Arctodus simus (short-faced bear) (Upper Pleistocene, ~20 ka; Cass County, Nebraska, USA) Arctodus simus (Cope, 1879) - short-faced bear humerus from the Pleistocene of Nebraska, USA. (UNSM 26172, Nebraska State Museum of Natural History, Lincoln, Nebraska, USA)
From museum signage: "The Biggest Bear
This is the upper arm bone of a gigantic bear from the Ice Age. Extinct short-faced bears like this were far larger than modern bears. This huge specimen is from the largest individual carnivorous land mammal on record. Its owner had an estimated live weight of well over a ton, more than tiwce as much as the largest living bears. "
Classification: Animalia, Chordata, Vertebrata, Mammalia, Carnivora, Ursidae