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Pick two dinosaurs to see them side by side. Ranges are shown as published; missing values say Unknown.

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Tom Parker, CC BY-SA 4.0, via Wikimedia Commons (unmodified except resizing) · CC BY-SA 4.0

Brontosaurus excelsus

Period: Jurassic· Kimmeridgian
Age: 154.8–143.1 Ma
Diet: Herbivore
Length: 21–23 m
Height: 3.4–4 m
Mass: 15–20 t
Found in: Morrison Formation, Wyoming, Colorado, Utah, United States
Classification: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Diplodocoidea › Diplodocidae › Apatosaurinae › Brontosaurus › Brontosaurus excelsus
Year described: 1879

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