Near-Compete Rib Bone of Juvenile Hadrosaurid Dinosaur

Description: The hadrosaurs were a group of dinosaurs that lived in North America during the Late Cretaceous whose most distinguishing feature was a beak that earned them the common name “duck bills”. Their jaws were equipped with an extensive dental battery of up to 2000 teeth which were used to grind up vegetation. Some were known to have migrated in large herds and nested in extensive colonies. The hadrosaur Maiasaura is believed to have exhibited parental care of hatchling, a discovery made by Jack Horner well over 20 years ago. This is the near-complete rib of an immature hadrosaur which is most likely a species of Edmontosaurus. It was found fragmented, and the sections were reassembled to afford this fine example of a bone from a dinosaur that could reach 13 meters in length as a full-grown adult.