Aunque no era un dinosaurio de gran tamaño

Longitud hocico-cola 250 mm

The species D

designed to withstand the force of powerful muscles that propelled a crescent-shaped tail

and the Two Medicine Formation in Montana

Irritator challengeri Scale:1:20 Aunque no era un dinosaurioIrritator 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