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.
- Brachylophosaurus - Pes Ungual$0.00
A rare, Top Quality Brachylophosaurus tail ungual (toe claw) from the late Cretaceous (Judith River Fm.) of North America. Brachylophosaurus is a mid-sized hadrosaur or "duck-bill" dinosaur found in the Judth River formation. Bone quality is excellent. Note - the distinctive ventral ridge is located on the base of the ungual. One crack. No restoration. Legally collected on private land in the Judith River Fm., Hill Co., Montana. An excellent collector's quality Brachylophosaurus ungual. Authenticity guaranteed. A rare item.
DH73 1-3/4" (wide) & 1-13/16" (length)
Note - Adding 22 Hadrosaur bones / claws in April 2024. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$0.00
A LARGE, Top Quality Edmontosaurus annectens toe 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 non-associated set of toe bones from the outer toe (toe IV - see diagram), and it consists of four four toe bones (Phalanx 1 thru 4) and a pes hoof core (ungual). Bone quality is excellent with minor crack fill on Phalanx 1 & 2 only. Other pieces are perfect including an exceptional pes ungual. No restoration. Legally collected on private land in the Hell Creek Fm., Carter & Garfield Co., Montana. An exceptional collector's quality Edmontosaurus toe. Authenticity guaranteed.
DH41 BoP SIZE: 12-1/4" (combined length) ; Phalanx #1 3-7/8" x 5" ; Pes Ungual 3-3/4" x 3-1/2"
Note - Adding 4 Edmontosaurus toes / claws in August 2020. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Jaw$0.00
A Top Quality Edmontosaurus annectens lower jaw section 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 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 specimen is a large section of the lower jaw showing at least 20 teeth still in place. Bone quality is excellent with no cracks. No restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. A exceptional specimen from one of my favorite localities. An exceptional collector's quality Edmontosaurus jaw section. Authenticity guaranteed.
DH31 BoP SIZE: 4-1/4" x 2-5/8"
Note - Adding 6 Edmontosaurus jaw sections in August 2020. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Vertebra$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., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus vertebra. Authenticity guaranteed.
DH65 SIZE: 1-1/4" (height) x 1-1/4" (centrum wide) & 1-1/8" (length)
Note - Adding 21 Edmontosaurus bones / claws in May 2025. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus vertebrae$0.00
A five associated, Top Quality Edmontosaurus annectens tail (caudal) vertebrae 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., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus vertebra. Authenticity guaranteed.
DH61 SIZE: 1-1/4" (height) x 1-1/4" (centrum wide) & 4-7/8" (length)
Note - Adding 21 Edmontosaurus bones / claws in May 2025. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Vertebra$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., Powder River Co., Montana. An excellent collector's quality Edmontosaurus vertebra. Authenticity guaranteed.
DH58 SIZE: 4" (height) x 2-1/2" (centrum wide) & 2-1/8" (length)
Note - Adding 21 Edmontosaurus bones / claws in May 2025. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Metacarpal$0.00
An EXTRA LARGE, Top Quality Edmontosaurus annectens metacarpal from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. The metacarpal is the first and largest bone in the hand. Excellent bone quality. Crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus metacarpal bone. Authenticity guaranteed. Note - Shipping weight is 1.6 pounds. International customers will pay a supplemental shipping charge.
DH47 SIZE: 12-1/4" (length) 2-1/2" (width at ends)
Note - Adding 21Edmontosaurus bones / claws in May 2025. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Pes Ungual$0.00
A Top Quality Edmontosaurus annectens foot claw (pes ungual) from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Lance Creek formation. Some crack fill. No repair or restoration. Legally collected on private land in the Lance Creek Fm., Niobrara Co., Wyoming. An excellent collector's quality Edmontosaurus pes ungual. Authenticity guaranteed.
DH43 SIZE: 3-3/8" (length) 3-1/8" (width)
Note - Adding 21Edmontosaurus bones / claws in May 2025. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Toe$0.00
A LARGE, Top Quality Edmontosaurus annectens toe from the late Cretaceous of North America. A MAy Fossil of the Month. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. This four piece toe is #3. Some crack fill. Minor repair or no restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus toe. Authenticity guaranteed. Note - this toe weighs 4.5 lbs and international customers will pay a supplemental shipping charge.
DH41 SIZE: 12-1/2" (length) 5" (width)
Note - Adding 21Edmontosaurus bones / claws in May 2025. Link to Edmontosaurus fossils catalog
Learn More - Hadrosaur tooth - No. Carolina$0.00
A rare, Top Quality Hadrosaur tooth from the late Cretaceous of No. Carolina. Hadrosaurs are known as "duck-bill" dinosaurs found in North America. The enamel is very good quality with excellent color / patina. A great partial crown with serrations. No repair or restoration. Legally collected on private land in the Tar Heel Fm., Elizabethtown, No. Carolina. Early to Middle Campanian age (83 - 77 mya). An excellent collector's quality Hadrosaur tooth. Note - tooth comes with a gem case. Authenticity guaranteed.
DNC1 SIZE: 5/16"
Note - Adding 20 raptor teeth & other rare dinosaur fossils in May 2025. Link to Haadrosaur fossils catalog
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