Hadrosaurs
Genuine Hadrosaur Dinosaur Bones
Find the remarkable world of the "duck-billed" dinosaurs with the premium selection of Hadrosaur fossils. The Hadrosaurs are commonly know as the "duck-billed dinosaurs". These large herbivores were both bipedal and quadrapedal and grew to a size of ~40 feet. They lived throughout the Cretaceous period, and believed to live in large groups. Fossil remains include well preserved teeth, bones, and claws. These top quality specimens were all legally collected from private lands in the northwestern US. Late Cretaceous, Hell Creek Fm. (or equivalent), 68-66 MYA.
Edmontosaurus was one of the largest members of the hadrosaur family which lived during the late Cretaceous in North America. These were large dinosaurs which grow up to 50 feet in length and weighed up to 10,000 lbs. Edmontosaurus was a herbivore who had a large bill-like snout that was able to nip and tear vegetation, and their jaws were filled with rows of large teeth used to grind vegetation. They appear to live in herds and they would be prey for Tyrannosaurus rex. Edmontosaurus had little defense when attacked by T. rex. They are believed to good speed for their size and a herd of large adults may have been have been threatening to a T. rex. There are two species of Edmontosaurus. There are two species of Edmontosaurus and in the Hell Creek formation, Edmontosaurus annectens was the species present.
Today, we find fossilized Edmontosaurus annectens teeth, unguals (claws), and non-associated bones in the Hell Creek Formation. Authenticity guaranteed.
The Complex Dental Batteries of Hadrosaurs
Duck-billed hadrosaurs possessed one of the most advanced chewing mechanisms in animal history. Their jaws held stacked columns of interlocking teeth that functioned like a continuous grinding pavement.
As tough pine needles and coarse woody plants wore down the top chewing surface, replacement teeth moved upward to fill the gap. Knowing what makes fossils genuine involves examining these distinct enamel ridges and vertical root tracks preserved along the dentary bone.
Locomotion and Unique Hoof-Like Foot Unguals
Fossilized foot bones reveal how large Edmontosaurus specimens supported their immense mass across floodplains. Young duck-bills ran primarily on their hind legs to escape predators, while mature adults grew heavy enough to shift toward four-legged walking. Their pes unguals developed into broad, flattened hoof cores rather than sharp, curved claws. These blunt bone ends distributed weight efficiently over soft mud deposits in prehistoric river basins.
Contact Buried Treasure Fossils to learn more about adding one of these prehistoric treasures to your display.
Frequently Asked Questions
How fast could a large duck-billed dinosaur move when escaping predators?
Biomechanical models of Edmontosaurus annectens show these heavy herbivores reached sprinting speeds near 28 miles per hour. That rapid acceleration gave herds a vital head start when Tyrannosaurus rex ambushed them along river channels.
Did duck-billed dinosaurs shed their teeth individually like sharks?
They retained hundreds of active and replacement teeth jammed tightly together inside deep jaw sockets. Individual teeth slowly wore away against silica-rich plants, exposing lower replacement crowns without leaving empty gaps along the grinding surface.
What preserved skin features appear on mummified specimens of these herbivores?
Exceptional discoveries show dense pebbled scales along the body, flattened tail frills, and fleshy crest structures atop the skull. At Buried Treasure Fossils, we examine texture patterns on associated matrix to identify authentic tissue impressions.
Why do fossil hoof cores from these plant-eaters look so blunt compared to raptor claws?
Evolution flattened their toe unguals into broad spade shapes to stabilize weight on marshy ground. Unlike sharp predatory talons built for puncturing, these thick bone cores provided traction across wetland environments.
How do paleontologists differentiate juvenile jaw bones from full-grown adult specimens?
Younger jaw sections hold fewer vertical tooth columns and measure significantly smaller in overall length. Adolescent dentary bones also show thinner cortical walls before secondary bone layers thicken during adult growth spurts.
- Edmontosaurus - ulna$0.00
A Top Quality Edmontosaurus annectens ulna bone (lower front leg or "arm" bone) from the late Cretaceous of North America. An August Fossil of the Month. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. They were mainly bipedal, but could walk on all four legs in search of food. This specimen is a excellent with no breaks and only minor crack fill. Bone quality is excellent. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus ulna bone. Authenticity guaranteed. An extra large ulna bone from an adult Edmontosaurus. Note - This items weighs 6.5 pounds and shipping surcharge will be applied to the "free shipping" offer.
DH71 SIZE: 24-1/4" x 5" x 3"
Note - Adding 14 Edmontosaurus bones in August 2021. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - skin$0.00
A rare, Top Quality Edmontosaurus annectens fossil skin specimen from the late Cretaceous of North America. An August Fossil of the Month. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. This is a well presereved fossil skin section that sits on top of a section of bone. Excellent articulation. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Glendive area, Dawson Co., Montana. An excellent collector's quality Edmontosaurus fossil skin specimen. Authenticity guaranteed.
DH72 SIZE: 2-1/2" x 7/8"
Note - Adding 14 Edmontosaurus bones in August 2021. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$0.00
A Quality Edmontosaurus annectens "spitter" tooth from the late Cretaceous of North America. "Spitter" teeth are worn teeth released for a replacement tooth. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Excellent preservation showing the intricate texture of the root. No cracks or restoration. Legally collected on private land in the Hell Creek Fm.,Carter Co., Montana. An excellent collector's quality Edmontosaurus tooth. Note - tooth comes with a gem case. Authenticity guaranteed.
DH28 SIZE: 3/8"
Note - Adding 28 new Edmontosaurus fossils in October 2021. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Jaw$0.00
A rare Top Quality Edmontosaurus annectens lower jaw from the late Cretaceous of North America. An October Fossil of the Month. This lower jaw (dentary) section is ~85% complete - missing the very back of the jaw which eroded away. The delicate front of the jaw is 100% complete. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. They possessed ~300 teeth that were in columns of five teeth each which acted as conveyor belt to maintain a large chewing surface to cut and grind their food. This lower jaw includes 25 columns with approximately 65 teeth. Bone quality and color are exceptional. No restoration. Legally collected on private land in the Hell Creek Fm., Garfield Co., Montana. Two cracks were stabilized in the front of the jaw. No restoration. An excellent collector's quality Edmontosaurus jaw which is near complete. Authenticity guaranteed. You rarely find a lower jaw with the original teeth still intact. These lower jaws are my favorite!
DH31 BoP2 SIZE: 11-3/4" x 3-1/8"
Note - Adding 2 Edmontosaurus jaw sections in October 2021. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Humerous$0.00
A Top Quality Edmontosaurus humerous bone from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. This is a juvenile Edmontosaurus humerous (upper arm) bone. Bone quality is excellent. Some crack fill. No restoration. Legally collected on private land in the Lance Creek Fm., Niobrara Co., Wyoming. An excellent collector's quality Edmontosaurus humerous bone. Authenticity guaranteed.
DH40 SIZE: 12" (length) x 2-7/8" (each end width)
Note - Adding 17 Edmontosaurus bones / claws in July 2022. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$0.00
A Top Quality Edmontosaurus annectens tail (caudal) vertebra from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. Bone quality is excellent. Nearly all of the fragile processes are intact! Cracks filled. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Edmontosaurus vertebra. Authenticity guaranteed. Comes with the 4 peg display stand as shown.
DH65 BoP SIZE: 5-1/8" (height) x 1-5/16" (centrum wide) & 1-3/4" (length)
Note - Adding 21 Edmontosaurus bones / claws in August 2023. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Femur$0.00
A Top Quality Edmontosaurus annectens femur leg bone from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. A baby femur. Bone quality is excellent. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An excellent collector's quality Edmontosaurus femur bone. Authenticity guaranteed.
DH35 BoP SIZE: 6-1/2" ( straight line length)
Note - Adding 21 Edmontosaurus bones / claws in August 2023. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Jaw$0.00
A rare Top Quality Edmontosaurus annectens lower jaw from the late Cretaceous of North America. This lower jaw (dentary) section is ~75% complete - missing the very back of the jaw which eroded away. The delicate front of the jaw is 100% complete. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. They possessed ~300 teeth that were in columns of five teeth each which acted as conveyor belt to maintain a large chewing surface to cut and grind their food. Note - the three in the first photo were found with this jaw and they are placed. There are a couple of small teeth that are still attached to the jaw. Bone quality and color iis very good. Cracks are stabilized in this jaw. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus jaw specimen. Authenticity guaranteed. Note - Shipping weight is 2 pounds. International customers will pay a shipping charge.
DH31 SIZE: 10" x 3-3/8"
Note - Adding 21 Edmontosaurus bones in August 2023. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$0.00
A Top Quality Edmontosaurus annectens tail (caudal) vertebra from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. Bone quality is excellent. Partial process is intact. No cracks. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An excellent collector's quality Edmontosaurus vertebra. Authenticity guaranteed.
DH62 1-1/2" (centrum wide) & 1-1/8" (length)
Note - Adding 22 Edmontosaurus bones / claws in April 2024. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$0.00
A Top Quality Edmontosaurus annectens tail (caudal) vertebra from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. Bone quality is excellent. Partial process is intact. No cracks. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An excellent collector's quality Edmontosaurus vertebra. Authenticity guaranteed.
DH60 2-3/8" (height) 2-1/8" (centrum wide) & 1-7/8" (length)
Note - Adding 22 Edmontosaurus bones / claws in April 2024. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Toe Bone$0.00
A Top Quality Edmontosaurus annectens toe bone from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. Bone quality is very good. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An excellent collector's quality Edmontosaurus toe bone. Authenticity guaranteed.
DH49d SIZE: 1-1/4" (length) x 1-1/2" (width)
Note - Adding 22 Edmontosaurus bones / claws in April 2024. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Toe Bone$0.00
A Top Quality Edmontosaurus annectens toe bone from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. Bone quality is very good. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An exceptional collector's quality Edmontosaurus toe bone. Authenticity guaranteed.
DH49c SIZE: 1-1/2" (length) x 1-13/16" (width)
Note - Adding 221 Edmontosaurus bones / claws in April 2024. Link to Edmontosaurus fossils catalog
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