Dinosaur time gap

Did Brachiosaurus and Dimetrodon live at the same time?

No. Brachiosaurus (Late Jurassic) and Dimetrodon (Cisuralian) are separated by 120 million years.

Brachiosaurus to you: 143 million years.

Brachiosaurus

Late Jurassic · 155–143 million years ago

Named by Riggs, 1903

Fossils from United States, Tanzania, Zimbabwe, 1 more

Silhouette by Amy Beauvois

Dimetrodon

Cisuralian · 283–274 million years ago

Named by Cope, 1878

Fossils from United States, Canada, Germany

Dimetrodon is not a dinosaur.

Silhouette by Will Toosey

Dig from Dimetrodon down to Brachiosaurus →

Between Dimetrodon and Brachiosaurus

  • Helicoprion Guadalupian · 274–267 million years ago
  • Kwanasaurus Late Triassic · 227–201 million years ago
  • Plateosaurus Late Triassic · 227–206 million years ago
  • Ichthyosaurus Early Jurassic · 201–200 million years ago
  • Megapnosaurus Early Jurassic · 201–193 million years ago
  • Lufengosaurus Early Jurassic · 200–193 million years ago
  • Yunnanosaurus Early Jurassic · 200–193 million years ago
  • Megalosaurus Middle Jurassic · 168–165 million years ago

Fun Facts

  • Dimetrodon is known from 94 fossil sites.
  • Dimetrodon is not a dinosaur. It was gone 37 million years before the oldest dinosaur here.

Did they live at the same time?

Every animal you can pick →