New specimen may be a feathered dinosaur — or the earliest avian yet discovered
A birdlike fossil that dates to roughly 155 million years ago is ruffling the feathers of some paleontologists. At issue is whether the fossil is a dinosaur, an early bird or something in between.
“This new animal is the most primitive bird in the world,” says paleontologist Pascal Godefroit of the Royal Belgian Institute of Natural Sciences. He and an international team of colleagues describe the new specimen May 29 in Nature. The fossil comes from northeastern China’s Tiaojishan formation and is named Aurornis xui.
Not everyone agrees with Godefroit’s interpretation. “This is very birdlike, but it is not yet a bird,” says paleontologist Luis Chiappe of the Natural History Museum of Los Angeles County.