Drag to rotate the Acrocanthosaurus, scroll or pinch to zoom, and click a body part - the head, an arm, the tail, or a leg - to read what fossils tell us about it. The panel beside the model carries the real figures.
Acrocanthosaurus 3D Viewer
This page renders an Acrocanthosaurus as a 3D model you can spin in the browser - drag to rotate, scroll or pinch to zoom, toggle a 1.8 m person beside it for scale, and click the head, an arm, the tail, or a leg to read a fact about that part.
Acrocanthosaurus atokensis was a large theropod from the Early Cretaceous of North America, roughly 125 to 100 million years ago. Its vertebrae bear unusually tall neural spines along the neck, back, and hips - researchers interpret those spines as anchoring a low muscular ridge along the dorsal line, not a tall sail like Spinosaurus. It was among the apex predators of its ecosystem in what is now the south-central United States.
J. Willis Stovall and Wann Langston named the genus in 1950. Specimen NCSM 14345 ("Fran") comes from the Antlers Formation of Oklahoma and is among the most complete skeletons known for the genus. Published length estimates center on about 11 to 11.5 m; mass estimates span about 4.4 to 8.4 tonnes across studies - this viewer uses about 6.2 t as a mid-range panel value within that range.
| Measure | Figure |
|---|---|
| Length | about 11-11.5 m (panel ~11.5 m) |
| Weight | about 4.4-8.4 t (panel ~6.2 t) |
| When it lived | about 125-100 Mya (Early Cretaceous) |
| Diet | Carnivore (apex predator) |
| Group | Large carcharodontosaurid theropod |
Everything runs on your device with WebGL, so the model works without an account and without sending anything to a server. The skin tone and pattern are an artistic reconstruction, because fossils do not preserve color or soft tissue; this model is not a fossil-accurate skeleton. For a sibling large theropod in the same cluster, see the Giganotosaurus 3D Viewer or the Allosaurus 3D Viewer.
Frequently Asked Questions
How big was Acrocanthosaurus?
Most published length estimates fall around 11 to 11.5 m. Mass estimates vary from about 4.4 to 8.4 tonnes depending on the reconstruction method; this viewer uses 11.5 m and 6.2 t as mid-range panel values within those ranges. Turn on the human figure to compare scale against a 1.8 m person.
What were the high neural spines for?
The tall neural spines along the neck, back, and hips likely anchored neck and back muscles, creating a low ridge along the dorsal line. They may also have had a display role, but fossils do not preserve the soft-tissue outline, so the exact look remains interpretive.
How is Acrocanthosaurus different from a Spinosaurus sail?
Spinosaurus is famous for a very tall, sail-like dorsal structure supported by elongated neural spines. Acrocanthosaurus spines are elevated but generally interpreted as supporting muscle and a low ridge rather than a thin, high sail. The two animals lived in different places and times and are not close relatives.
When and where was Acrocanthosaurus found?
In the Early Cretaceous, about 125 to 100 million years ago, in what is now Oklahoma and Texas (Antlers and Twin Mountains formations). Stovall and Langston named the genus in 1950; the well-known specimen NCSM 14345 ("Fran") was excavated from the Antlers Formation in Oklahoma.
Is the model scientifically accurate?
The proportions follow published length and mass ranges, but the skin color, the low dorsal ridge, 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. The 3D engine loads once and is then cached.