The dilophosaurus existed approximately 193 million years ago, during the early Jurassic Period. These measured about 7 metres (23 ft) long and weighed about 400 kilograms.
The most distinguishing feature of the dilophosaurus was the rounded crests on its skull. These crests first appeared on the dilophosaurus but remained in later theropod species. The purpose of the crests has not been determined. Fossils of the animal have been found in China.
Dilophosaurus is derived from Greek words meaning two, crest, and lizard, which translates to two-crested lizard.
The design of the dilophosaurus teeth have led scientists to believe that it may not have been capable of taking down larger prey, as the back teeth in the upper jaw were weekly rooted.
The dilophosaurus is believed to have sat like a bird, in an upright position.
Some scientists believe that the dilophosaurus may have been a fish-eater. The design of its teeth and shape of its nostrils lends itself to the idea that its nostrils could have kept above water and its teeth would have been ideal for puncturing fish.
- Some scientists believe that the dilophosaurus ate smaller dinosaurs.
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