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Monolophosaurus

Dinosaur
Monolophosaurus is an extinct genus of tetanuran theropod dinosaur from the Middle Jurassic Shishugou Formation in what is now Xinjiang, China. It was named for the single crest on top of its skull. Monolophosaurus was a mid-sized theropod at... Wikipedia
Mass: 1,000 lbs
Lived: 166.1 million years ago - 163.5 million years ago (Callovian)
Length: 18 ft.