Megalosaurus is thought to be the first dinosaur described in scientific literature. But based on a fossil uncovered in the seventeenth century, it could have been known by a different name.

In the mid-1600s, a fossil bone was acquired by Dr Robert Plot, the first keeper of Oxford's Ashmolean Museum. He noted that it looked almost exactly like the lower part of a human femur. He included an illustration of the peculiar fossil in his 1677 book The Natural History of Oxford-shire - but the piece lacked a name.

The fossil was uncovered in the Oxfordshire parish of Cornwell. Although Plot didn't detail the rock type that the fossil was found in, quarries in that part of the UK consist of limestone dating to the Mid Jurassic.

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