Dilophosaurus, an early large predatory dinosaur, roamed what is now North America approximately 186 to 195 million years ago during the Early Jurassic period. This bipedal carnivore is recognized for the distinctive pair of bony crests on its skull. It was a significant predator in its ecosystem, marking an important stage in the evolution of large theropods.
Key Dimensions of Dilophosaurus
Adult Dilophosaurus reached 20 to 23 feet (6 to 7 meters) in length. Its height at the hips typically ranged from 5.7 to 7.4 feet (1.75 to 2.25 meters). It weighed between 650 to 1,500 pounds (295 to 680 kilograms). These measurements are derived from the available fossil evidence, providing scientists with a robust understanding of its physical stature.
Putting Dilophosaurus Size into Perspective
To visualize the scale of Dilophosaurus, its length of 20 to 23 feet is comparable to a large school bus or two mid-sized cars parked end-to-end. Its height at the hip, about 6 to 7 feet, was comparable to a professional basketball player or a large brown bear. Its weight, 650 to 1,500 pounds, is similar to a large polar bear or a small adult elephant. This comparison highlights that while not the largest dinosaur, Dilophosaurus was a formidable creature in its environment.
Unraveling Dilophosaurus’s Size
Paleontologists determine Dilophosaurus’s size through fossilized skeletal remains. They analyze the length and circumference of major bones, such as the femur, to estimate overall body dimensions. Reconstructing the complete skeleton allows for a comprehensive understanding of the animal’s posture and approximate height and length.
Estimating weight and muscle mass from bone structure involves using leg bone circumferences, fleshed-out scale models, and analyzing leg bone lengths. While these methods provide reliable estimates, variations can occur depending on the completeness of the fossil record and the specific techniques employed. Scientists also consider growth stages, distinguishing juvenile and adult specimens to understand the full size potential.
Debunking Dilophosaurus Myths
Popular culture, especially the Jurassic Park franchise, has perpetuated inaccuracies about Dilophosaurus. The film depicts the dinosaur as significantly smaller than scientific estimates. In the movie, Dilophosaurus appears 3 to 4 feet tall and 5 to 6 feet long, considerably smaller than the real animal’s 20 to 23-foot length.
The film also introduced fictional abilities like a neck frill and venom-spitting, neither of which has any scientific basis. These creative liberties do not reflect the true characteristics of Dilophosaurus. The actual Dilophosaurus was a larger, agile predator that relied on its size and teeth for hunting, not venom or a frill.