Tyrannosaurs - sternum not suitable for flight
Compsognathus -sternum not suitable for flight?
Ornitholestes - sternum not suitable for flight
Therizinosaur - sternum not suitable for flight?
Deinonychus - sternum not suitable for flight
Dromaeosaurus - sternum not suitable for flight
Utahraptor - sternum not suitable for flight
Bambiraptor* - sternum suitable for flight
Alvarezsaurs** - sternum suitable for flight
Microraptor - sternum suitable for flight
Velociraptor - sternum suitable for flight?
Ornithothoraces (Hesperornithes, Presbyornithids, Confuciusornithids, Ichthyornithes) - sternum suitable for flight
Pterosaur - sternum suitable for flight
Bambiraptor had quite a few features in common with modern birds. It had a wishbone, something all modern birds have that allow them to flap their wings, and its arms and hands were very long for its body size. In fact, the length of its arms and hands approached the lengths needed for flight. It also had an ossified sternum, a bone that is essential for birds to be able to move their wings for flying. Even with these similarities, however, there is no doubt that Bambiraptor was still a dinosaur from the raptor family. It had the killer claw on its foot like Velociraptor, and it had a mouth full of sharp teeth. It is considered by many to be the North American version of Archaeopteryx. Clearly a short step away from its European relative, this specimen is an exceptionally important piece of the bird/dinosaur puzzle. With more than 90 percent of the animal discovered, along with the remains of what may be a second individual, this specimen will continue to provide insight into the evolution of birds.** http://en.wikipedia.org/wiki/Alvarezsauridae
These mistaken [actually correct] assignments of alvarezsaurs to birds were caused primarily by features that are strikingly, or even uniquely, avian. The sternum, for example, is elongated and deeply keeled for an enlarged pectoralis muscle, as it is in neognathous birds and volant ratites. One bone in the skull of Shuvuuia appeared to be an ectethmoid fused to a prefrontal. The ectethmoid is an ossification known only in Neornithes. Other birdlike characters included the palatine, foramen magnum, cervical and caudal vertebrae, and many others.Metornithes
bat skeletal structure, focusing on the sternum.
Dinosaurs do not have a sternum suitable for flying.
Metornithes (Alvarezsauria + Aviremigia) have a sternum suitable for flying.
Pterosaurs have a sternum suitable for flying.
We can see there is no relationship of dinosaurs to primitive birds.
There is a relationship with pterosaurs.