Irritator challengeri Gorgosaurus Thylacoleo carnifex was comparable to

Thylacoleo carnifex was comparable to a modern big cat

Olorotitan (O

with an estimated weight between 1

Approximate measurements of the Quetzalcoatlus:

with an estimated weight of around 15 to 20 tons

Irritator challengeri Gorgosaurus Thylacoleo carnifex was comparable toIrritator 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