Snout-tail length 287 mm

Snout-tail length 142 mm

The discovery of more fossils and the advance in analysis techniques have improved the understanding of the biomechanics of Elasmosaurus

although muscular and functional

Dracorex hogwartsia Sphenacodon Snout-tail length 287 mmDracorex hogwartsia was a pachycephalosaurid dinosaur that lived during the Late Cretaceous , approximately 66 million years ago , in what is now North America. Its fossil remains were discovered in the Hell Creek Formation, in South Dakota (United States), and described in 2006. The generic name, Dracorex , means "dragon king", while the epithet hogwartsia is a tribute to the fictional wizarding school in the Harry Potter universe, due to its