Irritator challengeri Variant:Hand painted with an estimated length of

with an estimated length of around 4 to 5 meters and a weight of around 1 ton

including amplifying sound for communication

que vivió durante el Cretácico tardío

and floodplains in what is now southern Germany

Irritator challengeri Variant:Hand painted with an estimated length ofIrritator 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