Research overview: convergent evolution of the sabertooth form across lineages

The sabertooth body plan evolved repeatedly in unrelated lineages, and this overview reviews this striking convergence and what it reveals. True cats produced sabertooths such as Smilodon and Homotherium, but so did the nimravids and the marsupial Thylacosmilus, each independently arriving at enlarged canines and associated skull and neck modifications. Such repeated evolution suggests the form was a recurrent, effective solution for killing large prey. Researchers map convergence through phylogenetics and comparative functional anatomy. Why it matters: convergence on the sabertooth form is one of the clearest natural experiments in predator evolution, showing how similar ecological pressures sculpt similar anatomies across distant branches of the mammalian tree, and it frames living conical-toothed cats as just one of several outcomes the predatory carnivore form has taken.