Named Anzu, this dinosaur was big for a caenagnathid, about the size of an ostrich with a long tail, and was the most complete dinosaur of its kind found within the Hell Creek Formation.
E. infernalis’ bones were originally labeled as belonging to Anzu wyliei, a dinosaur nicknamed the “chicken from hell,” and ...
Artist’s depiction of Eoneophron infernalis (top left), MOR 752 (bottom left), and Anzu wyliei (right) in the Hell Creek Formation. Illustration by Zubin Erik Dutta. Disclaimer: AAAS and EurekAlert!