Iguanodon model, 1990s

Studies show that the weight of Iguanodon's body was counterbalanced by the heavy tail and that it was able to move on two or four legs. They lived between 140 and 110 million years ago

Ankylopollexia Archosaur Archosauria Archosauriformes Archosauromorpha Bipedal Cerapoda Diapsid Diapsida Dinosauria Dinosauromorpha Dryomorpha Euornithopoda Genasauria Hadrosauriformes Iguanodon Iguanodont Iguanodontae Iguanodontia Iguanodontidae Iguanodontoidea Ornithischia Ornithischian Ornithopod Ornithopoda Phanerozoic Reptiles Reptilia

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