11.4" Hadrosaur (Edmontosaurus) Maxilla With Teeth - Montana

This is a 11.4" long maxilla of Edmontosaurus annectens with many of the teeth still in place. The preservation of the bone is quite nice, with very little restoration required to piece this beauty back together. It did require some spots of crack repair where the bone fractured and separated within the rock. Restoration is in the form of gap fill and was only required in spots where fragments of bone were lost where it fractured.

Many of the small details of the bone still remain, including natural grooves on the inside of the maxilla, as well as some of the foramina. Also... Look at all those teeth! This maxilla still contains a full battery of teeth with worn feeding surfaces from grinding down foliage.

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.
Edmontosaurus annectens
Dawson County, Montana
Hell Creek Formation
11.4 x 4 x 2.8"
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