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Macrochelys
''Macrochelys'' is a genus in the family Chelydridae. It consists of three extant species: ''Macrochelys temminckii'', ''Macrochelys suwanniensis'', and ''Macrochelys apalachicolae''〔Thomas, T, Granatosky, M, Bourque, J, Krysko, K, Moler, P, Gamble, T, Suarez, Leone, E, Enge, K, & Roman, J, 2014. Taxonomic assessment of Alligator Snapping Turtles (Chelydridae: ''Macrochelys''), with the description of two new species from the southeastern United States. Zootaxa 3786 (2): 141–165〕 and the extinct ''M. schmidti'' and ''M. auffenbergi'' (described from the early middle Miocene of Nebraska and the middle Pliocene of Florida, respectively). The genus was considered monospecific until a 2014 study by Travis Thomas divided it into three separate species. ==Fossil history== Unlike the family Chelydridae as a whole, the genus ''Macrochelys'' is exclusively North American. Hutchison (2008) considered genus ''Chelydrops'' to be a junior synonym of ''Macrochelys'', and recombined its type species, ''Chelydrops stricta'' from the Miocene (early Barstovian) of Nebraska, as the (then) fourth species of ''Macrochelys''.
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