19.6" Hadrosaur (Edmontosaurus) Vertebra With Metal Stand - Montana

Hadrosaur (Edmontosaurus) Vertebra With Metal Stand - Montana #210652

This is a proximal caudal vertebra of a hadrosaur (Edmontosaurus annectens) from the Hell Creek Formation of Dawson County, Montana. It is in excellent condition, complete with both transverse processes, a spinous process, a beautifully preserved centrum, and both prezygapophyses and postzygapophyses. Most of the cortical bone has weathered away, exposing the bone cell canals within. The preservation of the processes is amazing, considering these features are often lost over the years due to their fragile nature.

The entire vertebra measures 19.6 x 14.4" (2.7" thick centrum) and is accompanied by the pictured custom metal display stand.

Each process required gap fill restoration and crack repair to piece back together. The transverse processes have restoration at their proximal and distal ends, with intact bone visible between the two points of restoration on each side. The distal end of the spinous process has undergone some gap fill restoration and there are crack repairs throughout the process. The pedicles around the neural canal are in phenomenal condition, requiring some crack repair, but no gap fill restoration. There are some minor spots of gap fill restoration and repaired cracks through the centrum, however it is approximately 95% complete.

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.

SPECIES

Edmontosaurus annectens

AGE

Late Cretaceous (~66 Million Years)