Gallimimus vs Ornithomimus
A detailed side-by-side comparison of Gallimimus and Ornithomimus, covering size, diet, classification, geologic period, and discovery history.
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| Property | Gallimimus | Ornithomimus |
|---|---|---|
| Scientific Name | Gallimimus bullatus | Ornithomimus edmontonicus |
| Classification | Ornithomimosauria | Ornithomimosauria |
| Period | Cretaceous Late | Cretaceous Late |
| Diet | Omnivore | Omnivore |
| Length | 6.0 m | 3.8 m |
| Height | 1.9 m | 1.4 m |
| Weight | 440 kg | 170 kg |
| Discovery Year | 1972 | 1890 |
| Discovery Location | Gobi Desert, Mongolia | Alberta, Canada |
| Named By | Rinchen Barsbold et al. | Othniel Charles Marsh |
Size Comparison
Gallimimus
6.0 m
roughly the length of a large SUV
Ornithomimus
3.8 m
about the size of a human adult
Weight Comparison
Gallimimus
440 kg
about 6 adult humans
Ornithomimus
170 kg
about 2 adult humans
Timeline Comparison
Gallimimus
Ornithomimus
Gallimimus and Ornithomimus both lived during the Cretaceous Late period and may have shared the same habitats.
Diet Comparison
Gallimimus
OmnivoreGallimimus had an omnivorous diet, consuming both plants and small animals.
Ornithomimus
OmnivoreOrnithomimus had an omnivorous diet, consuming both plants and small animals.
Classification Comparison
Gallimimus
Ornithomimus
Both dinosaurs share a common ancestor within the Ornithomimosauria clade.
Key Differences
- Gallimimus (6 m, ~440 kg) was roughly twice the size of Ornithomimus (3.8 m, ~170 kg), but both were ornithomimosaurs.
- Both had toothless beaks, long necks, and ostrich-like body plans adapted for speed and omnivory.
- Ornithomimus adults had feathered wing-like arm structures for display or brooding; Gallimimus feathering details are less certain.
- Gallimimus lived in the Gobi Desert of Mongolia; Ornithomimus lived in Late Cretaceous North America.
- Gallimimus is featured in the iconic herd-running scene in Jurassic Park, which accurately depicts its speed.
Did You Know?
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Gallimimus was about 1.6x longer than Ornithomimus.
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Gallimimus weighed roughly 3x more than Ornithomimus.
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Both Gallimimus and Ornithomimus were omnivores.
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Both dinosaurs lived during the Cretaceous Late period and may have coexisted.
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Ornithomimus was discovered 82 years earlier, in 1890.
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Both belong to the Ornithomimosauria clade, making them relatively close relatives.
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