Temporal range: Miocene - Pliocene
Thylacosmilus is a extinct genus of carnivorous marsupials found as fossils in deposits dated from about 10 million to 3 million years ago (late Miocene to late Pliocene Epoch) in South America. Thylacosmilus was sabre-toothed and was about as large as a modern jaguar. To a remarkable degree, Thylacosmilus paralleled the evolution of sabre-toothed cats. Its canine teeth were long and powerfully developed; they were used for stabbing prey and fit into a well-developed flange, or projecting edge, in the chin region of the lower jaw.