Species: Stegosaurus stenops
Length: 30ft
Height: 14ft
Location: North America
Time Period: Jurassic
Movies: The Lost World: Jurassic Park, Jurassic Park ///, Jurassic World
Games: The Lost World: Jurassic Park, Jurassic Park: Trespasser, Jurassic Park: Operation Genesis
Bio: A medium sized Jurassic Herbivore, Stegosaurus is characterized by the large, bony, pentagonal plates running down the spine  which end in four large, bony spikes at the end of the tail. Because of the small brain case to body size ratio, Stegosaurus is thought to be extremely stupid, however studies have found evidence for an unusually large number of nerves near the base of the tail, which currently are of unknown function. InGen's Stegosaurus is actually twice the size of any known S. stenops specimen. Stegosaurs seem to show a fierce determination for the defense of their infants.
Role in Jurassic Park: Although a nitrogen-frozen vial of a Stegosaur embryo is stolen by Dennis Nedry in the first Jurassic Park movie, a live animal is is not seen until a herd of live specimens are encountered in the sequel, The Lost World; Jurassic Park by paleontologist Sarah Harding, who had arrived at Isla Sorna ahead of the rest of John Hammond's documentarian team. Sarah took her time on the island to study the Stegosaur nest, where she discovered that the infant's stay within the nesting area for a longer period of time than previously thought by paleontological science as the time. After the rest of Hammond's team arrives on Sorna, they encounter Sarah in the midst of study. Sarah, overly eager, gets too close to an infant Stegosaur which causes the alarm of the rest of the herd. Closing in around Sarah and cutting her off from the rest of her team, the Stegosaurus attempt to impale Sarah with their spiked tails before eventually leaving after deciding that Sarah was not enough of a threat for them to continue their efforts. We later find that Stegosaurus is on the list of the InGen harvesters, as one is released from it's cage by Nick Van Owen and Sarah Harding. We do not see Stegosaurus again until the end of the film where they are traveling in herds. Stegosaurs once again return in Jurassic Park ///, seen traveling in herds along with other herbivores such as Triceratops and Brachiosaurus. In Jurassic World, Stegosaurus appears in the Gyrosphere Valley, along side other herbivores.