Xenosmilus
Xenosmilus hodsonae (from Greek, , "xenos", "strange" + , "smilē", "chisel" ) is an extinct species of the Machairodontinae, or saber-toothed cats. The species name "hodsonae" originates from Debra Hodson, the wife of a researcher. Two fairly intact specimens were found by amateur fossil hunters in 1983 (1981 by some sources) in the Haile limestone mines in Alachua County, Florida. In 1994, the fossils were examined, and it was decided that the cats were of an entirely new genus. The fossils were of Irvingtonian age (1.8 to 0.3 Ma). Because the skeletons were found beside each other, some suspect "Xenosmilus" was  a social mammal. Found alongside the two skeletons were dozens of peccary bones. It seems likely, with their muscular builds, that "X. hodsonae" preyed upon peccaries. It has also been theorized by some to have hunted via a "bite and retreat" strategy using its teeth to inflict deep wounds because of the way its canines and incisors could operate as a unit during a bite, leading to "Xenosmilus" bearing the occasional moniker of ""cookie-cutter cat"". Physically, the cat measured between long with a highly muscular body and probably weighed around , making it similar in size to the fellow machairodonts  Machairodus horribilis and "Amphimachiarodus kabir". Only "Smilodon populator" was noticeably larger amongst the saber-toothed cats. Before their discovery, all known saber-toothed cats fell into two general categories. Dirk toothed cats had long upper canines and stout legs. Scimitar toothed cats had only mildly elongated canines, and long legs. "Xenosmilus" broke these groupings by possessing both stout muscular legs and body, and short broad upper canines. Unlike most other saber-toothed cats, all of "Xenosmilus"'s teeth were serrated, not just its fangs and incisors. The way its top teeth were lined up also allowed "Xenosmilus" to concentrate its  bite force on two teeth at a time.