did stegosaurus have feathers10 marca 2023
As to the number of eggs, incubation time, and parental care, we simply dont know yet. The finding raises the possibility that the very earliest. [94] One hypothesized feeding behavior strategy considers them to be low-level browsers, eating low-growing fruit of various nonflowering plants, as well as foliage. In Hesperosaurus there are two dorsosacrals, and only four fused sacrals, but in Kentrosaurus there may be as many as seven vertebrae in the sacrum, with both dorsosacrals and caudosacrals. Scientists arent exactly sure how they chewed and foraged for food, because their mouth is simply, weird. Unlike the sturdy jaws and grinding teeth common to its fellow ornithischians, Stegosaurus (and all stegosaurians) had small, peg-shaped teeth that have been observed with horizontal wear facets associated with tooth-food contact[92] and their unusual jaws were probably capable of only orthal (up-down) movements. 2. Fossils of the genus have been found in the western United States and in Portugal, where they are found in Kimmeridgian- to Tithonian-aged strata, dating to between 155 and 145million years ago. 3. Spinosaurus - Grace Hansen 2017-09-01 This title will help readers discover Spinosaurus dinosaurs that lived in the Cretaceous period around 95 million years ago. This article was most recently revised and updated by, https://www.britannica.com/animal/Stegosaurus, Stegosaurus - Children's Encyclopedia (Ages 8-11), Stegosaurus - Student Encyclopedia (Ages 11 and up). [83], Debate has been going on about whether the tail spikes were used for display only, as posited by Gilmore in 1914[7] or used as a weapon. [47], The vast majority of stegosaurian dinosaurs thus far recovered belong to the Stegosauridae, which lived in the later part of the Jurassic and early Cretaceous, and which were defined by Paul Sereno as all stegosaurians more closely related to Stegosaurus than to Huayangosaurus. They are somewhat small for dinosaurs, but they are definitely way too big to live in your house! The largest plates were found over the hips and could measure over 60cm (24in) wide and 60cm (24in) tall. (2006). [74] Nevertheless, others have continued to support a defensive function. Also, the pelvic region of the specimens are similar to Kentrosaurus juveniles. It was initially mounted with paired plates set wide, above the base of the ribs, but was remounted in 1924 with two staggered rows of plates along the midline of the back. Though they were large by our standards, the other dinosaurs that roamed while Stegosaurus was alive dwarfed it. Due to their distinctive combination of broad, upright plates and tail tipped with spikes, Stegosaurus is one of the most recognizable kinds of dinosaurs. 'roof-lizard') is a genus of herbivorous, four-legged, armored dinosaur from the Late Jurassic, characterized by the distinctive kite-shaped upright plates along their backs and spikes on their tails. (1986) found "extreme vascularization of the outer layer of bone",[78][76] which was seen as evidence that the plates "acted as thermoregulatory devices". Because they had very small brains, reliance on environmental enrichment would be much less pressing than in hyper-intelligent species like elephants. Evolutionary scientists have recently claimed that pterosaurs had feathers. While this includes all species of birds, there is a hypothesis that many, if not all non-avian dinosaur species also possessed feathers in some shape or form. [25], The most recognizable features of Stegosaurus are its dermal plates, which consisted of between 17 and 22 separate plates and flat spines. [100], One of the most recognizable of all dinosaurs,[40] Stegosaurus has been depicted on film, in cartoons and comics and as children's toys. The discovery of 150-million-year-old fossils in Siberia. This illustration would later go on to form the basis of the stop-motion puppet used in the 1933 film King Kong. This suggests that the different Stegosaurus species were relatively widespread. Overall, these creatures were short, stout, and powerfully built. The first cervical vertebra is the axis bone, which is connected and often fused to the atlas bone. [22] However, this classification scheme was not followed by other researchers, and a 2017 cladistic analysis co-authored by Maidment with Thomas Raven rejects the synonymy of Hesperosaurus with Stegosaurus. Display and species recognition remain likely functions for the plates, although such hypotheses are difficult to investigate. While a human's. See full answer below. Bakker also observed that Stegosaurus could have maneuvered its rear easily, by keeping its large hind limbs stationary and pushing off with its very powerfully muscled but short forelimbs, allowing it to swivel deftly to deal with attack. The flora of the period has been revealed by fossils of green algae, fungi, mosses, horsetails, ferns, cycads, ginkoes, and several families of conifers. Which of the following features did Archaeopteryx not have? 8 -10 feet. Up until a few years ago,. The feet were short and broad. Due to the fragmentary nature of most early Stegosaurus fossil finds, it took many years before reasonably accurate restorations of this dinosaur could be produced. The second Jurassic dinosaur rush. [24] The expedition was successful in finding a nearly complete Stegosaurus near the Kessler site by Bryan Small, whose name would become the namesake of the new site. That's why its name in Greek means "roof lizard.". For example, though it states that scales came from the neck of a tyrannosaur, it does not state whether those scales were from the top, bottom, or sides of the neck. Prefrontal bone Predentary bone Maxilla Perforate Acetabulum, Examine the hip structure in the image of the dinosaur Stegosaurus. [96] However, a 2016 study indicates that Stegosaurus's bite strength was stronger than previously believed. [2] F. F. Hubbell, a collector for Cope, also found a partial Stegosaurus skeleton while digging at Como Bluff in 1877 or 78 that are now part of the Stegosaurus mount (AMNH 5752) at the American Museum of Natural History. [28] Christiansen and Tschopp (2010) proposed that the display function would have been reinforced by the horny sheath which would have increased the visible surface and such horn structures are often brightly colored. A large, slow moving plant-eater, Stegosaurus would have defended itself from predators like Allosaurus and Ceratosaurus with its powerful spiked tail. Stegosaurus had a relatively low brain-to-body mass ratio. 24-26 feet. [2], The next species of Stegosaurus to be named was S. marshi by Frederick Lucas in 1901. One group of tracks is interpreted as showing four or five baby stegosaurs moving in the same direction, while another has a juvenile stegosaur track with an adult track overprinting it. [12] Another mount was made for the NMNH in the form of a mounted composite skeleton consisting of several specimens referred to S. stenops that were collected at Quarry 13 at Como Bluff in 1887, the most complete being USNM 6531. [102], Stegosaurus made its major public debut as a paper mache model commissioned by the U.S. National Museum of Natural History for the 1904 Louisiana Purchase Exposition. 71-69 mya. [8], Arthur Lakes made another discovery later in 1879 at Como Bluff in Albany County, Wyoming, the site also dating to the Upper Jurassic of the Morrison Formation, when he found several large Stegosaurus fossils in August of that year. (2007). By the early 1960s, this had become (and remains) the prevalent idea, mainly because some, This page was last edited on 4 March 2023, at 02:57. Since the dinosaurs, particularly the therapods were more birdlike, they should be covered with feathers. Did stegosaurus have feathers? There were three different species of Stegosaurus, but all were relatively similar looking. Even if they were alive, Stegosaurus would not make a good pet. In their case, it contains what is called the glycogen body, a structure whose function is not definitely known, but which is postulated to facilitate the supply of glycogen to the animal's nervous system. [5][2] Later in 1887, Marsh described two more species of Stegosaurus from Como Bluff, Stegosaurus duplex, based on a partial vertebral column, partial pelvis, and partial left hindlimb (YPM 1858) from Reed's Quarry 11, though the species is now seen as synonymous with Stegosaurus ungulatus. [39] This has been proposed by Bakker[58][69] and opposed by Carpenter. Chure, Daniel J.; Litwin, Ron; Hasiotis, Stephen T.; Evanoff, Emmett; and Carpenter, Kenneth (2006). "Appendix." According to paleontologist and National Geographic grantee Jack Horner, it stands to reason that dinosaurs had similar courting behaviors as today's birds. It is likely that their life consisted pretty much of slowly searching for food, and defending themselves from predators. Dinosaurs from Wuerho. [9][11] This first reconstruction, of S. ungulatus with missing parts filled in from S. stenops, was published by Marsh in 1891. The bony plates along its back were embedded in the skin of the animal, not attached to its skeleton, which is why in most . Many dinosaurs may have been covered in elaborate feathers similar to those of modern-day birds, according to a study of new fossils. [26] It is a young adult of undetermined sex, 5.8m (19ft) long and 2.9m (9.5ft) tall. Annotated catalogue of the dinosaurs (Reptilia, Archosauria) in the collections of Carnegie Museum of Natural History. [12] This historically significant specimen was re-mounted ahead of the opening of the new Peabody Museum building in 1925. A 9 meter long dinosaur called Yutyrannus (meaning feathered tyrant) is the largest known dinosaur fossil discovered to show having feathers. This study showed that 9.8% of Stegosaurus specimens examined had injuries to their tail spikes. . [11] Stegosaurus is one of the better-known dinosaurs, and has been featured in film, postal stamps, and many other types of media. pp. stegosaurus introducing dinosaurs english edition below. [78][81], The vascular system of the plates have been theorized to have played a role in threat displaying as Stegosaurus could have pumped blood into them, causing them to "blush" and give a colorful, red warning. Mounted under the direction of Charles J. Stegosaurus (/ s t s r s /; lit. We know Stegosaurus didn't live in herds, but was probably solitary or lived in small groups. Researchers found many North American specimens in Colorado, Utah, and Wyoming. Stegosaurus, (genus Stegosaurus ), one of the various plated dinosaurs ( Stegosauria) of the Late Jurassic Period (159 million to 144 million years ago) recognizable by its spiked tail and series of large triangular bony plates along the back. We know very little about the reproduction of these dinosaurs. The Stegosaurus was a large plant-eating dinosaur. Scant evidence in the fossil record has never been definitive - until now, scientists say. [2][56] In 2015, Maidment et al. [10][7] The skeleton was expertly unearthed by Felch, who first divided the skeleton into labeled blocks and prepared them separately. Spinosaurus probably walked on two legs, but scientists think that it may have been able to walk on all four legs too. While every effort has been made to follow citation style rules, there may be some discrepancies. Animal fossils discovered include bivalves, snails, ray-finned fishes, frogs, salamanders, turtles like Glyptops, sphenodonts, lizards, terrestrial and aquatic crocodylomorphs like Hoplosuchus, several species of pterosaurs such as Harpactognathus and Mesadactylus, numerous dinosaur species, and early mammals such as docodonts (like Docodon), multituberculates, symmetrodonts, and triconodonts. These are, of course, digital or animatronic dinosaurs.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[336,280],'animals_net-banner-1','ezslot_9',116,'0','0'])};__ez_fad_position('div-gpt-ad-animals_net-banner-1-0'); Humans never domesticated Stegosaurus in any way, and never interacted with these extinct creatures. Stegosaurus, therefore, probably browsed primarily among smaller twigs and foliage, and would have been unable to handle larger plant parts unless the animal was capable of biting much more efficiently than predicted in this study. [23] Both the AMNH and CM material has been referred to Stegosaurus ungulatus. [80] Christiansen and Tschopp (2010) state that the presence of a smooth, insulating keratin covering would have hampered thermoregulation, but such a function cannot be entirely ruled out as extant cattle and ducks use horns and beaks to dump excess heat despite the keratin covering. Marsh suggested that they functioned as some form of armor,[68] though Davitashvili (1961) disputed this, claiming that they were too fragile and ill-placed for defensive purposes, leaving the animal's sides unprotected. In a December study, scientists described two feathers from the mid-Cretaceous period (about 100 million years ago) found in the Kachin Province of Myanmar. [90], A 2022 study by Wiemann and colleagues of various dinosaur genera including Stegosaurus suggests that it had an ectothermic (cold blooded) or gigantothermic metabolism, on par with that of modern reptiles. Fossils of the genus have been found in the western United States and in Portugal, where they are found in Kimmeridgian- to Tithonian-aged . Both groups evolved from a lineage of smaller armoured dinosaurs such as Scutellosaurus and Scelidosaurus of the Early Jurassic Period (206 million to 180 million years ago). Why were cheeks so important? [81] The use of exaggerated structures in dinosaurs as species identification has been questioned, as no such function exists in modern species. The largest species could grow nearly 30 ft. long and weigh up to 7 metric tons. Triceratops quite likely did have some sort of feathers, as many of its ancestors have been found to have them. Lucas also re-examined the issue of the life appearance of Stegosaurus, coming to the conclusion that the plates were arranged in pairs in two rows along the back, arranged above the bases of the ribs. | SciShow News Watch on Lucas reclassified this species in the new genus Hoplitosaurus later that year. He contends that they had insufficient width for them to stand erect easily in such a manner as to be useful in display without continuous muscular effort. So there's about just as much time between us and T. rex as there is between T. rex and Stegosaurus, so they never would have met each other. Paleontology and Geology of the Upper Jurassic Morrison Formation. Did T Rexes Have Feather? [45], Like the spikes and shields of ankylosaurs, the bony plates and spines of stegosaurians evolved from the low-keeled osteoderms characteristic of basal thyreophorans. These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period. The plates had blood vessels running through grooves and air flowing around the plates would have cooled the blood. [88] One 2009 study of Stegosaurus specimens of various sizes found that the plates and spikes had delayed histological growth in comparison to the skeleton and when the dinosaur reached maturity, growth in the osteoderms may have increased. It had a small antorbital fenestra, the hole between the nose and eye common to most archosaurs, including modern birds, though lost in extant crocodylians. 2.5 - 3 meters. However, their reproductive organs still could not touch as there is no evidence of muscle attachments for a mobile penis nor a baculum in male dinosaurs. [39] Their teeth were "not tightly pressed together in a block for efficient grinding",[93] and no evidence in the fossil record of stegosaurians indicates use of gastrolithsthe stone(s) some dinosaurs (and some present-day bird species) ingestedto aid the grinding process, so how exactly Stegosaurus obtained and processed the amount of plant material required to sustain its size remains "poorly understood". [75] Christiansen and Tschopp (2010), having studied a well-preserved specimen of Hesperosaurus with skin impressions, concluded that the plates were covered in a keratin sheath which would have strengthened the plate as a whole and provided it with sharp cutting edges. [5], At one time, stegosaurs were described as having a "second brain" in their hips. [9][7] Marshall P. Felch collected the skeleton throughout 1885 and 1886 from Morrison Formation strata at his quarry in Garden Park, a town near Caon City, Colorado. [2] Because of this, the International Code of Zoological Nomenclature decided to replace the type species with the more well known species Stegosaurus stenops. Ears are made of cartilage and skin, and these are soft tissues which typically do not preserve well in the fossil record. Well preserved integumentary impressions of the plates of Hesperosaurus show a smooth surface with long and parallel, shallow grooves. The spikes were probably used as defense mechanisms, while it is . . 2. [30], The quadrupedal Stegosaurus is one of the most easily identifiable dinosaur genera, due to the distinctive double row of kite-shaped plates rising vertically along the rounded back and the two pairs of long spikes extending horizontally near the end of the tail. Stegosaurus could have easily bitten through smaller green branches, but would have had difficulty with anything over 12mm in diameter. Corrections? Spinosaurus was a giant meat-eating dinosaur that grew to lengths of 18 m (60 ft.). Although they're sometimes called "flying dinosaurs," they are technically distinct from dinosaurs. [12] The aging mount was dismantled in 2003 and replaced with a cast in an updated pose in 2004. Based on the results of the study, it was revealed that the subadult Stegosaurus specimen had a bite similar in strength to that of modern herbivorous mammals, in particular, cattle and sheep. Let us know if you have suggestions to improve this article (requires login). The bony plates on Stegosaurus's back were set . Calculating the speed of Quadrupedal graviportal animals by Ruben Molina-Perez, Asier Larramendi. Learn how Stegosaurus survived below. These dinosaurs had large flattened plates along the ridges of their backs. Debate is raging about whether pterosaurs, flying reptiles that lived alongside the dinosaurs, had feathers or not. . The discovery of these branched integumentary structures outside theropods suggests that featherlike structures coexisted with scales and were potentially widespread among the entire dinosaur clade; feathers may thus have been present in the earliest dinosaurs. Please refer to the appropriate style manual or other sources if you have any questions. Although it was undoubtedly lacking in other respects, Stegosaurus did possess one relatively advanced anatomical feature: Extrapolating from the shape and arrangement of its teeth, experts believe this plant eater may have possessed primitive cheeks. 3. . That's when Stegosaurus was a species of dinosaur that walked around the Earth. The dinosaurs with hips that . Researchers have determined that some dinosaurs had large forebrains, which would lead to heightened senses of both hearing and smell. He led the construction of the first ever Stegosaurus skeletal mount at the Peabody Museum of Natural History, which was depicted with paired plates. [36] Such an extensive beak was probably unique to Stegosaurus and some other advanced stegosaurids among ornithischians, which usually had beaks restricted to the jaw tips. [24][25] The "Small Quarry" Stegosaurus' articulation and completeness clarified the position of plates and spikes on the back of Stegosaurus and the position and size of the throat ossicles found earlier first by Felch with the Stegosaurus stenops holotype, though like the S. stenops type, the fossils were flattened in a "roadkill" condition. World Book's four-volume 'Dinosaurs!' series explains the origins and features of more than 100 types of dinosaurs. Stegosaurus ungulatus by the describers. This indicates that the plates were covered in keratinous sheaths. Many dinosaurs may have been covered in elaborate feathers similar to those of modern-day birds, according to a study of new fossils. Discoveries of articulated stegosaur armor show, at least in some species, these spikes protruded horizontally from the tail, not vertically as is often depicted. It has a pubis and ischium that both point towards the posterior of the animal. 38. 233248. [89] A 2013 study concluded, based on the rapid deposition of highly vascularised fibrolamellar bone, that Kentrosaurus had a quicker growth rate than Stegosaurus, contradicting the general rule that larger dinosaurs grew faster than smaller ones. This mount was created under the direction of Charles Gilmore at the U.S. National Museum of Natural History. [54], Susannah Maidment and colleagues in 2008 proposed extensive alterations to the taxonomy of Stegosaurus. [86] It also may function as a balance organ, or reservoir of compounds to support the nervous system. These variations cast doubt on the hypothesis of a strong thermoregulatory function for the plates of Stegosaurus, because such structures were not optimized in all stegosaurs for collecting or releasing heat. One of the major subjects of books and articles about Stegosaurus is the plate arrangement. [13], In a 2010 review of Stegosaurus species, Peter Galton suggested that the arrangement of the plates on the back may have varied between species, and that the pattern of plates as viewed in profile may have been important for species recognition. Twice! Foster, J. McIntosh, J. S. (1981). University of Chicago Press. Two pairs of pointed bony spikes were present on the end of the tail. "All systems, online!" Billy shouted. Study with Quizlet and memorize flashcards containing terms like What is the bone at the front of the lower jaw in an Ornithischian Dinosaur called? Archaeologists found the most specimens in the Morrison Formation, which we have decent information about the ecosystem of during that time. As the recently-described Yutyrannus shows, even 30-foot-long tyrannosaurs were fluffy. [13] Additional specimens recovered from the same quarry by the United States National Museum of Natural History, including tail vertebrae and an additional large plate (USNM 7414), belong to the same individual as YPM 1853. Stegosaurus may have preferred drier settings than these other dinosaurs. Xing, L., Lockley, M. G., PERSONS IV, W. S., Klein, H., Romilio, A., Wang, D., & Wang, M. (2021). They are powerful animals, and would need strongly reinforced fencing for their enclosures. Stegosaurus is a genus of armored dinosaur, with large bone plates along its neck, back and tail. [4] Marsh also incorrectly referred several fossils to S. armatus, including the dentary and teeth of the sauropod Diplodocus and putting sauropod limb bones and an Allosaurus tibia under YPM 1850. The phalangeal formula is 2-2-2-2-1, meaning the innermost finger of the fore limb has two bones, the next has two, etc. [46] Galton (2019) interpreted plates of an armored dinosaur from the Lower Jurassic (Sinemurian-Pliensbachian) Lower Kota Formation of India as fossils of a member of Ankylosauria; the author argued that this finding indicates a probable early Early Jurassic origin for both Ankylosauria and its sister group Stegosauria. [43] All four limbs were supported by pads behind the toes. [39] Palaeontologists believe it would have eaten plants such as mosses, ferns, horsetails, cycads, and conifers or fruits. Paleontologists think feathers may have first evolved to keep dinosaurs warm. It had a very distinct and unusual posture. Much of their notoriety comes from their odd, and intriguing, appearance. They do estimate that they fed on a number of different plant types, including ferns, moss, fruits, cycads, conifers, and horsetails. "Stegosaurus!" "Tyrannosaurus!" The six of us Morphed, and appeared where Hatchasaurus is. Stegosaurus shared the land with a lot of other famous dinosaurs. We jumped onto our Dinozords. B. Though it is not always perfectly preserved, the acromion ridge is slightly larger than in Kentrosaurus. Did stegosaurus have feathers? [85], S. stenops had four dermal spikes, each about 6090cm (2.03.0ft) long. S. stenops preserves 46 caudal vertebrae, and up to 49, and along the series both the centrums and the neural spines become smaller, until the neural spines disappear at caudal 35. Of the species that have been classified in the upper Morrison Formation of the western US, only three are universally recognized: S. stenops, S. ungulatus and S. sulcatus. [24] Phillip Reinheimer, a steel worker, mounted the Stegosaurus skeleton at the DMNS in 1938. "Body mass estimates of an exceptionally complete Stegosaurus (Ornithischia: Thyreophora): Comparing volumetric and linear bivariate mass estimation methods", "The phylogenetic nomenclature of ornithischian dinosaurs", "A new long-necked 'sauropod-mimic' stegosaur and the evolution of the plated dinosaurs", "A new phylogeny of Stegosauria (Dinosauria, Ornithischia)", "Evidence for a Sauropod-Like Metacarpal Configuration in Stegosaurian Dinosaurs", "Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America", "A new specimen of the ornithischian dinosaur Hesperosaurus mjosi from the Upper Jurassic Morrison Formation of Montana, U.S.A., and implications for growth and size in Morrison stegosaurs", "Principal characters of American Jurassic dinosaurs, part III", "CAD assessment of the posture and range of motion of, "The socio-sexual behaviour of extant archosaurs: Implications for understanding dinosaur behaviour", "Internal vascularity of the dermal plates of Stegosaurus (Ornithischia, Thyreophora)", 10.1666/0094-8373(2005)031[0291:teafot]2.0.co;2, "The 'species recognition hypothesis' does not explain the presence and evolution of exaggerated structures in non-avialan dinosaurs", "Lies, damned lies, and Clash of the Dinosaurs", "Decoupled form and function in disparate herbivorous dinosaur clades", https://en.wikipedia.org/w/index.php?title=Stegosaurus&oldid=1142738597, By 1891, Marsh published a more familiar view of, The plates were paired in a double row along the back, such as in Knight's 1901 reconstruction and the 1933 film, Two rows of alternating plates. "Log on!" Jason shouted. In 1910, Richard Swann Lull wrote that the alternating pattern seen in S. stenops was probably due to shifting of the skeleton after death. [27] The skeleton was nicknamed the "Bollan Stegosaurus" and is in the collections of the Dinosaur Journey Museum. About 67 million years ago, two iconic dinosaurs, a Triceratops horridus and a Tyrannosaurus rex, died and were quickly buried together side by side in a single grave. [76], Another possible function of the plates is they may have helped to control the body temperature of the animal,[76] in a similar way to the sails of the pelycosaurs Dimetrodon and Edaphosaurus (and modern elephant and rabbit ears). . We can use rock formations to determine habitat, and damaged fossils to speculate interactions between animals, but beyond that all behavior is speculative. And feathers were not only present an small, especially bird-like dinosaurs. So there is now more evidence that perhaps, yes, Tyrannosaurus Rex did have feathers! Farther posteriorly, the proportionately larger the cervicals become, although they do not change greatly in anything other than size. Comparisons were made between it (represented by a specimen known as "Sophie" from the United Kingdom's Natural History Museum) and two other herbivorous dinosaurs; Erlikosaurus and Plateosaurus to determine if all three had similar bite forces and similar niches. [26], Soon after its discovery, Marsh considered Stegosaurus to have been bipedal, due to its short forelimbs. 3-4.500 lbs. Stegosaurus remains were first identified during the "Bone Wars" by Othniel Charles Marsh at Dinosaur Ridge National Landmark. Scales that grew larger and began to diverge. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[336,280],'animals_net-large-leaderboard-2','ezslot_13',117,'0','0'])};__ez_fad_position('div-gpt-ad-animals_net-large-leaderboard-2-0');Unfortunately, fossils do not provide much insight into the behavior of an animal. On the sides of the jaws it had tiny, palm-shaped cheek teeth for chewing soft vegetation. It is on display in the University of Wyoming Geological Museum. The concept of genetic engineering, which is at the heart of Jurassic Park 's dinosaur creation, is a real scientific principle that has been used in a variety of fields. The function of this array of plates and spikes has been the subject of much speculation among scientists. Did the Stegosaurus have teeth? Carnotaurus. However, it has also been suggested that the plates could have helped the animal increase heat absorption from the sun. Until 1918, the only mounted skeleton of Stegosaurus in the world was O. C. Marsh's type specimen of S. ungulatus at the Peabody Museum of Natural History, which was put on display in 1910.
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