Amargasaurus was a medium sized sauropod only 33-40 lived in the early and middle Cretaeous period 131-125 million years ago in South America.Amargasaurus had spines on its back like spinosaurus but the spines were not the same spinosaurus had only pair of spines while amargasaurus had two nobody knows what the spines did amargasaurus was only discovered in would have been prey of the giganotosaurus.


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