- Order Xenarthra (or Edentata).
- Another group of uniquely South American mammals, the edentates (sloths, armadillos and anteaters), survived the competition with the invaders and are still abundant in South America.
- The edentates, including the sloths, ant-eaters and armadillos, were originally part of a larger group which included aardvarks and pangolins - all had unique extra movable parts between vertebrae in the lower back.
- It became home to a unique zoo of hoofed mammals, edentates, marsupials, and more giant flightless birds (Phorusrachids).
Early 19th century: from Latin edentatus, past participle of edentare 'make toothless', from e- (variant of ex-) 'out' + dens, dent- 'tooth'.
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