20.1" Fossil Hadrosaur (Edmontosaurus) Left Humerus - Montana

Fossil Hadrosaur (Edmontosaurus) Left Humerus - Montana #207034

This is a 20.1" long Hadrosaur (Edmontosaurus annectens) left humerus bone, collected from the Hell Creek Formation in Montana. The colorful bone preservation is breathtaking!

On the included metal display stand, this specimen stands just under 20.5" tall

The humeral shaft has undergone crack repair and restoration in spots where the bone was found broken within the rock. At the proximal end, the anterior edge of the shaft has a large section of gap fill restoration just inferior to the epiphysis. Additional gap fill restoration can be seen through the distal end of the humeral shaft where the bone was found heavily fragmented. Both the proximal and distal points of articulation are in great condition, requiring relatively little crack repair or gap fill, especially at the distal end. Restoration on this specimen is easily identified by locating spots where the bone transitions to a soft texture with brown coloration.

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.

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