Ankylosaurs
Ankylosaurs and the Nodosaurs, their cousins, are the familiar armored dinosaurs from the late Cretaceous period. They were covered with osteoderms or boney plates of protective armor, and the Ankylosaurs had a clubbed tail for added defense. The Ankylosaurs and the Nodosaurs were large. Ankylosaurus, the largest Ankylosaur, reached lengths up to 30 feet and weight to 17000 lbs. Edmontonia, a Nodosaur, reached lengths of 22 feet and weighed up to 7000 lbs. These dinosaurs were built close to the ground, wide barrel-chested, and quadrupedal. You can see them referred as the “tanks” of the dinosaur world, and would be quite challenging for a Tyrannosaur or raptor to attack; especially, the Ankylosaurs with their club tails. Many Tyrannosaurs including Tyrannosaurus rex have been found with broken and healed leg fractures. Those dinosaurs may have survived an encounter with an Ankylosaur.
Ankylosaurs and the Nodosaurs were herbivores. They had good sized teeth for cutting or nipping low lying vegetation. Today, we find their fossilized teeth, osteoderms (armor plates), and bones. We have a great assortment of Ankylosaurus fossils for sale. Note – Ankylosaurus was a rare species composing of only 1% of the dinosaurs species found in the Hell Creek Formation. Authenticity guaranteed.
Species include the following –
Ankylosaurus magniventris – the largest Ankylosaur, Hell Creek Formation; 67-66 mya
Denversaurus schlessmani - a nodosaurid ankylosaurian dinosaur, Hell Creek Formation; 67-66 mya
Euplocephalus tutus – an Ankylosaur, Judith River / Two Medicine / Horseshoe Canyon Fm.; 76-75 mya
Edmontia rugosidens – a Nodosaur, Judith River / Two Medicine / Horseshoe Canyon Fm.; 77-69 mya
- Ankylosaurus osteoderm$1,150.00
An EXTRA LARGE, Top Quality Ankylosaurus osteoderm (bony armor plate) from the late Cretaceous of northern North America. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds, and a body covered with this bony armor. A complete body osteoderm plate from an adult Ankylosaurus. The bone quality is excellent with excellent color and patina. This osteoderm has a high ridge on one side. There are some hydration cracks and crack fill. No restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Authenticity guaranteed. An excellent collector's quality Ankylosaur osteoderm. A thick and heavy osteoderm.
DK23 SIZE: 6-1/2" x 4-3/8" (Height = 1-3/4" on high side)
Note - Adding 7 new Ankylosaur - Nodosaur fossils in August 2025. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus osteoderm$875.00
An EXTRA LARGE, High Quality Ankylosaurus osteoderm (bony armor plate) from the late Cretaceous of northern North America. An August Fossil of the Month. Ankylosaurus and Denversaurus, a Nodosaur, were the two Ankylosaurs present in the Hell Creek and Lance Creek Formations. A complete body osteoderm plate from an adult Ankylosaurus. The bone is excellent quality with excellent color / patina. Some natural crack. No restoration. Legally collected on private land in the Lance Creek Fm., Niobrara Co., Wyoming. Authenticity guaranteed. A collector's quality Ankylosaurus osteoderm. I do not see large ostederms very often. Note - Osteoderm weighs 1.5 lbs. An international shipping surcharge will be added to "free shipping".
DK21 SIZE: 5-1/2" x 4-1/2"
Note - Adding 10 new Ankylosaurus - Nodosaur fossils in August 2021. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus osteoderm$750.00
A LARGE, Top Quality Ankylosaurus osteoderm (bony armor plate) from the late Cretaceous of northern North America. Ankylosaurus and Denversaurus, a Nodosaur, were the two Ankylosaurs present in the Hell Creek and Lance Creek Formations. A complete body osteoderm plate from an adult Ankylosaurus. The bone is excellent quality with excellent color / patina. Well preserved vascular channels. No cracks or restoration. Legally collected on private land in the Lance Creek Fm., Niobrara Co., Wyoming. Authenticity guaranteed. A collector's quality Ankylosaurus osteoderm. I do not see large ostederms very often.
DK25 SIZE: 5" x 3-3/4" x 1/2"
Note - Adding 7 new Ankylosaurus - Nodosaur osteoderms in August 2025. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$650.00
An ultra rare, Top Quality Ankylosaurus magniventris rooted tooth from the late Cretaceous of North America. A June Fossil of the Month. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds. Note - These incredibly sized dinosaurs had small teeth and this rooted tooth is from a juvenile Ankylosaurus. The enamel is the highest quality with excellent color / patina. The crown has no wear facet. No cracks or restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Authenticity guaranteed. An excellent collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured. Rooted Ankylosaurus teeth are quite rare.
DK11 SIZE: 1/4" (1/8" wide)
Note - Adding 9 new Ankylosaur / Nodosaur fossils in June 2024. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$595.00
A rare, Top Quality Ankylosaurus magniventris partially rooted tooth from the late Cretaceous of North America. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds. Note - These incredibly sized dinosaurs had small teeth and this rooted tooth is from a sub adult Ankylosaurus. The enamel is the highest quality with excellent color / patina. The crown has a very small wear facet. No cracks or restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Authenticity guaranteed. An excellent collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured.
DK10 SIZE: 1/4" (3/16" wide)
Note - Adding 9 new Ankylosaur / Nodosaur fossils in June 2024. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$495.00
A rare, Top Quality Ankylosaurus magniventris partially rooted tooth from the late Cretaceous of North America. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds. Note - These incredibly sized dinosaurs had small teeth. The enamel is the highest quality with excellent color / patina. The crown has a little wear facet. No cracks or restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Authenticity guaranteed. An excellent collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured.
DK09 SIZE: 5/16" (3/16" wide)
Note - Adding 9 new Ankylosaur / Nodosaur fossils in June 2024. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$495.00
A rare, Top Quality Ankylosaurus magniventris tooth from the late Cretaceous of North America. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds. Note - These incredibly sized dinosaurs had small teeth. The enamel is very good quality with excellent color / patina. The crown has little wear. No cracks or restoration. Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. Authenticity guaranteed. An excellent collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured.
DK08 SIZE: 3/8" (1/4" wide)
Note - Adding 16 new Ankylosaur / Nodosaur fossils in January 2023. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$425.00
A rare, Top Quality Ankylosaurus magniventris tooth from the late Cretaceous of North America. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds. Note - These incredibly sized dinosaurs had small teeth. The enamel is the highest quality with excellent color / patina. The crown has a typical wear facet. No cracks or restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Authenticity guaranteed. An excellent collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured.
DK07 SIZE: 5/16" (1/4" wide)
Note - Adding 9 new Ankylosaur / Nodosaur fossils in June 2024. Link to Ankylosaur fossils catalog.
Learn More - Zuul crurivastator - Ankylosaur$425.00
A Top Quality, Zuul crurivastator tooth (Ankylosaur) from the late Cretaceous of northern North America. The Campanian age Ankylosaurs grew to 20 feet and 6000 pounds, and a body covered with this bony armor. This tooth exhibits excellent quality with excellent color / patina. No cracks or restoration. ~76 MYA. Legally collected on private land in the Judith River Fm., Wheatstone Co., Montana. Authenticity guaranteed. A collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured.
DK12 SIZE: 1/4" (3/16" W)
Note - Adding 16 new Ankylosaur - Nodosaur fossils in January 2023. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaur osteoderm - Zuul$425.00
A Top Quality Zuul crurivastator, an Ankylosaur, osteoderm or scute (bony armor plate) from the late Cretaceous of North America. The Campanian age Ankylosaurs grew to 20 feet and 6000 pounds, and a body covered with this bony armor. The bone is excellent quality with excellent color / patina. An excellent raised keell. A complete scute from an Ankylosaur with some crack fill. ~76 MYA. Legally collected on private land in the Judith River Fm., Havre, Montana. Discovered in 2016. Authenticity guaranteed. A collector's quality Ankylosaur osteoderm.
DK28 SIZE: 3-5/8" x 1-3/4" Height of Keel = 7/8"
Note - Adding 7 new Ankylosaur - Nodosaur scutes in August 2025. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaur osteoderm$425.00
A Top Quality Ankylosaur osteoderm (bony armor plate) from the late Cretaceous of northern North America. Ankylosaurus and Denversaurus, a Nodosaur, were the two Ankylosaurs present in the Hell Creek and Lance Creek Formations. A complete body osteoderm plate from an adult Ankylosaur. The bone is exceptional quality with excellent color and patina. No hydrations cracks. No restoration. Legally collected on private land in the Hell Creek Fm., Harding Co., So. Dakota. Authenticity guaranteed. A fantastic collector's quality Ankylosaur osteoderm. I do not see top quality ostederms very often.
DK29 SIZE: 3-1/2" x 2-1/4" Height of keel = 3/4"
Note - Adding 7 new Ankylosaur osteoderms in August 2025. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurid osteoderm - Canada$395.00
A Top Quality Ankylosaurid osteoderm (bony armor plate) from the late Cretaceous of northern North America. Ankylosaurids had their body covered with this bony armor. A body osteoderm section from a juvenile Ankylosaurid . The bone is excellent quality with excellent color and patina. It has an excellent keel like design and is very thick. Some crack fill.. Legally collected on private land in the Horseshoe Canyon Fm., Alberta, Canada. Authenticity guaranteed. A collector's quality Ankylosaur osteoderm. Disposition number 000028-0000029.
DK21c SIZE: 3-5/8" x 2-1/2" x 1-1/8" Height
Note - Adding 7 Ankylosaur osteoderms in August 2025. Link to Ankylosaur fossils catalog.
Learn More
