Animals of the phylum Chordata can only be found on the island of Sumatra, Indonesia. Its population is estimated to live in the wild tail 400-500. Sumatran tiger (Panthera tigris sumatrae) is increasingly rare and are categorized as endangered species.
origin
Tigers are believed to be descendants of the ancient predators known as Miacids. Miacids alive at the end of the Cretaceous period about 70-65 million years ago during the reign of dinosaurs in West Asia (Andrew Kitchener, "The Natural History of Wild Cats"). The tiger then developed in eastern Asia in China and Siberia before berpecah two, one moving towards the forest of Central Asia in the west and southwest of the Caspian tiger. Some were moving from Central Asia to the western mountainous region, and beyond to the islands of southeast Asia and Indonesia, partly to keep moving west to India (Hemmer, 1987).
The Sumatran tiger is believed alienated when sea levels rose at 6,000 to 12,000 years ago. Cutting-edge genetic testing has revealed genetic markers unique, indicating that this subspecies has distinct characteristics with other tigers subspisies and very likely evolve into separate species, if managed sustainably.
