Regnosaurus was a Huayangosaurid Stegosaurid dinosaur. It's jaws were very similar to Huanyangosaurus jaws. People thought that this was an Iguanodontid, Scelidosaurid, Stegosaurid (but then it also included Ankylosaurids), Hylaeosaurus synonym and Sauropod. It was found to have been a Stegosaurid in 1993.

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