Dinosaur time gap

Did Dimetrodon and Smilodon live at the same time?

No. Dimetrodon (Cisuralian) and Smilodon (Pleistocene) are separated by 274 million years.

Smilodon to you: 0.0117 million years.

More time separated them than separates Smilodon from you.

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

Smilodon

Pleistocene · 0.129 million years ago until about 11,700 years ago

Named by Lund, 1841

Fossils from United States, Argentina, Brazil, 11 more

Smilodon is not a dinosaur.

Silhouette by Ivan Iofrida

Dig from Dimetrodon down to Smilodon →

Between Dimetrodon and Smilodon

  • Helicoprion Guadalupian · 274–267 million years ago
  • Dilophosaurus Early Jurassic · 200–184 million years ago
  • Camarasaurus Late Jurassic · 155–143 million years ago
  • Pterodactylus Late Jurassic · 149–145 million years ago
  • Carcharodontosaurus Late Cretaceous · 101–94 million years ago
  • Corythosaurus Late Cretaceous · 84–72 million years ago
  • Rhabdodon Late Cretaceous · 84–72 million years ago
  • Isisaurus Late Cretaceous · 72–66 million years ago

Fun Facts

  • Smilodon spans 0.1 million years of rock.
  • Smilodon is known from 130 fossil sites.
  • Smilodon is not a dinosaur.
  • 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 →