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

It is believed that this crest had several functions

this small oviraptor

Width 69 mm

a land mass in western North America during the Cretaceous Period

Amargasaurus cazaui Dreadnoughtus an adaptation to support theirAmargasaurus 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.