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Denversaurus osteoderm

SKU

DK35

In stock

$7,500.00

Overview

A rare, Top Quality pair of associated Denversaurus osteoderms (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. Two complete, associated osteoderms from the Nodosaur neck area (see photo of the HMNS Denversaurus skeleton). One osteoderm is a keel type and the second osteoderm is a peripherial edge type. You won't see these osteoderms very often. The bone is very good quality with great color and patina. Some crack fill. No restoration. Legally collected on private land in the Lance Creek Fm., Converse Co., Wyoming. Authenticity guaranteed. An incredible collector's quality Denversaurus osteoderm pair. Specimen comes with a custom steel stand. Note - Osteoderm on stand weighs 9 lbs. An international shipping surcharge will be added to "free shipping".

DK35 SIZE: 8-1/4" x 6" x 4-1/4" thick ; Height on stand = 9-3/4"

Note - Adding 10 new Ankylosaur & Nodosaur osteoderms in August. Link to Ankylosaur fossils catalog.

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Details

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.

Species include the following –

Ankylosaurus magniventris – the largest Ankylosaur, Hell Creek Formation; 67-66 mya

Denversaurus schlessmani - the Hell Creek Fm. Nodosaur ; 67-66 mya

Euplocephalus tutus – an Ankylosaur, Judith River / Two Medicine / Horseshoe Canyon Fm.; 76-75 mya

Edmontonia rugosidens – a Nodosaur, Judith River / Two Medicine / Horseshoe Canyon Fm.; 77-69 mya

Zuul crurivastator - an Ankylosaur, Judith River Fm. - Montana; 80 -75 mya