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Although the present-day distributional boundary between the European badger (Meles meles) and the Asian badger (Meles leucurus) is around the Volga River, studies of ancient bone remains have indicated changes in the distribution of M. meles and M. leucurus in the Urals–Volga region during the Holocene. To examine past changes in distribution using genetic data, changes in genetic diversity, and the relationships of Holocene to modern populations, we sequenced ~150 bp of the mitochondrial DNA control region from the 44 ancient badger remains excavated from European Russian, Ural and Western Siberian sites, and we detected 12 haplotypes. Our study revealed Holocene changes in the distributional boundary between these badger species. Meles meles inhabited the Ural Mountains east of the Volga River in the Early Holocene, whereas M. leucurus expanded its distribution westwards, starting ~2500 years ago. Thereafter, M. leucurus rapidly replaced M. meles in the region between the Urals and the Volga, resulting in the present-day boundary in the Volga–Kama region. Among the 12 haplotypes detected, three for M. leucurus and four for M. meles were identical to partial sequences of haplotypes detected in modern populations, indicating considerable genetic continuity between Holocene and modern populations.

Holocene changes in the distributions of Asian and European badgers (Carnivora: Mustelidae: Meles) inferred from ancient DNA analysis