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

Scale 1:20 - 115 mm

Scale 1:35 - 265 x 85 x 113 mm H

its bones indicate that it was a growing animal when it died

This mix of characteristics has led to some controversies in its classification and has sparked debates about whether it should really be considered a dinosaur

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