Abstract: Two types of jerboa are found from Loc. 30 of Baode, Shanxi Province. The three-toed jerboa Dipus fraudator is the dominant taxon, accompanied with few teeth of the five-toed jerboa Paralactaga cf. P. suni. Although the diversity of this jerboa assemblage is not as high as that from Ertemte fauna, the two assemblages are fairly similar to each other. The jerboa assemblage from Baode is quite different to that from the Bahe Formation, where the dominant member is Protalactaga. The Lantian assemblage also contains one tooth assigned to Paralactaga sp., but it is much primitive than any known species. The Baode jerboa assemblage then has no shared taxa with that of Lantian. Although the small mammals from Baode have not been fully studied, the difference between the Bahean and Baodean small mammals is already evident. Jerboas are associated with high large mammal hypsodonty values from 10 Ma onwards and can be regarded as a proxy for relatively arid environments since the Late Miocene. The steppe environment suggested by these jerboas for Loc. 30 is consistent with the early analyses of the large mammals and the stable isotopes from ungulate teeth. The two different biomes traditionally recognized in the Baode area are separated temporally other than spatially.