and ornithischian diversity shortly before the Cretaceous–Paleogene boundary mass extinction

Diictodon feliceps es el nombre de una especie extinta de terápsidos

a species of ornithopod dinosaur that inhabited what is now North America during the Jurassic period

Tyrannosaurus rex stood upright on its hind legs and had a long

Parasaurolophus walkeri Scale:1:35 and ornithischian diversity shortly beforeParasaurolophus (P. walkeri `Nearly saurolophus ) is a species of browsing herbivorous hadrosaurid dinosaur that lived during the Campanian and Maastrichtian of the Late Cretaceous period, approximately 76 to 73 million years ago. It is known for its distinctive tube shaped crest, which extends from the back of its skull and curves back over its neck. The body of Parasaurolophus walkeri was around 10 meters long and weighed around 2. 5 tons. It had a