Reconstructed skeleton and tail of Spinosaurus aegyptiacus. They then used photogrammetry to digitally capture the anatomy of the tail of Spinosaurus aegyptiacus. However, suggestions that it may have been a truly water-dwelling dinosaur were met with considerable opposition, in large part because the partial skeleton provided little to no evidence of the propulsive structure needed to move such a giant dinosaur through water.Ī research team led by National Geographic Explorer and University of Detroit Mercy paleontologist Nizar Ibrahim to the Kem Kem site where parts of the Spinosaurus aegyptiacus skeleton had first been uncovered in 2008.īetween 20, the researchers recovered many more fossils, including a remarkably complete, fin-like tail capable of extensive lateral movement and characterized by extremely long spines. In a previous study, this creature had been identified as a fish-eating dinosaur with adaptations for an amphibious lifestyle, supported by its relatively short hindlimbs, wide feet, dense bones and elongated jaws studded with conical teeth. Spinosaurus aegyptiacus is a giant theropod dinosaur that lived about 95 million years ago (Cretaceous period) in what is now North Africa. Image credit: Jason Treat / National Geographic Staff / Mesa Schumacher / Davide Bonadonna / Nizar Ibrahim, University of Detroit Mercy. Two Spinosaurus aegyptiacus hunt Onchopristis, a prehistoric sawfish, in the waters of the Kem Kem river system in what is now Morocco.
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