in what is now North America

allowing scientists to get an idea of their external appearance

hace aproximadamente 230 millones de años

the interaction between these two animals goes beyond a simple predator-prey relationship

Ceratosaurus nasicornis Variant:Primed in what is now NorthCeratosaurus (C. nasicornis, "Horned Lizard") is an extinct genus of theropod dinosaur that lived in the Tithonian of the Late Jurassic, approximately 153 and 148 million years ago, one of the last serpentine tailed Ceratosaurids. Ceratosaurus was a bipedal carnivore, quite early in the evolutionary history of theropod dinosaurs. Adult specimens could reach up to six meters in length and weigh close to a ton. Its main features were a horn over its