Coelophysis vs Pachycephalosaurus
A detailed side-by-side comparison of Coelophysis and Pachycephalosaurus, covering size, diet, classification, geologic period, and discovery history.
Side-by-Side Comparison
| Property | Coelophysis | Pachycephalosaurus |
|---|---|---|
| Scientific Name | Coelophysis bauri | Pachycephalosaurus wyomingensis |
| Classification | Theropoda | Pachycephalosauria |
| Period | Triassic Late | Cretaceous Late |
| Diet | Carnivore | Herbivore |
| Length | 3.0 m | 4.5 m |
| Height | 1.0 m | 1.8 m |
| Weight | 20 kg | 450 kg |
| Discovery Year | 1889 | 1943 |
| Discovery Location | Ghost Ranch, New Mexico, USA | Montana, USA |
| Named By | Edward Drinker Cope | Barnum Brown & Erich Schlaikjer |
Size Comparison
about the size of a human adult
roughly the length of a large SUV
Weight Comparison
lighter than a human adult
about 6 adult humans
Timeline Comparison
Diet Comparison
Coelophysis
CarnivoreCoelophysis was a meat-eating predator, hunting other animals for food.
Pachycephalosaurus
HerbivorePachycephalosaurus was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.
Classification Comparison
Coelophysis
Pachycephalosaurus
Did You Know?
Pachycephalosaurus was about 1.5x longer than Coelophysis.
Pachycephalosaurus weighed roughly 22x more than Coelophysis.
Coelophysis was a carnivore while Pachycephalosaurus was a herbivore.
Coelophysis lived during the Triassic Late while Pachycephalosaurus lived during the Cretaceous Late, separated by roughly 101 million years.
Coelophysis was discovered 54 years earlier, in 1889.
Coelophysis belonged to Theropoda while Pachycephalosaurus belonged to Pachycephalosauria.
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