An alligator is a large reptile in the Crocodilia order in the genus Alligator of the family Alligatoridae. The two extant species are the American alligator (A. mississippiensis) and the Chinese alligator (A. sinensis). Additionally, several extinct species of alligator are known from fossil remains. Alligators first appeared during the Oligocene epoch about 37 million years ago.The name alligator is probably an anglicized form of el lagarto, the Spanish term for the lizard, which early Spanish explorers and settlers in Florida called the alligator.[2] Later English spellings of the name included allagarta and alagarto.

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