Paleontologists have described two new species of azhdarchid pterosaurs from fossils found in the Late Cretaceous Bayanshiree Formation in Mongolia’s Gobi Desert. The two new species lived in Mongolia during the Late Cretaceous epoch, between 96 and 90 million years ago. Named Gobiazhdarcho tsogtbaatari and Tsogtopteryx mongoliensis, both flying reptiles belong to a cosmopolitan family of toothless, probably terrestrial-foraging pterosaurs called Azhdarchidae. The discovery of these two new species fills in important temporal gaps in the evolutionary history of azhdarchid pterosaurs. “Our results shed fresh light on the diversity and phylogeny of azhdarchid pterosaurs,” the scientists said.