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.

The Hell Creek Formation

Renowned for both its age and rich sedimentary layers, the Hell Creek Formation is one of the most intensively studied fossil-bearing regions on Earth. To date, scientists have documented 158 genera of animals and 64 genera of plants from its rocks, with new finds emerging regularly. Beyond iconic dinosaurs such as tyrannosaurs, ceratopsians, and hadrosaurs, the formation has produced an extraordinary array of life, including amphibians, reptiles, lizards, snakes, turtles, fish, sharks, birds, and early mammals. Together, these fossils provide the most complete picture of the ecosystems that thrived just before the Cretaceous–Paleogene extinction event.

More about Hadrosaurs