Machairodontinae

Machairodontinae (from Ancient Greek μάχαιρα (mákhaira), a type of ancient sword, and ὀδούς (odoús), meaning "tooth") is an extinct subfamily of carnivoran mammals of the cat family Felidae, representing the earliest diverging major branch of the family.

Machairodus (from Ancient Greek μάχαιρα (mákhaira), a type of ancient sword, and ὀδούς (odoús), meaning "tooth") is a genus of large machairodont or saber-toothed cat that lived in Africa and Eurasia during the Middle to Late Miocene, from 12.5 million to 8.7 million years ago. It is the animal from which the subfamily Machairodontinae gets its name. The genus currently consists of four named species: M. alberidae, M. aphanistus, M. laskerevi, and M. robinsoni. The genus is currently usually placed as one of the most basal members of the tribe Homotherini, and the ancestor of later members of

Smilodontini is an extinct tribe within the Machairodontinae or "saber-toothed cat" subfamily of the Felidae. The tribe is also known as the "dirk-toothed cats". They were found in South America, North America, Europe, Asia, and Africa during the Middle Miocene to early Holocene, from 15 mya—8,200 years ago.

Metailurini is an extinct taxonomic tribe of large saber-toothed cats that lived in Africa, Asia, Europe, and North America from the Miocene to the Pleistocene.

Homotherini (Machairodontini) is a tribe (or subtribe) of saber-toothed cats of the family Felidae (true cats). The tribe is commonly known as scimitar-toothed cats. These saber-toothed cats were endemic to North America, Europe, Asia, Africa, and South America from the Miocene to Pleistocene living from c. 12.5 Ma until c. 12,000 years ago. The evolutionary relationship between the tribes Homotherini and Machairodontini cause paleontologists to classify Homotherini either as a subtribe of Machairodontini, or the same tribe often using either name interchangeably.

Tchadailurus is a genus of machairodontine felid from the late Miocene of Chad, Africa.

Miomachairodus is an extinct genus of large machairodontine (saber-toothed cat) containing only a single species, Miomachairodus pseudailuroides. It is mainly known from Middle Miocene-age fossils in Turkey and persisted until the early Late Miocene (Vallesian). Fossils of this machairodont have been found in the Vallesian-age Bahe Formation in Shaanxi, China, and Yeni Eskihisar in Anatolia. This Turkish site is of Miocene age and is well known for its pollen studies.

Hemimachairodus is an extinct genus of machairodontine (sabre-toothed) cat with only one species, Hemimachairodus zwierzyckii, known from only a few fossils from the Pleistocene of Java. Other fossils attributed to Hemimachairodus sp. are known from the Villafranchian (late Pliocene to early Pleistocene) of Tajikistan.