![]() Their teeth are small, triangular and flat, Wear facets suggest food grinding took place.ĭespite their size, their braincase was very small. Others interpret these ridges as a modified from other ornithischians, who may have supported fleshy cheeks rather than beaks. ![]() The beak was likely unique to Stegosaurus and some advanced Stegosauridae. The mandible has flat upward extensions that hid the teeth from the side, which probably helped support a turtle-like beak, The presence of the latter probably insinuate the existence of cheeks. The position of the skull suggests it may have browsed low vegetation, suggested by the lack of front teeth and their probable replacement by a rhamphotheca. Stegosaurus has a long and narrow skull that was proportionally small. One subadult is 4.6 meters (15.1 feet) long and 2 meters (6.6 feet) tall. Most Stegosaurus are mature, but recent juveniles have been found. It likely needed armour, since it lived with large theropods. They could grow up to 9 meters (29.5 feet) long, but were dwarfed by contemporaneous sauropods. Stegosaurus was a quadrupedal dinosaur with a distinct double row of kite-shaped plates arranged vertically and 4 long spikes on the end of its tail, being one of the easiest dinosaurs to identify. In December 2014, it was put on display at the Natural History Museum. They are 85% intact and discovered in Wyoming, with 360 bones. Sophie is a young adult of indeterminate sex, who reached 5.6 meters (18 feet) long and 2.9 meters (9.5 feet) tall. Sophie the Stegosaurus is the most complete known specimen. Gilmore and Lucas' interpretations are, generally, accepted now, with Lul's mount changed in 1924. stenops (now including the fully-prepared holotype) preserved alternating plates near the back's peak, having no evidence of shifting after death. Charles Gilmore (1914) debated this, noting several S. ![]() Richard Swann Lull (1910) the staggered pattern was due to shifting of the skeleton after death, mounting the first skeletal mount at the Peabody Museum of Natural History, which had paired plates. Later the following year, Lucars re-reexamined the plates, finding they likely sat in staggered rows. marshi was named by Frederick Lucas (1901), which he later merged with Hoplitosaurus, re-examining the plate formation, which he found to form double rows above each rib base. However, Richard Lydekker (1893) accidentally published the skeletal under Hypsirhopus. ungulatus paleoillustration filled missing elements with S. stenops allowed him to fully reconstruct the entire animal. Though not fully prepared at the time, the near-articulate S. Marsh continued to collect and study new specimens, naming S. "Sophie" the Stegosaurus, which debuted at the Natural History Museum of London in 2014 in an exhibit that featured original research. "affinis" was named by Marsh (1881) from a pelvis, but it is thought to have an insufficient description, so it is a nomen nudum. ungulatus, named by Marsh (1879) gave a detailed description of Stegosaurus collected the following year. Many later assigned these to Stegosaurus, though vertebral differences highlighted by Peter Galton (2010) suggests it may be distinct. Edward Drinker Cope (1878) named Hypsirhopus discurus, a fragmentary stegosaur from Cope's Nipple site, Cope's Quarry 3, Garden Park, Colorado. Much more material was found in the next years, from which Marsh continued to study until 1897. armatus, believing them to be of an aquatic turtle-like animal, naming it the "roofed lizard" due to his interpretation that they lay flat over the back, somewhat like shingles. Stegosaurus was named by Othniel Charles Marsh (1877) during the bone wars. Stegosaurus mount at the Royal Ontario Museum with outdated posture.
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