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 - Toe$1,495.00
A 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 three piece toe is #2 from the left foot. Little crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An exceptional collector's quality Edmontosaurus toe with great color Authenticity guaranteed. Note - This items weighs ~3 pounds and an international shipping surcharge will be applied to the "free shipping" offer.
DH42 SIZE: 9-1/4" (length) Ungual: 3-1/2" (length) x 4-1/8" (width)
Note - Adding 19 Edmontosaurus bones / claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Humerous$1,450.00
A Top Quality Edmontosaurus humerous bone from the late Cretaceous of North America. An May Fossil of the Month. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. This is a complete Edmontosaurus humerous (upper arm) bone. Bone quality is excellent. Some crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An exceptional collector's quality Edmontosaurus humerous bone with great color. Authenticity guaranteed. Note - This items weighs 9.5 pounds and an international shipping surcharge will be applied to the "free shipping" offer.
DH38 SIZE: 21-1/2" (length) ; Ends: 5" & 4-1/4" (each end width)
Note - Adding 19 Edmontosaurus bones / claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Hadrosaur - Maxilla (upper jaw)$1,250.00
A Top Quality Hadrosaur maxilla (upper jaw) section from the late Cretaceous (Horseshoe Canyon Fm.) of North America. This jaw section contains 10 exposed teeth. This hadrosaur or "duck-bill" dinosaur was found in the Horseshoe Canyon Formation in Alberta. The maxilla possessed 100s teeth that were in rows of teeth which acted as conveyor belt to maintain a chewing surface to cut and grind their food. This specimen is a section of the lower jaw includes ten rows of teeth. Bone quality is excellent. No restoration. Legally collected on private land in the Horseshoe Canyon Fm., Alberta, Canada. An excellent collector's quality Edmontosaurus maxilla section from a rare location. Authenticity guaranteed. Disposition number #000028-0000029.
DH33 SIZE: 4" x 3-1/2"
Note - Adding 22 Hadrosaur /Edmontosaurus bones & claws in April 2022. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Vertebra$975.00
A Top Quality Edmontosaurus annectens tail (caudal) vertebra with process 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. Bone quality is excellent. Processes are intact. Some crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Baker, Fallon Co., Montana. An excellent collector's quality Edmontosaurus vertebra display with process! Authenticity guaranteed. This vertebra comes with a custom stand as in the photos. Note - This items weighs 9.5 pounds and an international shipping surcharge will be applied to the "free shipping" offer.
DH51 SIZE: 16-3/4" (height) x 7-1/4" (wide) & 2-3/8" (length) Height on stand = 19-1/2".
Note - Adding 19 Edmontosaurus bones / claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Metatarsal$895.00
A Top Quality Edmontosaurus annectens metatarsal bone from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. The metarsals were the largest toe bones. This bone is metatarsal II from toe 2 from the left foot. Bone quality is excellent. Minor crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus metatarsal bone. Authenticity guaranteed. Note - This items weighs 3 pounds and an international shipping surcharge will be applied to the "free shipping" offer.
DH48 SIZE: 9-3/4" length ; End width = 6-1/2" & 5-1/2"
Note - Adding 19 Edmontosaurus bones in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Fibula$695.00
A Top Quality Edmontosaurus annectens fibula bone (lower hind 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. They were mainly bipedal, but could walk on all four legs in search of food. An fibula bone from a juvenile Edmontosaurus. This specimen is complete with crack fill. Bone quality is good. No restoration. Legally collected on private land in the Hell Creek Fm., Garfield Co., Montana. An excellent collector's quality Edmontosaurus ulna bone. Authenticity guaranteed. Note - This items weighs 1.5 pounds and an international shipping surcharge will be applied to the "free shipping" offer.
DH37 SIZE: 16-1/4" End width: 2-1/2" & 2-1/16"
Note - Adding 19 Edmontosaurus bones in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Dentary Section$575.00
A Top Quality Edmontosaurus annectens lower jaw (dentary) section from the late Cretaceous of North America. 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. An excellent juvenile dentary section showing 11 "conveyor tracks" that held their lower jaw teeth. Crack fill. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An exceptional collector's quality Edmontosaurus dentary section. Authenticity guaranteed.
DH32 SIZE: 4-1/4" (length) 2" (height)
Note - Adding 19 Edmontosaurus bones / claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Cervical Vertebra$495.00
A Top Quality Edmontosaurus annectens neck (cervical) vertebra from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. A "wild looking" pathologic vertebra. Bone quality is excellent. Processes are intact with some crack fill. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An exceptional collector's quality Edmontosaurus vertebra. Authenticity guaranteed. Note - This items weighs 1.3 pounds and an international shipping surcharge may be applied to the "free shipping" offer.
DH53 SIZE: 5-1/4" (height) x 7-1/4" (wide) & 2-3/8" (length)
Note - Adding 19 Edmontosaurus bones / claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Chevron$495.00
A Top Quality Edmontosaurus annectens caudal (tail) vertebra "chevron" from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. The chevron is the appendage that resides below the tail vertebra that provides structure to the base of the tail. Chevron bones rarely survive and this one is 98% complete - rare! Bone quality is excellent and heavy. One crack. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus chevron bone. Authenticity guaranteed.
DH66 SIZE: 7-1/2" (length)
Note - Adding 19 Edmontosaurus bones / claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$495.00
A Top Quality Edmontosaurus vertebra from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. A complete rib bone. Bone quality is excellent. Minor crack fill. Final 2" of rib is restored. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus rib bone. Authenticity guaranteed. Note - This items weighs 1.5 pounds and an international shipping surcharge will be applied to the "free shipping" offer.
DH39 SIZE: 19" (length)
Note - Adding 19 Edmontosaurus bones & claws in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus - Metatarsal$395.00
A Top Quality Edmontosaurus annectens metatarsal bone from the late Cretaceous of North America. Edmontosaurus is a very large hadrosaur or "duck-bill" dinosaur found in the Hell Creek formation. The metarsals were the largest toe bones. This bone is metatarsal VI from toe 4 from the right foot. Bone quality is excellent. Minor crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus metatarsal bone. Authenticity guaranteed. Note - This items weighs 1.3 pounds and an international shipping surcharge may be applied to the "free shipping" offer.
DH49 SIZE: 7-1/2" length ; Ends = 2-3/4" & 2-3/4"
Note - Adding 19 Edmontosaurus bones in May 2026. Link to Edmontosaurus fossils catalog
Learn More - Edmontosaurus$375.00
A RARE LARGE, Top Quality Edmontosaurus annectens rooted tooth from the late Cretaceous of North America. A complete root plus a second root. This specimen resides on its original Hell Creek Fm. matrix. 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. One crack stabalized. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. An excellent collector's quality Edmontosaurus tooth. Authenticity guaranteed.
DH01 SIZE: 2-3/8"
Note - Adding 20 new Edmontosaurus fossils in March 2024. Link to Edmontosaurus fossils catalog
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