Research overview: Machairodus and Amphimachairodus, the great Miocene sabercats

This overview surveys Machairodus and its later, larger relative Amphimachairodus, big scimitar-toothed cats that dominated late Miocene predator guilds across Eurasia, Africa, and North America. These animals approached or exceeded the size of modern lions and bore broad, serrated canines together with increasingly cursorial limb proportions, foreshadowing the body plan of later Homotherium. The survey reviews their taxonomy and the gradual evolutionary trend from Machairodus toward the more derived Amphimachairodus giganteus, their likely role as open-country hunters of large herbivores, and their importance as some of the earliest cats to attain truly large body size. It situates the Homotherini within the broader story of how the scimitar-toothed lineage radiated and spread between continents.