South Asian river dolphin display the variances needed to support their classification as separate species. Thus, at present, a single species with two subspecies is recognized in the genus "Platanista", "P. g. gangetica" (Ganges river dolphin) and "P. g. minor" (Indus river dolphin). An assessment of divergence rates in mitochondrial DNA of the two subspecies indicates that they diverged from a common ancestor around 550,000 years ago. This ancestor is thought to have been a marine Platanistid inhabiting the epi-continental seas in South Asia during the sea level rises in the middle Miocene. The earliest fossil identified as belonging to the species is only
Zoo Tycoon 2: Endangered Species Zoo Tycoon 2: Endangered Species Zoo Tycoon 2: Endangered Species is the first of the "Zoo Tycoon 2" expansion packs (The others are "", "", the downloadable "" and ). It gives the player 20 new animals, some of them are rare, such as the Florida Panther and the koala, as well as giving the player new innovations such as sky trams, Jeep rides, elevated paths and several new campaigns and challenges. With the addition of this expansion pack, the player can create a Jeep Wrangler or Jeep Commander tour through the zoo's exhibits. The new sky tram routes allow