Thylacoleo, like the saber-toothed tiger.

Thylacoleo, a submammal predator of the same class as the saber-toothed tiger, survived in the Pleistocene Australia, and its late species, Thylacoleo carnifex, could reach the size of a large modern leopard.
The appearance of the marsupial lion is absolutely a miracle in the history of mammalian evolution. It belongs to Diprotodontia. Its ancestors were plant-eating animals like kangaroos and koalas, but in a short time, the marsupial lion emerged from vegetarianism to meat-eating, and became the top of the Pleistocene Australian ecosystem. Predator. Like other members of the order Biportata, the canine teeth of the Baggy Lion have long been degraded and disabled, so it uses steel chisel-like front teeth as its killing weapon, while the cheek teeth originally used to grind plants have evolved into sharp scraper-like shapes, and the efficiency of gnawing meat is no less than that of carnivorous beasts. In addition to its powerful biting power (some researchers believe that the marsupial lion has the best biting power among carnivorous mammals of the same size), the marsupial lion can kill far more prey than its own size, including its distant relatives and the giant herbivore Diprotodon.