Is this fragile jawbone a pterosaur or not? Other researchers also had questions about the fossil, unearthed along with thousands of others during a decades-long archaeological dig at a remote bone bed in the Petrified Forest National Park in Arizona.

Paleontologists have uncovered in Arizona a Triassic treasure trove of fossils dating back 209 million years ago.

A cache of Triassic fossils in Arizona has revealed Eotephradactylus mcintireae, or "ash-winged dawn goddess," the oldest pterosaur ever discovered in North America.