Putorius

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Polecats (subgenus Putorius) are mustelids in the genus Mustela. It includes four living species — the black-footed ferret or American polecat (Mustela nigripes), the domestic ferret (Mustela furo), the European polecat (Mustela putorius), and the steppe polecat (Mustela eversmanii). Polecats share the genus Mustela with members of the subgenera Lutreola and Mustela. Putorius was first described in 1817 by Georges Cuvier and included multiple related species. This was until 1877 when Putorius was reclassified to only include three species. In 1982, the subgenus Cynomyonax (black-footed ferrets) was merged into Putorius. The common ancestor of all species in Putorius used to live in central Eurasia. Eventually, a population of steppe polecat migrated to North America and evolved into the black-footed ferret.