Question: 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? 

The Panthera tigris sudanensis is a claimed subspecies of tiger, not scientifically recognised, allegedly living in Africa.  It was described in 1951 by Paul E. P. Deraniyagala, based on a fur he saw in a Cairo bazaar.  When he asked the seller for information, Deraniyagala was told the animal was shot in the Sudan.  As Mazák wrote in 1980, it was either a joke or the seller felt obliged to be polite and answer any question, whether with truth or an invention.  Deraniyagala took a picture of the specimen's fur, which, when published, made the scientists say, according to the pattern of stripes, it was most likely a fur of the Caspian tiger ("Panthera tigris virgata") and the fur must have been smuggled from Iran or Turkey.  At that time, the Caspian tiger was nearly extinct.  If a photo were enough for a scientific description, "Panthera tigris sudanensis" would now be one of the Caspian tiger's synonyms; as Mazák wrote, "the situation is half-humorous, half-ironic."  Tigers are not known to have ever inhabited Africa. <SEP> The Siberian Tiger Introduction Project involves reestablishing populations of the Siberian tiger ("Panthera tigris altaica)", also known as the Amur tiger, in their former range and also expanding their range by introducing them as replacements of their genetically similar relative, the extinct Caspian tiger ("Panthera tigris virgata") which inhabited Central and Western Asia.  Currently, the Siberian tiger inhabits the cold mountains of the Russian Far East and northern China. <SEP> 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.  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.  Depending on the region, it was also called Hyrcanian tiger, Turanian tiger, Persian tiger, and "Babre Mazandaran" (Persian: ‎ ‎ , Tiger of Mazandaran). <SEP> Azerbaijan is situated in the Caucasus region of Eurasia.  Three physical features dominate Azerbaijan: the Caspian Sea, whose shoreline forms a natural boundary to the east; the Greater Caucasus mountain range to the north; and the extensive flatlands at the country's center.  About the size of Portugal or the state of Maine, Azerbaijan has a total land area of approximately 86,600 square kilometers, less than 1% of the land area of the former Soviet Union.  Of the three Transcaucasian states, Azerbaijan has the greatest land area.  Special administrative subdivisions are the Nakhchivan Autonomous Republic, which is separated from the rest of Azerbaijan by a strip of Armenian territory, and the Nagorno-Karabakh Autonomous Region, entirely within Azerbaijan.  (The status of Nagorno-Karabakh was under negotiation in 1994.)  Located in the region of the southern Caucasus Mountains, Azerbaijan borders the Caspian Sea to the east, Georgia and Russia to the north, Iran to the south, and Armenia to the southwest and west.  A small part of Nakhchivan also borders Turkey to the northwest.  The capital of Azerbaijan is the ancient city of Baku, which has the largest and best harbor on the Caspian Sea and has long been the center of the republic's oil industry.