b) found no distinguishing karyological characters between subgenera Alactagulus and Pygeretmus; in the same study karyotypes and morphometric comparisons of subgenus Pygeretmus were provided. Shenbrot's (1984) subgeneric classification is followed below.