Smilodon

Smilodon is an extinct genus of large saber-toothed cats that lived in the Americas during the Pleistocene. Its best-known species had elongated upper canine teeth and robust forelimbs.

Machairodontinae: An extinct subfamily of felids that includes saber-toothed cats. Smilodon belongs to this broader group of saber-toothed felids.
Saber-toothed cat killing behavior: The proposed ways saber-toothed cats used their bodies and teeth to kill prey. Smilodon's killing method is debated because its canines were vulnerable to sideways forces.
Homotherium: An extinct genus of machairodont cats with shorter, more flattened upper canines than Smilodon. Its different canine shape and body proportions show that saber-toothed cats were not all alike.
Quaternary extinction event: The widespread loss of large animal species during the late Pleistocene and early Holocene. Smilodon disappeared during this extinction, whose causes remain debated.
Felidae: The biological family comprising living cats and their extinct relatives. This family places Smilodon among cats despite its distinctive teeth.
Smilodon fatalis: A species of Smilodon known from abundant Pleistocene fossils in North America. Its skeletons and bite mechanics provide much of the evidence for the genus's behavior.
Thylacosmilus: An extinct South American marsupial predator with saber-like canines, unrelated to cats. It demonstrates that a saber-toothed appearance evolved outside the cat family.
Pleistocene megafaunal extinction: The late-Pleistocene loss of many large-bodied animal species across multiple continents. Smilodon's extinction forms part of this broader ecological turnover.
Saber-toothed cat: An extinct carnivorous mammal with greatly elongated canine teeth, evolved in several unrelated lineages. The common name captures a body plan that evolved beyond Smilodon alone.
Smilodon populator: The largest known species of Smilodon, found in South America. Its size and robust build show how the genus varied across the Americas.

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