Thylacosmilus

From Freepedia

Thylacosmilus was a marsupial saber-toothed cat that lived about 3 million years ago. It was not a relative of the placental saber-tooth cats, but rather a prime example of convergent evolution. Its was equipped with large teeth of continual growth and powerful shoulders, both of which allowed it to dismantle its prey. Remains of the animal have been found in parts of South America.