What we call Panthera tigris emerged from the great cats of the early Pleistocene, nearly 3 million years ago. While subject to some debate in the scientific community, it is generally accepted that there are nine subspecies of tiger: Amur, Bali, Bengal, Caspian, Indochinese, Javan, Malayan, South China and Sumatran.
Extinction came for the Bali tiger first. By the 1940s, hunting and loss of habitat had sealed its fate. Those same anthropogenic pressures claimed the Caspian tiger by the end of the 1970s, and the Javan tiger by the 1980s.