Coelophysis vs Pachycephalosaurus

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

Side-by-Side Comparison

Thuộc tính Coelophysis Pachycephalosaurus
Tên khoa học Coelophysis bauri Pachycephalosaurus wyomingensis
Phân loại Theropoda Pachycephalosauria
Kỷ Triassic Late Cretaceous Late
Chế độ ăn Carnivore Herbivore
Chiều dài 3.0 m 4.5 m
Height 1.0 m 1.8 m
Cân nặng 20 kg 450 kg
Năm khám phá 1889 1943
Địa điểm khám phá Ghost Ranch, New Mexico, USA Montana, USA
Được đặt tên bởi Edward Drinker Cope Barnum Brown & Erich Schlaikjer

Size Comparison

Coelophysis 3.0 m

about the size of a human adult

Pachycephalosaurus 4.5 m

roughly the length of a large SUV

Weight Comparison

Coelophysis 20 kg

lighter than a human adult

Pachycephalosaurus 450 kg

about 6 adult humans

Timeline Comparison

Coelophysis
237,0 Mya Triassic Late (Mesozoic) 201,4 Mya
Pachycephalosaurus
100,5 Mya Cretaceous Late (Mesozoic) 66,0 Mya

Diet Comparison

Coelophysis

Carnivore

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

Pachycephalosaurus

Herbivore

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

Classification Comparison

Coelophysis

Clade: Saurischia

Group: Theropoda

(Beast feet)

Pachycephalosaurus

Clade: Ornithischia

Group: Pachycephalosauria

(Thick-headed lizards)

Did You Know?

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Pachycephalosaurus was about 1.5x longer than Coelophysis.

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Pachycephalosaurus weighed roughly 22x more than Coelophysis.

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Coelophysis was a carnivore while Pachycephalosaurus was a herbivore.

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Coelophysis lived during the Triassic Late while Pachycephalosaurus lived during the Cretaceous Late, separated by roughly 101 million years.

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Coelophysis was discovered 54 years earlier, in 1889.

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Coelophysis belonged to Theropoda while Pachycephalosaurus belonged to Pachycephalosauria.

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