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Dilophosaurus wetherilli
General Information
Universe Real Life
Jurassic Park
Jurassic: The Hunted
Primal Carnage
Aliases Dilo
Classification Dilophosaurus wetherilli
Species Type Dilophosaurid
Homeworld Earth
Environment Southwestern US & China
Intelligence Non-sapient
Biochemistry Carbon-based lifeform
Biological Information
Reproduction Sexual; Lays leathery eggs
Average Height ~1.5 meters (6 ft)
Average Weight 500 kilograms (1,100 lb)
Average Length 7 meters (23 ft)
Locomotion Bipedal
Feeding Behavior Carnivorous
Lineage Information
Descendant(s) Venomous Dilophosaurus
Cultural Information
Alignment Neutral
Personality Aggressive
Sociocultral characteristics
Scientific Taxonomy
Planet Earth
Domain Eukaryota
Kingdom Animalia
Subkingdom Eumetazoa
Infrakingdom Bilateria
Superphylum Deuterostomia
Phylum Chordata
Subphylum Vertebrata
Infraphylum Gnathostomata
Superclass Tetrapoda
Class Reptiles
Subclass Archosauria
Infraclass Avemetatarsalia
Superorder Dinosauria
Order Saurischia
Suborder Eusaurischia
Infraorder Theropoda
Superfamily Neotheropoda
Family Dilophosauridae
Genus Dilophosaurus
Species wetherilli
Other Information
Status Extinct

Dilophosaurus (/daɪˌlɒfɵˈsɔrəs/ dy-lof-o-sawr-əs or /daɪˌloʊfɵˈsɔrəs/), meaning Double Crested Lizard, is a genus of theropod dinosaur from the Sinemurian stage of the Early Jurassic Period, about 193 million years ago. It is considered to be the very first large carnivorous dinosaur, measuring around 7 metres (23 ft) long and assumed to have weighed 500 kilograms (1,100 lbs). It is distinctly known from its two famous crests rounding above its skull that have made it famous.

Skin imprints seem to suggest that it had feathers but further study revealed these to be impressions of plant material.



The most distinctive characteristic of Dilophosaurus is the pair of rounded crests on its skull, made up of extensions of the nasal and lacrimal bones. These are considered to be too delicate for anything but display purposes, and studies done by Gay in 2005 show no indication of sexual dimorphism being present in the skeleton, though no mention was made involving possible crest variation. Dodson noted in 1997 that cranial crests first appear in Dilophosaurus and later in other theropods.

Dilophosaurus skull

A dilophosaurus skull.

The teeth of the genus are long, but have a fairly small base and expand basally. These teeth are comprised of 12 maxillary and up to 18 dentary, being smaller in the tip of the upper jaw. The second and third front teeth also feature serrations, which are absent in the first and fourth. Interestingly, there is a notch behind the first row of teeth, giving the creatures an almost crocodile-like appearance, in a manner similar to the putatively piscivorous spinosaurids.

Dilophosaurus Lineup

A size comparison between a human and two specimens of dilophosaurus wetherilli.

Although primitive in the terms of Tyrannosaurus rex or Allosaurus, it was actually a very advanced predator at the time. For one, the braincase was significant enough to bear a feature of the top side all that was absent in other known ceratosaurians.


Fossils of Dilophosaurus have been uncovered in Southwestern US (for instance, in the Navajo Indian Reservation, just west of Tuba City, Arizona) and possibly China.

Other breedsEdit

Venomous DilophosaurEdit

Venomous dilophosauruses have been noted, appearing in Isla Nublar's Jurassic Park off of South America. These were genetically altered using spitting cobra DNA, and may in fact be related to the much smaller spitting variety, which are also venomous yet possess a frill (which may or may not be shed as the creature matures and reaches sizes where it no longer needs to intimidate with a false size increase). Considering that this variety were 10 feet tall while the spitters on Jurassic Park were only 3 feet tall and 5 feet long, it seems like a fairly plausible answer.

Spitting DilophosaurEdit

Spitting JP Dilo

A spitting Dilo as seen within Jurassic Park.

Spitting dilophosauruses have been noted, appearing in Isla Nublar's Jurassic Park off of South America as well as a military-controlled island. While both of these groups seem to have been genetically altered using spitting cobra DNA, and may in fact be related to the much larger venomous variety, perhaps simply being younger members of the species.

Despite this, spitting dilos were also witnessed by former Navy Seal Craig Dylan, seemingly back in the Early Jurassic after traveling accidentally through a warp in the Bermuda Triangle. This breed was insular, appearing on the island as far as anyone knows.

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