This Specimen has been sold.
Kritosaurus Jaw Section With Rooted Teeth
This is a really cool find, it is a jaw section of a hadrosaurid or duck-billed dinosaur Kritosaurus breviceps. The jaw section itself is pretty crushed and fragmented but about 20 rooted teeth are visible, embedded in it. Jaw sections with teeth still in place are rare finds. The matrix has been heavily stabilized to keep it from falling apart.
Hadrosaursare frequently referred to as duck-billed dinosaurs and are members of the Ornithischian family Hadrosauridae. They were fairly common herbivores which 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.