Hypsilophodon
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Hypsilophodon is a neornithischian dinosaur genus from the Early Cretaceous period of England. It has traditionally been considered an early member of the group Ornithopoda, but recent research has put this into question.
Illustration of the complete Mantell-Bowerbank block. Mantell had received the bottom half, and Bowerbank the top.
Fox's skull, the holotype NHMUK PV R 197
Palaeontologist Thomas H. Huxley, who named Hypsilophodon