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paleoart · 1 year
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Machairodus, Dinofelis, Megantereon
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paleostock · 2 years
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Megantereon
Megantereon, a species of saber-toothed cat, ambushes a European hyena at a carcass.
https://paleostock.com/resources/megantereon-stock-photo
Illustration by Simone Zoccante
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mirtadraws · 9 months
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Megantereon (with completely fictional colours).
I think it's pretty obvious that it's largely based on reconstructions by Mauricio Anton
I spent entirely too long fine-tuning the colours, only to conclude that I ought to calibrate my laptop screen. Apparently one needs some kind of expensive screen calibration gadget for that, hm
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kitsumeo · 1 year
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Febroary day 11 - Overgrown fangs Decided to draw some Megantereon-sabre toothed cats. I really like how these turned out! What do you think? Please leave a like if you enjoy my illustrations! It helps my art reach more people ♡
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antiqueanimals · 2 years
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The Ice Age, Björn Kurtén, 1972. Illustrated by Margaret Lambert.
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quick doodle of pseudo-melanism in a megantereon nihowanensis.
these lesser-known true sabertoothed cats are thought to be the only arboreally mobile genus within the taxon. they are known for their exceptionally large forearms relative to body size and their mandibular phalange, a trait not seen often in true sabertoothed cats. megantereon is also thought to possibly be an ancestor to the more derived smilodon genus. the reference photo i used was of a leopard, with cranial anatomy edited to more accurately resemble the megantereon taxon.
thanks @b0chelly for the suggestion!
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six-legged-sea-leopard · 10 months
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a megantereon for you
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vickysaurus · 1 year
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antichapel · 2 years
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cw eye strain
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strigops · 1 year
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i will likely never draw the rest of my “tlt but they’re all cats” au (or it will just take me forever), but here’s a quick lion!gideon from a while ago. decided all the lyctors are pleistocene big cats, so she’s a fuck off huge cave lion (john)/asiatic lion (wake) hybrid.
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pleistocene-pride · 6 months
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Happy Ice Age Week: Homotherium is an extinct genus of machairodontine scimitar-toothed cat that inhabited North America, South America, Eurasia, and Africa from the Pliocene to the Pleistocene epochs around 4 million to 12,000 years ago. Making them to be one of the most widespread of all felines throughout time second only to the domestic cat. The first fossils known to belong to homotherium consisting of a partial skeleton were described in 1846 by Richard Owen as the species Machairodus latidens. It wouldn’t be until 1890 after several addition specimens where recovered that one Emilio Fabrini would determine them to be a distinct genus which he dubbed Homotherium for the Greek homos meaning same and therion meaning beast. Over the next century and a half hundreds of specimens have been recovered representing over a dozen species including: H aethiopicum,‭ ‬H crenatidens,‭ ‬H crusafonti,‭ ‬H hadarensis,‭ ‬H idahoensis,‭ ‬H ischyrus,‭ ‬H johnstoni,‭ ‬H latidens,‭ ‬H nestianus,‭ ‬H nihowanensis,‭ ‬H sainzelli,‭ ‬H serum,‭ ‬H ultimum,‭ ‬and H venezuelensis. Reaching on average 3.5ft (1.1m) tall at the shoulder and 425lbs (190kg) in weight, homotherium was around the size of a male African lion. Homotherium had shorter upper canines than other machariodonts such as Smilodon or Megantereon, but these were still longer than those of extant cats. The incisors and lower canines of Homotherium formed a powerful puncturing and gripping device, and its jaws were adapted to clamp and hold prey while inflicting damage with the canine teeth. Homotherium is notable for its unusual shape and proportions, with a comparatively compact torso and long legs. They had thick necks, large shoulders, and a sloped back giving them a profile more akin to a hyena than other big cats. These adaptations mean that Homotherium was built for energy efficient travel,‭ ‬and may have used this advantage to wear prey down in a manner similar to how wolves will constantly harass a prey animal until it collapses from exhaustion. This anatomy coupled with findings of multiple homotherium individuals found to have died together, points to Homotherium being a well adapted diurnal social pursuit/ persistence predator.
Art utilized was made by the following creators
Scimitar Toothed Cat: Michael Westbury https://www.eurekalert.org/multimedia/583429
Homotherium: allotyrannosaurus https://www.deviantart.com/allotyrannosaurus/art/White-Homotherium-909661018
Homotherium: Mauricio Anton
Homotherium: Julio Lacerda https://paleoart.tumblr.com/post/629421596985196544/commission-for-a-client-homotherium-latidens-and
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paleoart · 1 year
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Megantereon
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newlabdakos · 6 months
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Smilodon
(temporal range: 2.5-0.01 mio. years ago)
[text from the Wikipedia article, see also link above]
Smilodon is a genus of the extinct machairodont subfamily of the felids. It is one of the best known saber-toothed predators and one of the most famous prehistoric mammals. Although commonly known as the saber-toothed tiger, it was not closely related to the tiger or other modern cats. Smilodon lived in the Americas during the Pleistocene epoch (2.5 mya – 10,000 years ago). The genus was named in 1842 based on fossils from Brazil; the generic name means "scalpel" or "two-edged knife" combined with "tooth". Three species are recognized today: S. gracilis, S. fatalis, and S. populator. The two latter species were probably descended from S. gracilis, which itself probably evolved from Megantereon. The hundreds of specimens obtained from the La Brea Tar Pits in Los Angeles constitute the largest collection of Smilodon fossils.
Overall, Smilodon was more robustly built than any extant cat, with particularly well-developed forelimbs and exceptionally long upper canine teeth. Its jaw had a bigger gape than that of modern cats, and its upper canines were slender and fragile, being adapted for precision killing. S. gracilis was the smallest species at 55 to 100 kg (120 to 220 lb) in weight. S. fatalis had a weight of 160 to 280 kg (350 to 620 lb) and height of 100 cm (39 in). Both of these species are mainly known from North America, but remains from South America have also been attributed to them. S. populator from South America was the largest species, at 220 to 436 kg (485 to 961 lb) in weight and 120 cm (47 in) in height, and was among the largest known felids. The coat pattern of Smilodon is unknown, but it has been artistically restored with plain or spotted patterns.
In North America, Smilodon hunted large herbivores such as bison and camels, and it remained successful even when encountering new prey species in South America. Smilodon is thought to have killed its prey by holding it still with its forelimbs and biting it, but it is unclear in what manner the bite itself was delivered. Scientists debate whether Smilodon had a social or a solitary lifestyle; analysis of modern predator behavior as well as of Smilodon's fossil remains could be construed to lend support to either view. Smilodon probably lived in closed habitats such as forests and bush, which would have provided cover for ambushing prey. Smilodon died out at the same time that most North and South American megafauna disappeared, about 10,000 years ago. Its reliance on large animals has been proposed as the cause of its extinction, along with climate change and competition with other species, but the exact cause is unknown.
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mirtadraws · 1 year
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My hasty and inexpert attempts at reconstructing Megantereon. One day I will know what I am doing!! But until that day, don't take me too seriously.
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marsalta-alt · 11 months
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Shortened version of whats below:
TL;DR: name of species: Machairodontinae its a saber tooth cat idk how to describe it but ye
Longer version:
The Machairodontinae contain many of the extinct predators commonly known as "saber-toothed cats", including the famed genus Smilodon, as well as other cats with only minor increases in the size and length of their maxillary canines. The name means "dagger-tooth", from Greek μάχαιρα (machaira), sword. Sometimes, other carnivorous mammals with elongated teeth are also called saber-toothed cats, although they do not belong to the felids. Besides the machairodonts, other saber-toothed predators also arose in the nimravids, barbourofelids, machaeroidines, hyaenodonts and even in two groups of metatherians (the thylacosmilid sparassodonts and the deltatheroideans).
The Machairodontinae originated in the early or middle Miocene of Africa.[citation needed] The early felid Pseudaelurus quadridentatus showed a trend towards elongated upper canines, and is believed to be at the base of the machairodontine evolution. The earliest known machairodont genus is the middle Miocene Miomachairodus from Africa and Turkey. Until the late Miocene, machairodontines co-existed at several places together with barbourofelids, archaic large carnivores that also bore long sabre-teeth. Traditionally, three different tribes of machairodontines were recognized, the Smilodontini with typical dirk-toothed forms, such as Megantereon and Smilodon, the Machairodontini or Homotherini with scimitar-toothed cats, such as Machairodus or Homotherium, and the Metailurini, containing genera such as Dinofelis and Metailurus. However, some have recently regrouped the Metailurini within the other felid subfamily, the Felinae, along with all modern cats. The last machairodontine genera, Smilodon and Homotherium, did not disappear until late in the Pleistocene, roughly 10,000 years ago in the Americas.Based on mitochondrial DNA sequences extracted from fossils, the lineages of Homotherium and Smilodon are estimated to have diverged about 18 Ma ago. The name 'saber-toothed tigers' is misleading. Machairodonts were not in the same subfamily as tigers, there is no evidence that they had tiger-like coat patterns, and this broad group of animals did not all live or hunt in the same manner as the modern tiger. DNA analysis published in 2005 confirmed and clarified cladistic analysis in showing that the Machairodontinae diverged early from the ancestors of modern cats and are not closely related to any living feline species. Saber-tooths also coexisted in many places with conical-toothed cats. In Africa and Eurasia, sabertooth cats competed with several pantherines and cheetahs until the early or middle Pleistocene. Homotherium survived in northern Europe even until the late Pleistocene. In the Americas, they coexisted with the cougar, American lion, American cheetah, and jaguar until the late Pleistocene. Saber-toothed and conical-toothed cats competed with each other for food resources, until the last of the former became extinct. All recent felids have more or less conical-shaped upper canines.
The jaws of machairodonts, especially more derived species with longer canines, such as Smilodon and Megantereon, are unusually weak. Digital reconstructions of the skulls of lions and of Smilodon show that the latter would have fared poorly with the stresses of holding onto struggling prey. The main issue was the stresses suffered by the mandible: a strong force threatened to break the jaw as pressure was placed on its weakest points.Smilodon would have had one-third the bite force of a lion, had it used only its jaw muscles. However, the neck muscles that connected to the back of the skull were stronger and depressed the head, forcing the skull down. When the jaw was hyper-extended, the jaw muscles could not contract, but the neck muscles pressed the head down, forcing the canines into whatever resisted them. When the mouth was closed far enough, the jaw muscles could raise the mandible by some margin.
On occasion, the bone of a fossilised predator is preserved well enough to retain recognizable proteins that belong to the species it consumed when alive. Stable isotope analysis of these proteins has shown that Smilodon preyed mainly on bison and horses, and occasionally ground sloths and mammoths, while Homotherium often preyed on young mammoths and other grazers such as pronghorn antelope and bighorn sheep when mammoths were not available. Examinations published in 2022 of tooth wear patterns on Smilodon and bite marks on the bones of the peccary Platygonus by Xenosmilus suggest that machairodonts were capable of efficiently stripping and de-fleshing a carcass of meat when feeding. They also show a degree of bone consumption on par with that of modern lions, which themselves can and regularly do eat smaller bones when consuming a meal
behind the carnassials. Regardless, reconstructions of Smilodon, Machairodus, and other species are shown with long lips, often resembling the jowls of large dogs.Studies of Homotherium and Smilodon published in 2022 by Mauricio Anton et al., suggest that scimitar-toothed machairodonts like Homotherium itself possessed upper lips and gum tissue that could effectively hide and protect their upper canines; a trait they shared in common with modern cat species, while Smilodon had canines that remained partially exposed and protruded past the lips and chin even while the mouth was closed due to their great length.
Comparisons of the hyoid bones of Smilodon and lions show that the former, and possibly other machairodonts, could potentially have roared like their modern relatives.
A 2009 study compared the ratios of social and solitary carnivores in reserves in South Africa and Tanzania with those of fossils of California's La Brea tar pits, a well-known fossil bed from the Pleistocene, and how they responded to recorded sounds of dying prey, to infer whether Smilodon was social or not. At one time, the La Brea tar pits consisted of deep tar in which animals became trapped. As they died, their calls attracted predators, which in turn also became caught. It is considered the best Pleistocene fossil bed in North America for the number of animals caught and preserved in the tar, and may be similar to the situation created in the study. The assumption was that solitary carnivores would not approach the sources of such sounds, because of the danger of confrontation with other predators. Social carnivores, such as lions, have few other predators to fear, and will readily attend these calls. The study concluded that this latter situation most closely fit the ratio of animals found at the La Brea tar pits, and therefore that Smilodon was most likely social.
These cats were tenacious and adaptable animals, thriving for hundreds of thousands of years before their time finally came to an end. Saber-toothed cats went extinct between 8,000 and 10,000 years ago, as the ice age drew to an end and their prey began to die out.
many of the extinct predators commonly known as "saber-toothed cats", including the famed genus Smilodon, as well as other cats with only minor increases in the size and length of their maxillary canines. The name means "dagger-tooth", from Greek μάχαιρα (machaira), sword. Sometimes, other carnivorous mammals with elongated teeth are also called saber-toothed cats, although they do not belong to the felids. Besides the machairodonts, other saber-toothed predators also arose in the nimravids, barbourofelids, machaeroidines, hyaenodonts and even in two groups of metatherians (the thylacosmilid sparassodonts and the deltatheroideans).
No pictures for you I'll send you some If you GO TO BED MY GOD MARS SLEEP
I. Caant readd rjoght bow💥💥💥💥💥💥💥💥
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sabertooth-showdown · 11 months
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WELCOME TO THE SABERTOOTH SHOWDOWN.
Saber-toothed (adjective): having long, sharp canine teeth
Admittedly, this is a fairly niche topic, so before actually constructing the bracket and releasing the matchups, I think it’s important to give a background for each taxon. That way, everyone will have at least a little bit of information to base their votes on!
The competitors will be organized at the genus rank, as many are extinct and there simply isn’t a whole lot we can infer about the variation between some species from only their fossils.
Each competitor will have a dedicated post including their overall ecological success, as well as my personal opinion of how they would rank in a tier list format. If you disagree with any of my arguments, please feel free to voice your opinion, as well as argue for the placement you feel is most appropriate for each competitor.
I will tag each background/rank post by the competitor’s genus, family, and class.
CURRENT COMPETITORS
There are currently 22 genera included in the tournament. Organized by family, they are as follows:
Felidae: Homotherium, Megantereon, Xenosmilus, Machairodus, Smilodon, Neofelis, Dinofelis
Nimravidae: Nimravus, Hoplophoneus, Dinictis, Quercylurus
Barbourofelidae: Barbourofelis
Oxyaenidae: Machaeroides
Thylacosmilidae: Thylacosmilus
Gorgonopsidae: Inostrancevia, Lycaenops
Lystrosauridae: Lystrosaurus
Anomocephaloidae: Tiarajudens
Stahleckeriidae: Lisowicia
Cervidae: Hydropotes
Cercopithecidae: Papio
Uintatheriidae: Uintatherium
If you have a genus in mind that you think should be included, please submit it, as well as your personal appraisal of their rank!
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