24" Fossil Hadrosaur (Edmontosaurus) Right Humerus - South Dakota

Fossil Hadrosaur (Edmontosaurus) Right Humerus - South Dakota #145811

This is a 24" long Hadrosaur (Edmontosaurus) right humerus bone, collected from the Hell Creek Formation in South Dakota. This specimen comes with the pictured display stand.

The ulnar and radial condyles are intact, though they required some crack repair in spots. There is a large repaired crack that runs through the distal metaphysis which required gap fill restoration. There are dozens of fractures throughout the diaphysis that required crack repair and gap fill restoration to piece back together. The deltopectoral crest had broken away from the humerus, requiring restoration to reattach it to the rest of the bone. The proximal end of the bone also required gap fill restoration in spots where the bone crumbled away. The entire humerus has been painted to color match the restoration.

Hadrosaurs

are frequently referred to as duck-billed dinosaurs and are members of the Ornithischian family Hadrosauridae. They were fairly common herbivores that roamed Asia, Europe, and North America during the Upper Cretaceous Period. Many species of Hadrosaurs had distinctive crests on their heads, some of which had air-filled chambers that may have produced a distinct sound. These crests may have been used for both audio and visual display purposes.

Because of its age and sedimentary composition, the Hell Creek Formation has become one of the most paleontologically studied areas in the world. 158 genera of animals and 64 genera of plants are known from the formation and new discoveries are made frequently. In addition to Tyrannosaurs, Ceratopsids, and Hadrosaurs, the formation has yielded remains of amphibians, reptiles, lizards, snakes and turtles, fish and sharks, avian and non-avian dinosaurs, and mammals. The Hell Creek Formation gives the most complete understanding of the environment just before the Cretaceous-Paleogene extinction.

More about Hadrosaurs