21.7" Hadrosaur (Edmontosaurus) Ischium Bone - South Dakota

Hadrosaur (Edmontosaurus) Ischium Bone - South Dakota #192674

This is a 21.7" long Hadrosaur (Edmontosaurus annectens) ischium bone (pelvic element) from the Hell Creek Formation in Harding County, South Dakota. The majority of this bone preserved beautifully, requiring minimal restoration to piece back together. There are several repaired cracks through the bone, with the majority of the cracks and fractures centralized around the thinnest point (proximal end) of the bone. The obturator process had to be pieced back together, though the fact the the bone was still present during collection, is quite impressive. There is some weathering to the pubic peduncle, but it is still intact. The iliac peduncle and the distal end (ischial foot) of the ischial shaft weren't recoverable.

Comes with an acrylic display stand to assist with presentation.

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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