two medium-sized herbivorous Pachycephalosaurus graze peacefully in a clearing surrounded by vegetation

un área rica en fósiles que ha proporcionado valiosa información sobre la fauna de dinosaurios de esa época

Psittacosaurus sibiricus es una especie extinta de dinosaurio ceratopsiano que vivió durante el período Cretácico temprano

It is believed that this crest had several functions

Amargasaurus cazaui Dreadnoughtus two medium-sized herbivorous Pachycephalosaurus grazeAmargasaurus cazaui is a sauropod dinosaur that lived during the Early Cretaceous period, approximately 129 to 122 million years ago, in what is now South America, specifically in the region of Argentine Patagonia. Discovered in the La Amarga Formation, in the province of Neuqun, and first described in 1991, Amargasaurus is a member of the Dicraeosauridae family, a group of relatively small sauropods with distinctive morphological characteristics.