Ankylosaurus vs Eoraptor

A detailed side-by-side comparison of Ankylosaurus and Eoraptor, covering size, diet, classification, geologic period, and discovery history.

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Side-by-Side Comparison

Property Ankylosaurus Eoraptor
Scientific Name Ankylosaurus magniventris Eoraptor lunensis
Classification Ankylosauria Saurischia
Period Cretaceous Late Triassic Late
Diet Herbivore Omnivore
Length 10.0 m 1.0 m
Height 1.7 m 0.3 m
Weight 6.0 t 10 kg
Discovery Year 1908 1993
Discovery Location Hell Creek Formation, Montana, USA Ischigualasto Formation, Argentina
Named By Barnum Brown Paul Sereno et al.
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Size Comparison

Ankylosaurus 10.0 m

about as long as 2 cars end-to-end

Eoraptor 1.0 m

smaller than a human child

Weight Comparison

Ankylosaurus 6.0 t

about the weight of 1.0 elephants

Eoraptor 10 kg

lighter than a human adult

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Timeline Comparison

Ankylosaurus
100.5 Mya Cretaceous Late (Mesozoic) 66.0 Mya
Eoraptor
237.0 Mya Triassic Late (Mesozoic) 201.4 Mya
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Diet Comparison

Ankylosaurus

Herbivore

Ankylosaurus was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.

Eoraptor

Omnivore

Eoraptor had an omnivorous diet, consuming both plants and small animals.

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Classification Comparison

Ankylosaurus

Clade: Thyreophora

Group: Ankylosauria

(Fused lizards)

Eoraptor

Group: Saurischia

(Lizard-hipped dinosaurs)

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Did You Know?

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Ankylosaurus was about 10.0x longer than Eoraptor.

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Ankylosaurus weighed roughly 600x more than Eoraptor.

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Ankylosaurus was a herbivore while Eoraptor was a omnivore.

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Ankylosaurus lived during the Cretaceous Late while Eoraptor lived during the Triassic Late, separated by roughly 171 million years.

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Ankylosaurus was discovered 85 years earlier, in 1908.

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Ankylosaurus belonged to Ankylosauria while Eoraptor belonged to Saurischia.

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