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Temporal range: Late Triassic – Early Jurassic
Dilophosaurus wetherilli
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Order: Saurischia
Suborder: Theropoda
Family: Dilophosauridae
Madsen & Welles, 2000

The Dilophosauridae ("double-ridged lizards") is a family of carnivorous theropod dinosaurs, possibly belonging to the Ceratosauria. The only three members are Dilophosaurus (North America, Asia), Dracovenator (Africa) and Sinosaurus (Asia) which all lived from the Late Triassic to the Early Jurassic. All five of them also have crests. Perutyrannus, Shuangbaisaurus and Zupaysaurus possibly also belong to this group.

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