and the Two Medicine Formation in Montana

were adapted like flippers

and Africa

Its name "Dryosaurus" means "oak lizard"

Irritator challengeri Scale:1:20 and the Two Medicine FormationIrritator 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