Hadrosaur Dentary Fragment with Preserved Tooth Fragments, Alberta (disposition #001590)

This hadrosaur jaw fragment from Alberta preserves part of the dental battery, with tooth fragments still embedded in the jaw. Measuring 10.5 × 5 × 6 cm, the specimen exposes closely spaced tooth positions and surviving dental material, providing an instructive view of the relationship between the teeth and their supporting bone.

Hadrosaurs, commonly known as duck-billed dinosaurs, possessed highly specialized jaws containing tightly packed groups of teeth. Successive replacement teeth developed beneath the working teeth, maintaining a surface for processing plant material as older teeth wore down. The upper and lower dental batteries worked together to break down vegetation.

Here, the incomplete preservation exposes portions of that feeding apparatus. Elongated tooth fragments can be seen alongside the parallel grooves of the jaw, while another view reveals broken sections through the retained dental material. The specimen also shows visible cracks, weathered bone surfaces and irregular broken margins. The preserved teeth are fragmentary rather than complete crowns.

From the Harvey Negrich Collection, this specimen offers more than the outline of a dinosaur jaw: it retains elements of the dental system itself. The combination of jaw structure and embedded tooth fragments makes it a particularly engaging addition to a collection focused on Alberta’s dinosaurs or dinosaur feeding adaptations.

Legal Status: This specimen is legally available for private ownership and resale under Alberta Disposition Certificate #001590. A copy of the disposition documentation will accompany the specimen. Learn more about Alberta fossils and the disposition process.

Family: Hadrosauridae indet. (hadrosaur; exact species undetermined)
Age: Late Cretaceous (Campanian or 74.8 - 77.5 million years ago)
Formation: Dinosaur Park or Oldman formation (Belly River/Judith River Group)
Locality: North of Brooks, Alberta, Canada
Dimensions: 10.5 × 5 × 6 cm
Provenance: Harvey Negrich Collection
Alberta Disposition Certificate Number: 001590 (specimen #HN284) issued July 7, 2026