Brachiosaurus vs Stegosaurus

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

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Side-by-Side Comparison

Propiedad Brachiosaurus Stegosaurus
Nombre cientรญfico Brachiosaurus altithorax Stegosaurus stenops
Clasificaciรณn Sauropoda Stegosauria
Perรญodo Jurassic Late Jurassic Late
Dieta Herbivore Herbivore
Longitud 26.0 m 9.0 m
Height 13.0 m 4.0 m
Peso 56.0 t 5.0 t
Aรฑo de descubrimiento 1903 1877
Lugar de descubrimiento Grand River Valley, Colorado, USA Morrison, Colorado, USA
Nombrado por Elmer S. Riggs Othniel Charles Marsh
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Size Comparison

Brachiosaurus 26.0 m

about as long as 5 cars end-to-end

Stegosaurus 9.0 m

roughly the length of a large SUV

Weight Comparison

Brachiosaurus 56.0 t

heavier than 9 African elephants

Stegosaurus 5.0 t

about the weight of 0.8 elephants

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Timeline Comparison

Brachiosaurus
161,5 Mya Jurassic Late (Mesozoic) 145,0 Mya
Stegosaurus
161,5 Mya Jurassic Late (Mesozoic) 145,0 Mya

Brachiosaurus and Stegosaurus both lived during the Jurassic Late period and may have shared the same habitats.

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Diet Comparison

Brachiosaurus

Herbivore

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

Stegosaurus

Herbivore

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

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Classification Comparison

Brachiosaurus

Clade: Sauropodomorpha

Group: Sauropoda

(Lizard feet)

Stegosaurus

Clade: Thyreophora

Group: Stegosauria

(Plated dinosaurs)

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Diferencias clave

  • Both lived in the Late Jurassic Morrison Formation of North America and were true contemporaries.
  • Brachiosaurus (26 m, ~56,000 kg) was enormous compared to Stegosaurus (9 m, ~5,000 kg).
  • Stegosaurus was a low-browsing herbivore; Brachiosaurus reached vegetation over 9 meters high.
  • Stegosaurus used its thagomizer tail for active defense; Brachiosaurus likely relied on its size for protection.
  • Stegosaurus had one of the smallest brains relative to body size of any dinosaur; Brachiosaurus had a proportionally small brain as well.
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Did You Know?

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Brachiosaurus was about 2.9x longer than Stegosaurus.

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Brachiosaurus weighed roughly 11x more than Stegosaurus.

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Both Brachiosaurus and Stegosaurus were herbivores.

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Both dinosaurs lived during the Jurassic Late period and may have coexisted.

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Stegosaurus was discovered 26 years earlier, in 1877.

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Brachiosaurus belonged to Sauropoda while Stegosaurus belonged to Stegosauria.

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Compare With Other Dinosaurs

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