Bashanosaurus primitivus: A new species of Stegosaur from the Middle Jurassic of Chongqing Municipality, China.
[sciencythoughts.blogspot.com]
The Stegosaurs were a distinctive group of Ornithischian Dinosaurs whose fossils are known from the Middle Jurassic to the Early Cretaceous, and which are distinctive for the presence of a double row of plates or spines which run along the back from the neck to the tip of the spine. The earliest known Stegosaurs appear in the Middle Jurassic in Europe, China, Argentina, and Morocco, a distribution which implies the group emerged some time before the oldest fossils we know.
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