The American lion (Panthera atrox) was one of the largest Felids to have ever lived. A close relative of the Eurasian Cave Lion, P. atrox measured up to 2.1m long not including the tail and weighed in excess of 350kg. The animal was a major predator of the Pleistocene Megafauna of the Americas, only becoming extinct roughly 11,000 years ago.

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