is an extinct bear genus that inhabited North America during the Pleistocene epoch from about 1.8 Mya until 11,000 years ago. It was assigned to Tremarctinae by Krause et al. “We had an Africa here,” Schubert said, and “it’s gone now.”, “Ancient Bear DNA Mapped—A First for Extinct Species.”. Today, only the spectacled bear carries on the legacy of the family which once included Arctotherium, Arctodus, and their kin – a modest relative of some of the biggest bears of all time. But it's hard to imagine the average megafauna mammal (or early human) worrying whether it was about to be eaten by a 2,000- or … Family: Ursidae. Its omnivorous diet and size all matched Arctotherium much more than it did IRL!Arctodus, which has a much leaner build and was more carnivorous. Stephen Wroe through the use of finite element analysis concludes that … Archeologists estimate most giant short-faced bears, including females, to weigh 1600 to 1900 pounds. Its skull and shearing type of teeth indicate a highly carnivorous way of life. Subtracting 42 inches from the center of the shoulder blade to the tip of the nose, this bear could reach 30 inches above his up-stretched nose—to at least 14½ feet. Figure 1. It likely came to South America from North America during the Great American Interchange. I haven't read that article, but if the midshaft measurements included these pathologies (note that the left humerus was wider; 9.3 vs 9.1 cm in AP diameter, and 9.0 vs 8.4 cm in ML diameter) they may exaggerate the size of this animal, especially in comparison to these largest Arctodus simus specimens with even longer … The South American genus, Arctotherium, was the closest relative to Arctodus and it had similar short-faced adaptions and reached similar or greater sizes. Credit – North American Bear Center – https://www.bear.org. It was the most common of early North American bears, being most abundant in California. The type specimen came from Potter Creek Cave in Shasta County, California. Giant bears once dominated the mega-fauna. Andrewsarchus may have been bigger overall, but without a body or better defined relationships to relatives we don’t know. An Arctotherium skeleton that was found in Argentina in 1935 was reexamined in 2011. Arctotherium - a giant bear - roughly 3000 pounds. It lived in the mountains and woodlands of Northern America and originated in the USA before spreading into Canada. Ursus maritimus tyrannus – giant brown bear – roughly 2500 pounds. A prehistoric South American giant short-faced bear tipped the scales at up to 3,500 pounds. Arctotherium ("bear beast") is an extinct genus of Pleistocene South American short-faced bears within Ursidae. The Arctotherium angustidens specimen of concern is not … Arctotherium is composed of 5 South American species - of which A. angustidens is the earliest, largest, and apparently most predatory - and is the sister clade of Arctodus; the two are in turn part of the clade Tremarctinae which further includes Tremarctos (spectacled bear and kin) and Plionarctos (Soibelzon and Schubert 2011). Arctodus simus first appeared during the middle Pleistocene in North America, about 800,000 years ago, ranging from Alaska to Mississippi, and it became extinct about 11,600 years ago. The bear skeleton, found in Buenos Aires Province, Argentina, in 1935, was recently reexamined by Schubert and study co-author Leopoldo Soibelzon, a paleontologist from Argentina who specializes in South American fossil bears. Arctodus simus may have once been Earth's largest mammalian, terrestrial carnivore. Simus probably reached a max weight of about 2500 lbs. They ranged from Alaska and the Yukon to Mexico, and from Pacific to Atlantic coasts. Tests of bone samples show a very high ratio of nitrogen-15 to nitrogen-14, a nitrogen “signature” that indicates a true carnivore. Members of the American genera Arctodus and Arctotherium occupied extreme positive RW2 scores in the cranial view because of their expanded medial epicondyle, although in caudal view they overlapped with Ursus species (Fig. Arctotherium is an extinct genus of South American short-faced bears within Ursidae of the late Pliocene through the end of the Pleistocene. Everything considered, paleobiologists conclude that the giant short-faced bear ate only meat. And the short-faced bear’s reign in North America would have also coincided with an explosion in Ice Age megafauna, such as giant ground sloths, camels, and mammoths—all potential new food sources. Return Policy Privacy Policy, Unfortunately, your shopping cart is empty:(, the cost of the image depends on its size, you may use several options to pay for the image, such as credit cards (Visa, MasterCard and Maestro) or Bank transfer (wire transfer). This bear is distinguished from the lesser short-faced bear (Arctodus pristinus) by larger size; bigger, broader, more crowded teeth; a shorter face and relatively longer legs. The species described are all thought to have been larger than any living species of bear. Today, only the spectacled bear carries on the legacy of the family which once included Arctotherium, Arctodus, and their kin – a modest relative of some of the biggest bears of all time. Tremarctos floridanus was a contemporary. Ursus maritimus tyrannus – giant brown bear – roughly 2500 pounds. Their closest relatives were the North American short-faced bears of genus Arctodus (A. pristinus and A. simus). (Related: “Ancient Bear DNA Mapped—A First for Extinct Species.”). In short, the polar bear is smaller. Image from Dantheman9758 on the Wikimedia Commons. Short Faced Bear V This large male specimen probably weighed close to a ton. A typical representative: Arctotherium angustidens Gervais and Ameghino, 1880. Of the two North American short-faced bears, the giant short-faced bear (Arctodus simus) was the largest (Figure 1) the biggest known skull being from the Yukon. Their closest relatives were the North American short-faced bears of genus Arctodus Its eye sockets are set wide apart and face forward, giving it excellent vision. Arctotherium was also one of the biggest bears that ever lived. Deinosuchus or Sarcosuchus would be too much for even the biggest bear ever. In North America, the short-faced bear’s increasing size may have offered an advantage—its sheer heft may have scared off saber-toothed cats and other predators from their kills, the researchers speculate. This smaller bear with its longer face and smaller teeth may have been more omnivorous. Arctotherium angustodens – South American short-faced bear – roughly 3000 pounds. All rights reserved. so dont be a sissy. Arctotherium - a giant bear - roughly 3000 pounds. Order: Carnivora. and you dont have to know anything just choose one or the other. Kmw New Member. While some researchers are now projecting an earlier date, the Clovis People have long been regarded as the first North Americans. Their closest relatives were the North American short-faced bears of genus Arctodus (A. pristinus and A. simus). It lived in the mountains and woodlands of Northern America and originated in the USA before spreading into Canada. Arctodus Simus Compared To A Human (Author: Dantheman9758 cc by-s.a. 3.0) This is one prehistoric bear species that was large enough to possibly rival Arctotherium Angustidens. Like the grizzly, he may have been a part-time hunter and just about a full-time scavenger. Arctodus Simus vs Humans. The short faced bear (Arctodus spp.) There is no room for anyone’s opinion on this, because the size of these animals is well known. 2008. The species described are all thought to have been larger than any living species of bear. They probably scavenged and preyed upon large herbivores such as bison, muskoxen, deer, caribou, horses, and ground sloths. The giant short-faced bear (Arctodus simus) This is just an average-sized short-faced bear. American black bears Ursus amercanus brown bears Ursus arctos and polar bears Ursus maritimus all have mating seasons occurring within Am The Giant Short-Faced Bear: Arctodus Simus. The large width of the jaws in relation to their shortness, plus the huge insertions for biting muscles, gave this bear a vise-like killing bite and the ability to crush bones to obtain marrow. Arctotherium was named by Hermann Burmeister in 1879. 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