Allosaurus vs Irritator

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

Side-by-Side Comparison

Thuộc tính Allosaurus Irritator
Tên khoa học Allosaurus fragilis Irritator challengeri
Phân loại Theropoda Spinosauridae
Kỷ Jurassic Late Cretaceous Early
Chế độ ăn Carnivore Piscivore
Chiều dài 9.7 m 8.0 m
Height 3.5 m 2.5 m
Cân nặng 2.3 t 1.0 t
Năm khám phá 1877 1996
Địa điểm khám phá Garden Park, Colorado, USA Santana Formation, Brazil
Được đặt tên bởi Othniel Charles Marsh David Martill et al.

Size Comparison

Allosaurus 9.7 m

roughly the length of a large SUV

Irritator 8.0 m

roughly the length of a large SUV

Weight Comparison

Allosaurus 2.3 t

comparable to 2.3 small cars

Irritator 1.0 t

comparable to 1.0 small cars

Timeline Comparison

Allosaurus
161,5 Mya Jurassic Late (Mesozoic) 145,0 Mya
Irritator
145,0 Mya Cretaceous Early (Mesozoic) 100,5 Mya

Diet Comparison

Allosaurus

Carnivore

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

Irritator

Piscivore

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

Classification Comparison

Allosaurus

Clade: Saurischia

Group: Theropoda

(Beast feet)

Irritator

Clade: Theropoda

Group: Spinosauridae

(Spine lizards)

Did You Know?

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Allosaurus weighed roughly 2x more than Irritator.

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Allosaurus was a carnivore while Irritator was a piscivore.

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Allosaurus lived during the Jurassic Late while Irritator lived during the Cretaceous Early, separated by roughly 0 million years.

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Allosaurus was discovered 119 years earlier, in 1877.

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Allosaurus belonged to Theropoda while Irritator belonged to Spinosauridae.

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