It lived about 100 million years ago, making it one of the small mammals that likely lived alongside dinosaur populations.

Then they found the fossil of the head of a saber-toothed squirrel in Argentina, giving them a specimen that they could work on.

Forget saber-toothed cats; the hottest new species is the saber-toothed squirrel. … The fossilized skull and teeth of a fanged, shrew-like mammal have been found in Argentina, a new study says. "It looks somewhat like Scrat, the saber-toothed squirrel from 'Ice Age,' " he said.

A small extinct saber-toothed mammal dubbed Cronopio dentiacutus has paleontologists excited about the features it combines. Scientists Unveil Fossil Of 'Saber-Toothed Squirrel' That Lived Among Dinos. A bizarre pre-historic mammal that looked just like the fictional sabre-toothed squirrel in the Ice Age movies has been unearthed in South America. NPR: “ Scientists Unveil Fossil Of ‘Saber-Toothed Squirrel’ That Lived Among Dinos ”. But there is a large gap in the fossil … The two partial skulls and jaws, recently freed from their stony tomb of Cretaceous rock, were found in Argentina in 2002 in rock layers dated 100 million years old by … Tiny 'saber-toothed squirrel' found As suggested in the "Ice Age" movies, some crazy-looking creatures roamed the planet millions of years ago. Cartoon references aside, Rougier, Apesteguía and Gaetano …