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"Merosaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Jurassic ( Sinemurian stage, around 190 million years ago). It was a tetanuran theropod which lived in what is now England. The type species, "Merosaurus newmani", was coined by paleontologists Samuel Welles, H.P. Powell, and A. Pickering in 1995, and is based solely on some leg bones (a knee joint) once thought to belong to Scelidosaurus.