relic fossils from Argentina is a strange new species can only be described as a "toothed squirrel".
Fossil bridges the gap of 60-million years in our knowledge of the evolution of early mammals in America, and the resemblance is so close to the ice ageScrat
The fossil is the first mammal from the early Late Cretaceous of South America, and they show evidence of the chewing muscles, as well as highly specialized teeth and the skull, unlike other mammals of this period throughout the world. Because of this, a new discovery shows a large amount of information about species specialise in period which we know little about.