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(now Maraapunisaurus) may have come from an animal 58 m long; its vertebral column would have been substantially longer than that of the blue whale. However, research published in 2015 speculated that the size estimates of A. fragillimus may have been highly exaggerated. The longest dinosaur known from reasonable fossils material is probably Argentinosaurus huinculensis with length estimates of 35 to 36 m according to the most recent researches. However the giant Barosaurus

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