Denversaurus in 3D - click head, the armored body, or a leg for a fact (full controls on the Dinosaurs 3D hub).
Denversaurus was a heavily armored nodosaurid from the very end of the Cretaceous in South Dakota's Hell Creek Formation - turn on the human figure to see how a person compares to its broad, plated body.
Denversaurus 3D Viewer
Drag to spin the Denversaurus schlessmani model below, zoom in close, and click the head, the armored body, or a leg to read a fact about that part (full controls on the Dinosaurs 3D hub).
The holotype was first described in 1986 by Kenneth Carpenter and Bakker as a nodosaurid specimen tentatively assigned to the genus Edmontonia. In 1988, Robert T. Bakker separated it into its own genus and species, Denversaurus schlessmani, naming it for the Denver Museum of Natural History and for Lee E. Schlessman, a major museum benefactor. The fossil comes from the Hell Creek Formation in South Dakota and dates to the very end of the Cretaceous, about 68 to 66 million years ago - the same rocks that produced Triceratops and Tyrannosaurus rex. In that ecosystem Denversaurus made its living as a low-browsing herbivore. Its diet was plants rather than prey: a broad head carried close to the ground let it crop the low-growing vegetation within reach, instead of the higher foliage that taller plant-eaters could strip. Feeding stayed at ground level, the quiet grazing routine of an armored plant-eater.
Like the already-shipped Panoplosaurus, Denversaurus had no club at the end of its tail and no prominent body spikes - just dense armor plates and a broad, blunt skull, though its skull was proportionally wider and more triangular than Panoplosaurus. Some paleontologists still argue that Denversaurus is really just a species of Edmontonia rather than a separate genus, a debate that remains unresolved; this page follows the traditional Gregory S. Paul (2010) size estimate while noting that uncertainty directly.
Switch on the 1.8 m human marker and that roughly 6 m body runs to more than three times a person from nose to tail, which makes the low, broad, heavily armored nodosaurid build - long and tank-like rather than tall - much easier to judge against a figure than from the length number alone.
| Measure | Figure |
|---|---|
| Length | about 6 m (20 ft) - Gregory S. Paul, 2010 estimate |
| Weight | about 3 t (3,000 kg) |
| When it lived | about 68-66 Mya (Late Cretaceous, Maastrichtian) |
| Diet | Herbivore - low-growing plants |
| Described | 1986 (Carpenter and Bakker, as Edmontonia sp.); separated into its own genus by Robert T. Bakker, 1988, Hell Creek Formation, South Dakota |
The viewer paints an instant built-in shape first, then, where your browser and connection allow, quietly upgrades it to a more detailed free-licensed 3D model that shows the armored skull and osteoderm-studded back the simple starting body only roughs in; if that larger file cannot load, the fast built-in version stays in place so the page never stalls or breaks. For a sibling nodosaurid on this site, see the Panoplosaurus 3D Viewer.
How it fits in time
- Sitting near the top of the Hell Creek rock, Denversaurus is one of the last nodosaurids known anywhere before the end-Cretaceous extinction ended the age of dinosaurs.
- Its site sibling Panoplosaurus lived millions of years earlier, in the Campanian-age Dinosaur Park Formation, so the two armored dinosaurs on this site bracket very different chapters of the Cretaceous.
- See also Ankylosaurus, another armored ankylosaur on this site.
Frequently Asked Questions
How big was Denversaurus?
Gregory S. Paul's 2010 estimate puts it at about 6 m (20 ft) long and roughly 3 tonnes (3,000 kg), making it one of the largest known nodosaurids. Turn on the human figure in the viewer to compare scale against a 1.8 m person.
Did Denversaurus have a tail club like Ankylosaurus?
No. Denversaurus had no club at the end of its tail and no prominent spikes, similar to the already-shipped Panoplosaurus. It relied instead on dense armor plates and a broad, blunt skull.
Is Denversaurus a real, separate dinosaur genus?
That is genuinely debated. The holotype was first described in 1986 as a nodosaurid specimen tentatively assigned to the genus Edmontonia. Robert T. Bakker split it into its own genus and species, Denversaurus schlessmani, in 1988, but some paleontologists still argue it should be folded back into Edmontonia. This page follows Bakker's original separate-genus naming while noting the disagreement.
When and where was it found?
The holotype comes from the Hell Creek Formation in South Dakota, part of the very end of the Cretaceous, about 68 to 66 million years ago - the same rock formation that produced Triceratops and Tyrannosaurus rex.
Is the model scientifically accurate?
The proportions follow published length and mass estimates, but the exact armor plate pattern, skin color, and soft-tissue outline are an artistic reconstruction - fossils preserve bone, not color or muscle shape. This model is not a fossil-accurate skeleton.
Do I need to install anything to view it?
No. The model renders in your browser with WebGL - no app, no account, and nothing about your visit is sent to a server. A free-licensed glTF model swaps in for the procedural body after first paint.