Guide Note

Ultrasaurus is debated genus of dinosaur. It is one of the largest known species of herbivores. Ultrasaurus lived in the late Jurassic period, and featured a long neck and whip-like tail.

Fast Facts

1. Name means: "Ultra Lizard"
2. Naming credit: James Jensen
3. Classification:
   1. Order: Saurischia
   2. Sub-order: Sauropodomorpha
   3. Genus: Ultrasauros
4. Period: Jurassic
5. Diet: Herbivore
6. Estimated height: 50 feet
7. Estimated length: 82-100+ feet
8. Estimated weight: 55 to 130 tons¹
9. Renamed "Ultrasauros" because "Ultrasaurus" had already been taken
10. Fossils found in western Colorado, America

Because of the limited fossil evidence, some researchers question whether or not what is named the Ultrasaurus is in fact the collected remains of Brachiosaurus and Supersaurus specimens. Both of these dinosaurs were gigantic four-legged plant eating herbivores with a long neck and long tail.¹