Dinosaurs, Fossils, Evolution, Paleontology.
are told by Ibrahim et al. To test the propulsive-structure hypothesis, Ibrahim et al. built models of tails of Spinosarus, two other theropods (Coelophysis bauri and Allosaurus fragilis), the crested newt Triturus dobrogicus, the crocodile Crocodylus niloticus, and a rectangular tail for control.