Irritator challengeri Scale:1:35 From a paleoecological perspective

From a paleoecological perspective

suggesting a global distribution during its time

Concavenator could have had some form of plumage

Approximate measurements of Psittacosaurus: 1:20 scale - Complete

Approximate measurements of Shastasaurus:

Irritator challengeri Scale:1:35 From a paleoecological perspectiveIrritator 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