Plateosaurus

 The Plateosaurus was discovered 1834 Johann Friedrich Engelhardt. It was actually the fifth dinosaur to be named! It was a Prosauropod. Not a Sauropod.  Sauropods only walk on four legs. Prosauropods walk on four and two legs, but still have long necks, otherwise Prosauropods would just be Hadrosaurs. It lived about 214 million to 204 million years ago, in the Triassic Period. By the time 2011 came around, two species were discovered. Plateosaurus Engelhardti. And Plateosaurus Gracilis. It lived in Northern parts of Europe.

https://dinosaurpictures.org/Plateosaurus-pictures