The 11 species of mustelid badgers are grouped in four subfamilies: Melinae (four species, including the European badger), Helictidinae (five species of ferret-badger), Mellivorinae (the honey badger or ratel), and Taxideinae (the American badger); the respective genera are "Arctonyx", "Meles", "Melogale", "Mellivora" and "Taxidea". Badgers include the most basal mustelids; the American badger is the most basal of all, followed successively by the ratel and the Melinae; the estimated split dates are about 17.8, 15.5 and 14.8 million years ago, respectively. The two species of Asiatic stink badgers of the genus "Mydaus" were formerly included within Melinae (and thus Mustelidae), but more recent genetic evidence indicates these are actually members of the skunk family (Mephitidae).