Velociraptor mongoliensis was plumaged

Tooth enamel isotopes indicate that the species was a grassland herbivore that drank from various water sources

The skull of the Yi qui was small and elongated

Snout-tail length 145 mm

which they may have used for hunting or defense

Acrocanthosaurus atokensis Acrocanthosaurus Velociraptor mongoliensis was plumagedAcrocanthosaurus atokensis is the only known species of the extinct genus Acrocanthosaurus, a carcharodontosaurid theropod dinosaur that inhabited North America during the Cretaceous period, approximately 125 to 99. 6 million years ago. It stands out for the tall neural spines on many of its vertebrae, which suggest the presence of a kind of "hump" on its neck, back and hips. It was one of the largest theropods, with a length of up to 11. 5 meters and