Amphimachairodus giganteus. Illustration and photo-reconstruction of the ancient sabre-toothed cat Amphimachairodus giganteus standing on the edge of a forest. Amphimachairodus giganteus is an extinct genus of large machairodonts. It inhabited Eurasia and Northern Africa during the late Miocene epoch. Amphiachairodus kabir was a large species from Central Africa whose size may have approached up to 400 kilograms. It was about 2 metres long and probably hunted as an ambush predator - its legs were too short to sustain a long chase, so it most likely was a good jumper.