Deinonychus vs Irritator

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

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Side-by-Side Comparison

Propriété Deinonychus Irritator
Nom scientifique Deinonychus antirrhopus Irritator challengeri
Classification Dromaeosauridae Spinosauridae
Période Cretaceous Early Cretaceous Early
Alimentation Carnivore Piscivore
Longueur 3.4 m 8.0 m
Height 0.9 m 2.5 m
Poids 73 kg 1.0 t
Année de découverte 1969 1996
Lieu de découverte Montana, USA Santana Formation, Brazil
Nommé par John Ostrom David Martill et al.
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Size Comparison

Deinonychus 3.4 m

about the size of a human adult

Irritator 8.0 m

roughly the length of a large SUV

Weight Comparison

Deinonychus 73 kg

about 1 adult humans

Irritator 1.0 t

comparable to 1.0 small cars

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Timeline Comparison

Deinonychus
145,0 Mya Cretaceous Early (Mesozoic) 100,5 Mya
Irritator
145,0 Mya Cretaceous Early (Mesozoic) 100,5 Mya

Deinonychus and Irritator both lived during the Cretaceous Early period and may have shared the same habitats.

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Diet Comparison

Deinonychus

Carnivore

Deinonychus was a meat-eating predator, hunting other animals for food.

Irritator

Piscivore

Irritator was a fish-eater, specialized in catching aquatic prey.

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Classification Comparison

Deinonychus

Clade: Theropoda

Group: Dromaeosauridae

(Raptors)

Irritator

Clade: Theropoda

Group: Spinosauridae

(Spine lizards)

Both dinosaurs share a common ancestor within the Theropoda clade.

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Did You Know?

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Irritator was about 2.4x longer than Deinonychus.

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Irritator weighed roughly 14x more than Deinonychus.

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Deinonychus was a carnivore while Irritator was a piscivore.

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Both dinosaurs lived during the Cretaceous Early period and may have coexisted.

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Deinonychus was discovered 27 years earlier, in 1969.

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Deinonychus belonged to Dromaeosauridae while Irritator belonged to Spinosauridae.

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