Yuornis
In Depth Yuornis is a genus of enantiornithine bird that lived in China during the late Cretaceous. The skull of Yuornis is noted for being completely toothless. Further reading - A new, remarkably preserved, enantiornithine bird from the Upper Cretaceous Qiupa Formation of Henan (central China) and convergent evolution between enantiornithines and modern birds. - … Read more