durante el período Devónico Tardío

kayetakatae

It also had a slight enlargement at the tip of its snout—called the premaxillary rosette—where larger teeth were concentrated

Su rasgo más llamativo era la forma de su cráneo: ancho y aplanado

Irritator challengeri cretácico durante el período Devónico TardíoIrritator 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