The change was met with resistance, and authors sometimes applied "Mastodon" as an informal name so it became the common term for members of the genus. americanum, the American mastodon, the best known and the last species of Mammut.
Its earliest occurrences date from the early-middle Pliocene (early Blancan stage).
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the valid name is Mammut, a name that preceded Cuvier's description, making Mastodon a junior synonym.
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They disappeared from North America as part of a mass extinction of most of the Pleistocene megafauna, widely presumed to have been related to overexploitation by Clovis hunters, and possibly also to climate change.
The first bones to be collected and studied scientifically were found in 1739 at Big Bone Lick State Park, Kentucky, by French soldiers, who carried them to the Mississippi River, from where they were transported to the National Museum of Natural History in Paris.