A supersized chickenlike reptile with large, sharp claws and a toothless beak is the latest creature to earn the distinction of being called a dinosaur.
The creature is named Anzu wyliei, its genus named after a birdlike demon in Mesopotamian mythology, and the researchers describing the dinosaur jokingly refer to it as a “chicken from hell.” It is the second-largest birdlike, feathered dinosaur behind Gigantoraptor and the largest found in North America. The species probably roamed what are now the Dakotas 66 million to 68 million years ago with Tyrannosaurus rex and Triceratops.
A. wyliei was identified from three fossil finds that, when combined, make a nearly complete skeleton. Based on calculations from the skeleton, the birdlike reptile would have been bigger than the biggest ostrich, measuring 3.5 meters long and weighing 200 to 300 kilograms, scientists report March 19 in PLOS ONE.