Smilodon fatalis
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{{Taxobox | color = pink | name = Smilodon fatalis | image = Smilodon fatalis.jpg | status = Conservation status: Fossil | regnum = Animalia | phylum = Chordata | classis = Mammalia | ordo = Carnivora | familia = Felidae | subfamilia = Machairodontinae | genus = Smilodon | species = S. fatalis | binomial = Smilodon fatalis | binomial_authority = (Leidy, 1869) }} Smilodon fatalis ("the deadly Smilodon") is possibly the best-known of the machairodontine saber-toothed cats. It appeared in North America about 1.6 million years ago and later migrated down the west coast of the continent to Peru. It became extinct around 10,000 years ago. Smilodon fatalis ranged in weight from 600 to 800 lb (270 to 360 kg) and ranged in height from 39 to 47 inches (1 to 1.2 m).