What was the other name for the extinct tiger subspecies, which inhabited the sparse forests and riverine corridors west and south of the Caspian Sea, from Turkey, Mesopotamia, Iran and the Caucasus, that has a project reestablishing populations of the Siberian tiger by introducing them as replacements to the extinct tiger?
Caspian tiger The Caspian tiger ("Panthera tigris virgata") is an extinct tiger subspecies, which inhabited the sparse forests and riverine corridors west and south of the Caspian Sea, from Turkey, Mesopotamia, Iran and the Caucasus, through Central Asia to the Takla Makan desert of Xinjiang in China, until the end of the 20th century. Depending on the region, it was also called Hyrcanian tiger, Turanian tiger, Persian tiger, and "Babre Mazandaran" (Persian: ‎ ‎ , Tiger of Mazandaran). It was one of the largest big cats to have ever lived and was described as being intermediate in size between Siberian and Bengal tigers.
Khanates of the Caucasus The Khanates of the Caucasus, or Azerbaijani khanates or Persian khanates, were various principalities established by Persia (Iran) on their territories in the Caucasus (modern-day Azerbaijan Republic, Armenia, Georgia and Dagestan) from the late Safavid to the Qajar dynasty. The Khanates were mostly ruled by Khans of Turkic (Azeri) origin and were vassals and subjects of the Iranian shah (King). Persia permanently lost a part of these khanates to Russia as a result of the Russo-Persian Wars in the course of the 19th century, while the others were absorbed into Persia.