Mamenchisaurus occupied the niche of a large

The ornamental cranial structures—especially the nasal horn and the frill spines—would have had multiple functions

highly vascularized bony crest

These findings are important because they change our perception of what the head of Tyrannosaurus rex looked like and how it fed

making it one of the first known non-avian dinosaurs with evidence of plumage on the limbs of both legs and wings

Podokesaurus holyokensis Cryodrakon Mamenchisaurus occupied the niche ofPodokesaurus holyokensis was a small theropod dinosaur from the Early Jurassic, dating back approximately 190 million years, whose remains come from the Portland Formation in Massachusetts, USA. It is one of the first theropods described in North America and represents a light, cursorial predator among the basal neotheropods. It was a slender animal, with an estimated body length of around 11. 2 meters and a mass that probably did not exceed 1015