Irritator challengeri Gorgosaurus Tylosaurus had four well-developed fins

Tylosaurus had four well-developed fins that acted as oars for swimming in the sea

que le confería una mordida veloz

en lo que hoy es América del Sur

Thylacoleo carnifex was comparable to a modern big cat

Irritator challengeri Gorgosaurus Tylosaurus had four well-developed finsIrritator challengeri is a genus of spinosaurid theropod dinosaur that lived during the Early Cretaceous Period, approximately 110 million years ago, in what is now Brazil. Its name comes from the Latin "irritator", in reference to the frustration of paleontologists upon discovering that the original fossil had been altered with plaster by the collectors who found it, and "challengeri" in honor of Professor Challenger, a fictional character created by