often called the "sagittal crest

specifically in what is now North America

Their streamlined bodies

Tethyshadros insularis would have had a bulky body with robust legs

Megalosaurus bucklandii es uno de los dinosaurios terópodos más antiguos y conocidos que vivió durante el período Jurásico

Therizinosaurus cheloniformis mesozoico often called the "sagittal crestTherizinosaurus (T. cheloniformis `Scythe Lizard) is a genus of theropod dinosaur that lived in the Campanian of the Late Cretaceous, approximately 70 75 million years ago, in what is now Asia. It was characterized for being a large and herbivorous animal, with long legs and a long, thin neck that allowed it to reach leaves and branches of tall trees. Therizinosaurus was a very large animal, with a total length of up to 10 meters and a height of