A partial skull and lower jaw with associated postcranial skeleton of Didymoconus berkeyi Matthew and Granger, 1924 was recently collected from the late Oligocene of Lanzhou Basin, Gansu Province, China. Besides being the first discovery of this genus in the Lanzhou Basin, the new material of Didymoconus represents the most complete individual of this species. The new specimen is paleomagnetically bracketed between 27–30 Ma in the Lanzhou section and helps to refine the biostratigraphy of this species elsewhere in eastern Asia. The postcranial skeleton provides valuable insight into its locomotion apparatus and offers possible characters for phylogenetic positioning of this enigmatic form. An enlarged hand and claws, along with a strong forelimb and robust skull, suggest fossorial adaptations.