Short-faced bears belong to the Tremarctinae subfamily of bears. There is one living representative, the spectacled bear ("Tremarctos ornatus") of South America. Extinct members include "Arctodus, Arctotherium", "Plionarctos" and the Florida spectacled bear ("Tremarctos floridanus"). Of these, the giant short-faced bears ("Arctodus simus" and "Arctotherium angustidens") may have been the largest ever predators in the Americas.