The Megalosaurus or “great lizard” was first discovered in 1824. It was a large meat eating dinosaur that lived in what is now Southern England about 166 million years ago. The Megalosaurus fossils that were t amongst the earliest to be found came from the Taynton Limestone Formation. This included the lower part of a femur that was originally described as the thighbone of a Roman war elephant and then later speculated to be a biblical giant.
However, in 1824 the Megalosaurus was given its name that it still has today and became the first dinosaur to be officially named and recognized as a dinosaur. For a while it was one of only three dinosaurs that were actually named and recognized as such.