Velociraptor built it, and then they discovered it. That still boggles my mind." Spielberg was particularly pleased with the discovery of the "Utahraptor" because of the boost it gave to the velociraptors in his film. Spielberg's name was briefly considered for naming of the new dinosaur. In reality, "Velociraptor", like many other maniraptoran theropods, was covered in feathers. Velociraptor Velociraptor (; meaning "swift seizer" in Latin) is a genus of dromaeosaurid theropod dinosaur that lived approximately 75 to 71 million years ago during the latter part of the Cretaceous Period. Two species are currently recognized, although others have been assigned in
Dinosaur breast bone. Comparison of bird and dinosaur skeletons through cladistic analysis strengthens the case for the link. Large meat-eating dinosaurs had a complex system of air sacs similar to those found in modern birds, according to a 2005 investigation led by Patrick M. O'Connor. The lungs of theropod dinosaurs (carnivores that walked on two legs and had bird-like feet) likely pumped air into hollow sacs in their skeletons, as is the case in birds. "What was once formally considered unique to birds was present in some form in the ancestors of birds", O'Connor said. In 2008, scientists described "Aerosteon riocoloradensis",