Miragaia longicollum is a stegosaurid dinosaur that lived in Europe around 150 million years ago, during the Late Jurassic Period. Although smaller than its iconic relative Stegosaurus, weighing little more than 2.2 tons and stretching out to only 21 feet from head to tail, Miragaia stands out within its family for its proportionately long neck. Its genus name refers to the Portuguese parish in which its fossils were found.