Brachiosaurus vs Pachycephalosaurus
A detailed side-by-side comparison of Brachiosaurus and Pachycephalosaurus, covering size, diet, classification, geologic period, and discovery history.
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| Property | Brachiosaurus | Pachycephalosaurus |
|---|---|---|
| Scientific Name | Brachiosaurus altithorax | Pachycephalosaurus wyomingensis |
| Classification | Sauropoda | Pachycephalosauria |
| Period | Jurassic Late | Cretaceous Late |
| Diet | Herbivore | Herbivore |
| Length | 26.0 m | 4.5 m |
| Height | 13.0 m | 1.8 m |
| Weight | 56.0 t | 450 kg |
| Discovery Year | 1903 | 1943 |
| Discovery Location | Grand River Valley, Colorado, USA | Montana, USA |
| Named By | Elmer S. Riggs | Barnum Brown & Erich Schlaikjer |
Size Comparison
about as long as 5 cars end-to-end
roughly the length of a large SUV
Weight Comparison
heavier than 9 African elephants
about 6 adult humans
Timeline Comparison
Diet Comparison
Brachiosaurus
HerbivoreBrachiosaurus was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.
Pachycephalosaurus
HerbivorePachycephalosaurus was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.
Classification Comparison
Brachiosaurus
Pachycephalosaurus
Did You Know?
Brachiosaurus was about 5.8x longer than Pachycephalosaurus.
Brachiosaurus weighed roughly 124x more than Pachycephalosaurus.
Both Brachiosaurus and Pachycephalosaurus were herbivores.
Brachiosaurus lived during the Jurassic Late while Pachycephalosaurus lived during the Cretaceous Late, separated by roughly 44 million years.
Brachiosaurus was discovered 40 years earlier, in 1903.
Brachiosaurus belonged to Sauropoda while Pachycephalosaurus belonged to Pachycephalosauria.
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