Due to its large size and powerful jaw

su estructura corporal era más primitiva

El hábitat de Spinosaurus fue principalmente los sistemas fluviales y deltaicos de la región del norte de África en lo que hoy es Marruecos

shoots and branches of trees and shrubs

Este dinosaurio vivió en lo que ahora es China y se han encontrado fósiles en la Formación Lower Shaximiao de la provincia de Sichuan

Pachyrhinosaurus Paleozoico superior Due to its large sizePachyrhinosaurus is an extinct genus of ceratopsian dinosaur that lived during the late Cretaceous period, approximately 72 to 67 million years ago. Its name means "thick nosed lizard", which refers to the distinctive feature of this species. Pachyrhinosaurus was characterized by having a large, robust skull with a thick nose and enlarged nasal organs, which formed bony structures called "antlers" at the front of the skull. These antlers varied in