12" Partial Fossil Edmontosaurus Humerus - South Dakota

Partial Fossil Edmontosaurus Humerus - South Dakota #145877

This is a 12" long, juvenile Hadrosaur (Edmontosaurus annectens) partial humerus bone from the left arm, collected from the Hell Creek Formation in Harding County, South Dakota. It was collected this last spring and has been nicely prepared from the hard rock surrounding it.

This is the proximal half of the humerus (shoulder end). The distal half of the humerus just beneath deltopectoral crest wasn't recovered. Overall, the bone preservation is pretty nice, with cortical bone still present. The bone was found fractured and required some crack repair to piece back together. The articular head broke away, revealing the nicely preserved bone matrix.

It comes with an acrylic display stand.

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