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
Zuul crurivastator – an Ankylosaur, Judith River Fm.; 76-75 mya
Edmontia rugosidens – a Nodosaur, Judith River / Two Medicine / Horseshoe Canyon Fm.; 77-69 mya
- Ankylosaur osteoderm - Zuul$6,750.00
A GEM Quality Zuul crurivastator, an Ankylosaur, osteoderm or scute (bony armor plate) from the late Cretaceous of North America. An August Fossil of the Month. This Campanian age Ankylosaur grew to 20 feet and 6000 pounds, and a body covered with this bony armor. The bone exhibits exceptional quality with excellent color and patina. This specimen is incredible - absolutely complete with excellent raised keel. Scute has minor crack fill. No restoration. Legally collected on private land in the Judith River Fm. (~76 MYA), Petroleum Co., Montana. Authenticity guaranteed. A rare collector's GEM quality Zuul osteoderm. Best quality.
DK28 SIZE: 5-1/4" x 4" Height of Keel = 1-3/8"
Note - Adding 10 new Ankylosaur - Nodosaur scutes in August 2026. Link to Ankylosaur fossils catalog.
Learn More - Denversaurus osteoderm$1,150.00
A Top Quality Denversaurus 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 osteoderm from a Nodosaur with two central spikes. Most likely a tail ostederm. The bone is excellent quality with excellent color and patina. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Ziebach Co., So. Dakota. Authenticity guaranteed. A collector's quality Denversaurus osteoderm.
DK36 SIZE: 4-3/4" x 2-3/8" x 2" thick
Note - Adding 10 new Ankylosaur & Nodosaur osteoderms in August. Link to Ankylosaur fossils catalog.
Learn More - Denversaurus osteoderm$825.00
A Top Quality Denversaurus osteoderm (bony armor plate) with "bite marks" 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 osteoderm from a Nodosaur with a central ridge. The bone is excellent quality with excellent color and patina. Small crack fill on base only. No restoration. Legally collected on private land in the Lance Creek Fm., Niobrara Co., Wyoming. Authenticity guaranteed. A collector's quality Denversaurus osteoderm which is likely bitten.
DK37 SIZE: 4-1/4" x 3-1/4" x 1-1/2" thick
Note - Adding 10 new Ankylosaur & Nodosaur osteoderms in August. Link to Ankylosaur fossils catalog.
Learn More - Denversaurus osteoderm$495.00
A Top Quality Denversaurus 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 osteoderm from a Nodosaur with a central ridge. The bone is excellent quality with excellent color and patina. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Garfield Co., Montana. Authenticity guaranteed. A collector's quality Denversaurus osteoderm.
DK38 SIZE: 3-1/4" x 2-1/4" x 1-1/2" thick
Note - Adding 10 new Ankylosaur & Nodosaur osteoderms in August. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaur osteoderm$135.00
A Top Quality Ankylosaurus "button" 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 osteoderm from a juvenile Ankylosaur. The bone is excellent quality with excellent color and patina. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Garfield Co., Montana. Authenticity guaranteed. A collector's quality Ankylosaur osteoderm.
DK31 SIZE: 1-3/8" x 1-1/8"
Note - Adding 10 new Ankylosaur & Nodosaur osteoderms in August. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaur osteoderm$125.00
A Top Quality Ankylosaurus "button" 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 osteoderm from a juvenile Ankylosaur. The bone is excellent quality with excellent color and patina. No repair or restoration. Legally collected on private land in the Hell Creek Fm., Garfield Co., Montana. Authenticity guaranteed. A collector's quality Ankylosaur osteoderm.
DK32 SIZE: 1-1/8" x 1-3/16"
Note - Adding 10 new Ankylosaur & Nodosaur osteoderms in August. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$0.00
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$0.00
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$0.00
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$0.00
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 - Nodosaur Body Spike - Judith River$0.00
An ultra rare, Top Quality Judith River Nodosaur body spike from the late Cretaceous of North America. AJune Fossil of the Month. The Campanian age Nodosaurs grew to 22 feet and 6000 pounds, and a body covered with this bony armor with body spikes along the edge of the body (see Edmontonia photo). Edmontonia is the named Two Medicine Fm. Nodosaur which is a good proxy to the currently undescribed Judith River Fm. Nodosaur. The bone is excellent quality with excellent color / patina. A complete side armor spike from a large Nodosaur. ~72 MYA. Note - there is less than 10% professional restoration in small areas for aesthetic purposes at the base. Legally collected on private land in the Judith River Fm., Hill Co., Montana. Authenticity guaranteed. An ultra rare collector's quality Ankylosaur body spike. I have only seen two of the spikes available in the market place. Incredibly rare and super cool. It was found in the 1940s!
DK29 BoP SIZE: 5-1/2" (Base: 3" x 2-3/8")
Note - Adding 9 new Ankylosaur - Nodosaur fossils in Juine 2024. Link to Ankylosaur fossils catalog.
Learn More - Ankylosaurus$0.00
A rare, Top Quality Ankylosaurus magniventris tooth from the late Cretaceous of northern North America. Ankylosaurus magniventris was the largest Ankylosaur which grew to 30 feet and 17000 pounds. The enamel is excellent quality with excellent color / patina. Partial root. No cracks or restoration. Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Authenticity guaranteed. A collector's quality Ankylosaur tooth. Note - tooth comes with the gem case pictured.
DK15 SIZE: 1/4"
Note - Adding 20 new Ankylosaur - Nodosaur fossils in July 2018. Link to Ankylosaur fossils catalog.
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