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

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

an adaptation to support their large mass and move on soft ground

Width 69 mm

Amargasaurus cazaui Dreadnoughtus Psittacosaurus sibiricus es una especieAmargasaurus 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.