English: Baiyinosaurus is a basal stegosaurian dinosaur that lived about 165 million years ago in the Middle Jurassic of what is now China. Typical of stegosaurs, it was a quadrupedal herbivore with two rows of spikes down its back. Though not preserved in the fossil record, it is likely that Baiyinosaurus had a large spike protruding backwards from its shoulder. Baiyinosaurus is an early diverging stegosaur, and its anatomy shows some transitional features between basal thyreophorans and its more derived relatives.
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Captions
Baiyinosaurus: "Baiyin lizard" Middle Jurassic, Asia