These trends would be taken further in Homotherium, which is thought to have evolved from Machairodus.

But given the fluctuation range of the size of modern large cats, it is highly probable that all belong to just one species, Homotherium latidens.

One of the most famous sites of Homotherium remains is Friesenhahn cave in Texas, where 30 Homotherium skeletons were found, along with hundreds of juvenile mammoths and several dire wolves.

Besides mammoth, very few other potential prey species were found in the cave-it is therefore unlikely that Homotherium carried scavenged carcasses of already dead animals to the cave.

In this film, the Homotherium is named Lenny and only appeared in the first of the Ice Age films.

A number of large animals including mammoths and mastodons, saber-toothed cats like Smilodon and Homotherium, and giant sloths disappeared in the late Pleistocene and early Holocene — especially in North America, where animals that survived elsewhere ( including horses and camels ) became extinct.

* North America: Dire Wolf, Smilodon, Giant Beaver, Ground Sloth, Giant Imperial Mammoth ( Mammuthus imperator ), Jeffersonian Mammoth ( Mammuthus jeffersonii ), Columbian Mammoth ( Mammuthus columbi ), Woolly Mammoth, Mastodons, Giant Short-Faced Bear, American Cheetah, Scimitar Cats ( Homotherium ), American Camels, American Horses, and American Lions all become extinct.

Pleistocene fauna in the Americas included giant sloths ; short faced bears ; several species of tapirs ; peccaries ( Including the long nosed and flat-headed peccaries ); the American lion ; giant condors ; Miracinonyx (" American cheetahs ", not true cheetahs ); saber-toothed cats like Xenosmilus, Smilodon and the scimitar cat, Homotherium ; dire wolves ; saiga ; camelids such as two species of now extinct llamas and Camelops ; at least two species of bison ; stag-moose ; the shrub-ox and Harlan's muskox ; horses ; mammoths and mastodons ; and giant beavers as well as birds like teratorns and Titanis and giant tortoises.

* Scimitar cat ( Homotherium serum ), an extinct species of the cat family

The last machairodontine genera Smilodon and Homotherium did not disappear until late in the Pleistocene, roughly 10. 000 years ago in the Americas.

In the southern parts of its range the American Homotherium co-existed with Smilodon ; in the northern parts it was the only species of saber-toothed cat.

Traditionally three different tribes of machairodontines were recognized, the Smilodontini with typical dirk-toothed forms like Megantereon and Smilodon, the Machairodontini or Homotherini with scimitar-toothed cats like Machairodus or Homotherium and the Metailurini, containing generea like Dinofelis and Metailurus.

Homotherium survived in Eurasia and North America until about 30 000 and 10 000 years ago, respectively.

In North America, a very similar species, Homotherium serum occurred from the latest Pliocene until the latest Pleistocene.

In North America fossil remains of Homotherium are less abundant than those of its contemporary Smilodon.

The decline of Homotherium could be due to the disappearance of large herbivorous mammals like mammoths in America at the end of the Pleistocene.

Homotherium has appeared in Prehistoric America when it was trying to catch an American Mastodon and it also appeared in Monsters we Met.

Homotherium survived in Northern Europe even until the late Pleistocene.

Two species described form the early Pleistocene of Africa are Homotherium ethiopicum and Homotherium hadarensis.

Homotherium probably derived from Machairodus and appeared for the first time at the Miocene-Pliocene border, about 5 million years ago.

The molars of Homotherium were rather weak and not adapted for bone crushing.

The group includes the genera Smilodon, Machairodus and Homotherium.

The canines were long, thin and flattened from side to side but broad from front to back like the blade of a knife, as in Homotherium.

Homotherium serum life-restoration.

Homotherium serum.

Homotherium reached at the shoulder and weighed an estimated was therefore about the size of a male African lion.

Compared to some other machairodonts, like Smilodon or Megantereon, Homotherium had relatively shorter upper canines, but they were flat, serrated and longer than those of any living cat.

The limb proportions of Homotherium gave it a hyena-like appearance.

These remains form the holotype of Homotherium venezuelensis.

The American Homotherium was originally described by the name Dinobastis.

The worldwide association of Homotherium species with proboscidean ( elephant and mastodon ) and rhinoceros remains, mainly those of juveniles, suggests that Homotherium preyed selectively on these tough-skinned animals and probably hunted in packs, carrying away the large animals it brought down.

According to the fossil record, Lissamphibia, which includes all modern amphibians and is the only surviving lineage, may have branched off from the extinct groups Temnospondyli and Lepospondyli at some period between the Late Carboniferous and the Early Triassic.

The phylogeny of Paleozoic amphibians is uncertain, and Lissamphibia may possibly fall within extinct groups like the Temnospondyli ( traditionally placed in the subclass Labyrinthodontia ), and the Lepospondyli, and in some analysis even the amniotes.

The Lissamphibia, superorder Salientia, are traditionally divided into three orders, but an extinct salamander-like family, the Albanerpetontidae, is now considered part of the Lissamphibia alongside the superorder Salientia.

The Anatolian plateau is interspersed with extinct volcanoes, the tallest of which is Mt.

Most notable for this use is the extinct giant fennel, silphium.

The plateau is masked by intermediate mountain ranges and extinct volcanoes.

It is predicted that abalones will become extinct in the wild within 200 years at current rates of carbon dioxide production.

The extinct medullosans produced a third type of resin, which is often found as amber within their veins.

Resin from the extinct species Hymenaea protera is the source of Dominican amber and probably of most amber found in the tropics.

This means that species are more likely to become population threatened, endangered, and even extinct, when and where abiotic stress is especially harsh.

The aurochs ( or ; also urus, ( Bos primigenius ), the ancestor of domestic cattle, is an extinct type of large wild cattle that inhabited Europe, Asia and North Africa ; they survived in Europe until the last recorded aurochs, a female, died in the Jaktorów Forest, Poland in 1627.

Amblypoda is a taxonomic hypothesis uniting a group of extinct, herbivorous mammals.

* In the very south of the city, on the border with Wachtberg and Rhineland-Palatinate, is an extinct volcano the Rodderberg

Bernard G. Campbellin wrote: " That Gigantopithecus is in fact extinct has been questioned by those who believe it survives as the Yeti of the Himalayas and the Sasquatch of the north-west American coast.

Some extinct members of the crocodilian line, a sister group to the dinosaurs and birds, also evolved bipedal forms-a crocodile relative from the triassic, Effigia okeeffeae, is believed to be bipedal.

The group is usually divided into two sub-groups: Western Baltic, containing only extinct languages, and Eastern Baltic, containing both extinct and the two living languages in the group: Lithuanian ( including both Standard Lithuanian and Samogitian ) and Latvian ( including both literary Latvian and Latgalian ).

It is almost extinct, as it was replaced with the C language.

Another suggestion is that the bunyip may be a cultural memory of extinct Australian marsupials such as the Diprotodon or Palorchestes.

1 subspecies is extinct:

The giant skink ( Macroscincus coctei ) is now thought to be extinct.

For example, it is thought that ammonites were the principal food of mosasaurs, a group of giant marine reptiles that became extinct at the boundary .< ref name =" Kauffman ">

Non-avian dinosaur fossils are found only below the K – T boundary, indicating that they became extinct during the boundary event .< ref > A very small number of dinosaur fossils have been found above the K – T boundary, but they have been explained as reworked fossils, that is, fossils that have been eroded from their original locations then preserved in later sedimentary layers.

For example, it is thought that ammonites were the principal food of mosasaurs, a group of giant marine reptiles that became extinct at the boundary .< ref name =" Kauffman ">