Postosuchus in 3D - click the head, the body, or the tail for a fact (full controls on the Dinosaurs 3D hub).
Postosuchus was a rauisuchian archosaur, not a dinosaur - a crocodile-line predator from the Late Triassic with a deep boxy skull and legs tucked more under the body than a sprawled crocodilian. Researchers still debate whether it moved mainly on four legs or two; this model shows a cautious quadrupedal reconstruction.
The measurements in the panel follow published estimate ranges because sources disagree.
Postosuchus 3D Viewer
Click and drag the Postosuchus model to spin it, zoom for a closer look, and click a body part to read a fact (the Dinosaurs 3D hub covers all controls).
Postosuchus was a rauisuchian pseudosuchian, a crocodile-line archosaur that lived in the Late Triassic, roughly 227 to 208 million years ago, in what is now Texas and North Carolina. It was not a dinosaur - it belongs to a separate branch of archosaurs - but it was among the largest predators of its time, tens of millions of years before the first tyrannosaurs. Sankar Chatterjee described it in 1985 from fossils found at Post Quarry, Texas.
Published length estimates span about 4 to 7 m and mass estimates span about 250 to 1000 kg because complete skeletons are rare and reconstructions differ. This page uses about 5.5 m and about 500 kg as its panel baseline and shows the wider ranges here because sources disagree. Whether Postosuchus walked mainly on four legs or two remains an open research question; the procedural model shows a cautious quadrupedal stance and the page says so plainly.
| Measure | Figure |
|---|---|
| Length | about 4-7 m (panel baseline about 5.5 m) |
| Weight | about 250-1000 kg (panel baseline about 500 kg) |
| When it lived | about 227-208 million years ago (Late Triassic) |
| Group | Rauisuchian pseudosuchian, not a dinosaur |
| Diet | Carnivore |
Postosuchus is not related to the similarly honest Dimetrodon 3D Viewer - one is a Triassic archosaur, the other an earlier sail-backed synapsid - but both share this site's approach of labeling non-dinosaurs clearly.
Frequently Asked Questions
Was Postosuchus a dinosaur?
No. Postosuchus was a rauisuchian pseudosuchian - a crocodile-line archosaur from the Late Triassic - not a dinosaur. This viewer includes it because it is one of the most-searched Triassic predators and is often confused with dinosaurs.
How big was Postosuchus?
Published estimates span about 4 to 7 m long and about 250 to 1000 kg because complete skeletons are rare. This page uses about 5.5 m and about 500 kg as its panel baseline. Turn on the human figure to compare with a person.
Did Postosuchus walk on two legs or four?
Researchers still debate that. Some reconstructions favor a mainly bipedal stance; others a quadrupedal one. This model shows a cautious quadrupedal reconstruction and does not claim the debate is settled.
Is the model scientifically accurate?
The proportions follow published fossil reconstructions - a deep boxy skull, a raised trunk, and legs tucked more under the body than a sprawled crocodilian - but the skin color and pattern are an artistic reconstruction. Fossils preserve bone, not soft tissue or color. This model is not a fossil-accurate skeleton.
Where and when was Postosuchus found?
Fossils come from the Late Triassic Post Quarry in Texas and from North Carolina. Sankar Chatterjee described the genus in 1985. It lived roughly 227 to 208 million years ago, before the first large theropod dinosaurs.
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. When available, a free-licensed glTF model may swap in after first paint.