Saurischian dinosaurs
Saurischian dinosaurs
Saurischian dinosaurs
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Coelurosaurs: Oviraptor<br />
• Name means “egg predator”… early discoveries of Oviraptor were<br />
near nests, which were thought to be Ceratopsian nests<br />
• Recent discoveries show the nests were Oviraptor nests, with eggs<br />
containing fossilized chicks<br />
Ornithomimids<br />
• “Ostrich” <strong>dinosaurs</strong>, because they resemble the body plan of an<br />
ostrich… long legs, long neck, fast runners<br />
Length: 2 m<br />
Mass: 30 kg<br />
Ornithomimus<br />
Late Cretaceous<br />
Length: 3.5 m<br />
Dromaeosaurs: Deinonychus<br />
• One of a group of vicious predators from the late Cretaceous<br />
• By late Cretaceous, theropods had become very specialized for<br />
hunting, becoming highly efficient killing machines<br />
Velociraptor<br />
• Made famous in “Jurassic Park”<br />
• The real velociraptor was only ~2 m long<br />
• Slightly larger than Deinonychus
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