Supersaurus was one of the longest dinosaurs yet discovered, with estimates commonly reaching about 33 to 39 meters from head to tail. It lived during the Late Jurassic Period, about 153 million years ago, in what is now western North America. As a sauropod, it had a tiny head, long neck, huge body, column-like legs, and a long whip-like tail.
Studying Supersaurus helps paleontologists understand how land animals could grow to extreme sizes and still move, feed, and survive.
Key Facts
- Estimated length: about 33 to 39 m, making Supersaurus one of the longest known dinosaurs.
- Time period: Late Jurassic, about 153 million years ago.
- Group: Sauropoda, the long-necked, plant-eating dinosaurs.
- Approximate mass estimates vary, but many studies place Supersaurus around 30,000 to 40,000 kg.
- Speed formula for fossil trackways: speed = distance ÷ time, but exact Supersaurus speed is not directly known.
- Scale comparison: if Supersaurus was 36 m long and a school bus is 12 m long, Supersaurus was 36 ÷ 12 = 3 bus lengths.
Vocabulary
- Sauropod
- A sauropod is a large plant-eating dinosaur with a long neck, long tail, large body, and four sturdy legs.
- Fossil
- A fossil is preserved evidence of ancient life, such as bone, tooth, footprint, or plant material.
- Vertebra
- A vertebra is one of the bones that forms the backbone and supports the neck, body, and tail.
- Paleontology
- Paleontology is the scientific study of ancient life using fossils and the rocks that contain them.
- Morrison Formation
- The Morrison Formation is a Late Jurassic rock layer in western North America that has produced many famous dinosaur fossils.
Common Mistakes to Avoid
- Calling Supersaurus the heaviest dinosaur is wrong because its strongest claim is extreme length, while other sauropods may have been heavier.
- Assuming one fossil gives the entire animal size is wrong because paleontologists often estimate total length from partial skeletons and comparisons with close relatives.
- Drawing Supersaurus with a dragging tail is wrong because sauropod tails were generally held off the ground, as shown by anatomy and the lack of continuous tail drag marks in most trackways.
- Thinking all long-necked dinosaurs lived at the same time is wrong because sauropods existed across many millions of years and different species belonged to different periods and ecosystems.
Practice Questions
- 1 If Supersaurus was 36 m long and a human is 1.8 m tall, how many human heights equal the dinosaur's length?
- 2 A museum model of Supersaurus is built at a scale of 1:20. If the real animal was 38 m long, how long should the model be in meters?
- 3 Explain why paleontologists compare Supersaurus bones with bones from related sauropods when estimating its full body length.