Smilodon populator, saber-toothed cat skull Pachycephalosaurus More than 6

More than 6

During the Late Cretaceous

65 million years ago

as their fossils are common in the Old Red Sandstone formation studied by geologists in the early 19th century

which lived worldwide throughout most of the Late Cretaceous

Smilodon populator, saber-toothed cat skull Pachycephalosaurus More than 6Smilodon populator Lund, 1841 Known locations: South America. Time period: Throughout the Pleistocene. Smilodon populator was the largest sabre tooth cat (popularly known as the sabre tooth tiger). It was a fierce predator up to 7. 5 feet long (not including the tail) and 4 feet tall. It weighed up to 880 pounds. It was a bit smaller than a modern day lion (Panthera Leo), but much heavier. It had relatively short legs and a short, bobbed tail a bit