Great American Interchange
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The Great American Biotic Interchange, also known as the Great American Interchange and the Great American Faunal Interchange, was an important late Cenozoic paleozoogeographic biotic interchange even
†Thylacosmilus, a sparassodont
The monito del monte, Dromiciops gliroides, South America's only australidelphian marsupial
†Astrapotherium magnum
The giant anteater, Myrmecophaga tridactyla, the largest living descendant of South America's early Cenozoic mammalian fauna
Arctodus
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Arctodus is an extinct genus of short-faced bears that inhabited North America during the Pleistocene. The two recognized species are the lesser short-faced bear and the giant short-faced bear. Of the
Partial mandible of A. pristinus uncovered from Port Kennedy Cave
Restoration of A. simus
A. simus skeletal at the Field Museum of Natural History, Chicago