Early Cretaceous (about 110 million years ago) of Africa. Unlike its relatives, its had an unusual sail on its back like spinosaurus,possibly to attract members of the opposite sex or to regulate its body temperature. It was about 24 feet (8 meters) long and weighed at least 5 ton (2,000 pounds). It lived with Carcharodontosaurus, Suchomimus, Nigersaurus, Elrhazosaurus, Jobaria, and Lurdusaurus in the Elrhaz Foration in Niger (North Africa).
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