This seems backwards to say the least for this missing link. As far as the physical features, Archaeopteryx was a bird with teeth. Though rare, at least 5 other species of birds also have teeth. This doesn't mean they used to be dinosaurs. Well, at least not the really old ones.
Many birds also have claws on their wings.
The hoatzin is one such bird. Another is the touraco Even the ostrich has claws on its wings, but no one claims it is the missing link. Well, even the penguin has un-fused tail vertebrae. This does not mean it used to be a Pengu-saurus. Some have suggested that bird wings evolved from frayed dinosaur scales.