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However, a 2006 study argued that the maximum size of Arctodus was ~555 kilograms (1,224 lb), based on the largest known skull. [49] Additionally, a 1998 study calculated the average weight of Arctodus specimens from the La Brea Tar Pits at ~372 kilograms (820 lb), smaller than recovered brown bear remains (~455 kilograms (1,003 lb), although ...
Arctotherium ("bear beast") is an extinct genus of the Pleistocene short-faced bears endemic to Central and South America. [1] Arctotherium migrated from North America to South America during the Great American Interchange, following the formation of the Isthmus of Panama during the late Pliocene.
Few fragmentary specimens, including a partial skull. Smilodon is among the most well-known mammals from the Ice Age, but S. gracilis is far smaller than later species. S. gracilis was described on the basis of a canine from Port Kennedy by Cope in 1880 and was the ancestor to Rancholabrean species.
Tremarctinae appear to have a disproportionately shorter snouts compared with most modern bears, giving them the name "short-faced." This apparent shortness is an illusion caused by the deep snouts and short nasal bones of tremarctine bears compared with ursine bears; Tremarctinae had a deeper but not a shorter face than most living bears. [13]
At least five individuals represented by 20 specimens, which include a palette, vertebrae, ribs and limb bones A giant subspecies of the modern jaguar. The material ranges in age from 11,600 years to 28,000 years old. † Giant short-faced bear [34] [27] † Arctodus simus: At least 30 individuals
Fossilized skull of the Oligocene bone-crushing dog Archaeocyon †Archaeocyon †Archaeocyon leptodus †Archaeohippus †Archaeolagus †Archisyrphus – type locality for genus †Archisyrphus opacus – type locality for species †Arctocyon †Arctocyon ferox; Restoration of an Arctodus, or short-faced bear, with a human to scale †Arctodus
Restoration of an Arctodus, or short-faced bear, with a human to scale †Arctodus †Arctodus simus †Arctostaphylos †Arenahippus †Aristolochia †Armintomys †Armintomys tullbergi †Artocarpus – tentative report †Asarkina; Asio †Asio flammeus; A living Asio otus, or long-eared owl †Asio otus †Asplenium †Astronium †Athyana ...
Fossilized skull of the Miocene-Pliocene false saber-toothed cat Barbourofelis †Barbourofelis †Barbourofelis fricki †Bassaricyonoides – type locality for genus †Bassaricyonoides stewartae – type locality for species; Bassariscus †Bassariscus antiquus †Bensonomys †Bensonomys arizonae – or unidentified comparable form