美洲獾
The American badger is a member of the Mustelidae, a diverse family of carnivorous mammals that also includes weasels, otters, ferrets, and the wolverine. The American badger belongs to the Taxidiinae, one of four subfamilies of mustelid badgers – the other three being the Melinae (four species in two genera, including the European badger), the Helictidinae (five species of ferret-badgers) and the Mellivorinae (the honey badger); the so-called stink badgers are mephitids. The American badger's closest relative is the prehistoric "Chamitataxus". Among extant mustelids, the American badger is the most basal species; its lineage is thought to have split off from the rest of the Mustelidae about 18 million years (Ma) ago, following the split of mustelids from procyonids about 29 Ma ago.