Duckbill Gallery

Styracosaurus Illustration

Styracosaurus
Horned dinosaurs (ceratopsians) evolved in Asia 160 million years ago, then colonised North America about 110 million years ago and Europe by 85 million years ago. The first ceratopsians were small, walked on two legs (bipedal) and lacked the large frill and facial horns of later species. Towards the end of the Cretaceous Period, gigantic species evolved and were among the most common dinosaurs in Laramidia, a huge island that formed when the rising sea level divided North America into several continental islands. 75 million years ago, the eastern coastal plain of Laramidia supported the highest diversity of giant herbivores recorded anywhere. Several ceratopsians, including Styracosaurus, co-existed there with numerous species of duckbill dinosaurs, ankylosaurs and other large ornithischians

© WA Museum

Various dinosaurs of the Hell Creek Formation

Various dinosaurs of the Hell Creek Formation. Hell Creek Formation is a geologic formation spanning Montana, Wyoming, North Dakota and South Dakota. It dates from the end of the Cretaceous into the early Paleogene. It was a time about 68-66 million years ago. Denizens of this time and place included the ceratopsian; Torosaurus, the hadrosaur; Edmontosaurus, and Tyrannosaurus Rex. An early mammal and possible proto-primate of the time was Purgatorius. It was smaller than a squirrel

© Arthur Dorety/Stocktrek Images

A T-Rex plans his attack on a herd of Parasaurolophus dinosaurs

A Tyrannosaurus Rex comes across a herd of Parasaurolophus duck-billed dinosaurs grazing. The T-Rex carefully plans his attack by picking a target and making a move

© Mark Stevenson/Stocktrek Images

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