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. (In 1893, Richard Lydekker mistakenly re-published Marsh's drawing under the label Hypsirhophus. [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. [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. Here's a Stegosaurus skin: No feathers, but armour only. C. 3. It is likely that their life consisted pretty much of slowly searching for food, and defending themselves from predators. Researchers have determined that some dinosaurs had large forebrains, which would lead to heightened senses of both hearing and smell. Other ornithischians included Camptosaurus, Gargoyleosaurus, Dryosaurus, Othnielosaurus and Drinker. Stegosaurus could have easily bitten through smaller green branches, but would have had difficulty with anything over 12mm in diameter. Omissions? [12] This historically significant specimen was re-mounted ahead of the opening of the new Peabody Museum building in 1925. Consequently, we have determined that they have interpreted the evidence of the so-called feathered dinosaurs through an evolutionary perspective. 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. [2] Many of the plates are manifestly chiral[19][20] and no two plates of the same size and shape have been found for an individual; however plates have been correlated between individuals. This "brain" was proposed to have given a Stegosaurus a temporary boost when it was under threat from predators. [5] The majority of the fossils came from Quarry 13, including the type specimen of Stegosaurus ungulatus (YPM 1853), which was collected by Lakes and William Harlow Reed the same year and named by Marsh. [103], Early skeletal mounts and plate interpretation. [85], S. stenops had four dermal spikes, each about 6090cm (2.03.0ft) long. Which dinosaurs did not have feathers? Up until a few years ago,. [5] The type specimen also preserved the pes, which was the namesake of the species, meaning "hoofed roofed lizard". They write new content and verify and edit content received from contributors. Description of the Stegosaurus. Ankylosaurus And Feathers The dinosaurs' closest relatives that had the ability to fly, like the Ptesaurus, were reptiles and were not real dinosaurs. Prefrontal bone Predentary bone Maxilla Perforate Acetabulum, Examine the hip structure in the image of the dinosaur Stegosaurus. Learn how Stegosaurus survived below. There were flat floodplains, savannas dominated by ferns and the occasional tree, and forests. Last Update: May 30, 2022. . Second Edition. [2] These first, fragmented bones (YPM 1850) became the holotype of Stegosaurus armatus when Yale paleontologist Othniel Charles Marsh described them in 1877. (eds.). [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. [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. Flexible, armorlike scales protected the throat of Stegosaurus.. Bony plates. The competition was foremost started by the American Museum of Natural History, the Carnegie Museum of Natural History, and the Field Museum of Natural History which all sent expeditions to the west to make their own dinosaur collections and mount skeletons in their fossil halls. Did stegosaurus have feathers? Like most plant-eating dinosaurs, it had no teeth in the front of its mouth, but only a beak. [45] The plates' large size suggests that they may have served to increase the apparent height of the animal, either to intimidate enemies[7] or to impress other members of the same species in some form of sexual display. Also, the pelvic region of the specimens are similar to Kentrosaurus juveniles. The blade is relatively straight, although it curves towards the back. 8 -10 feet. '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. '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. Introduction to the Study of Dinosaurs. In terms of its, sometimes unique, physical characteristics, Carnotaurus was known for its unique features, including its flat snout, horns above its eyes, teeny tiny arms and long, muscular legs. If its filaments are related to the proto-feathers of the theropods (which is possible but not. . [71][40] Tracks discovered by Matthew Mossbrucker (Morrison Natural History Museum, Colorado) suggest that Stegosaurus lived and traveled in multiple-age herds. [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. It had a short neck and a small head, meaning it most likely ate low-lying bushes and shrubs. [87], Juveniles of Stegosaurus have been preserved, probably showing the growth of the genus. In 1910, Richard Swann Lull wrote that the alternating pattern seen in S. stenops was probably due to shifting of the skeleton after death. All photos used are royalty-free, and credits are included in the Alt tag of each image. Many dinosaurs may have been covered in elaborate feathers similar to those of modern-day birds, according to a study of new fossils. The two juveniles are both relatively small, with the smaller individual being 1.5m (4.9ft) long, and the larger having a length of 2.6m (8.5ft). Dinosaurs are land-dwelling animals. While a human's. See full answer below. 2.5 - 3 meters. An average Stegosaurus was around 20 feet (6.1 meters) long, and weighed 2 tons. Preserved on slabs of ancient limestone in north-eastern Brazil, a newly discovered fossil of Tupandactylus imperator reveals the existence of pterosaur feathers about 113 million years ago. So from being sluggish "terrible lizards" with scales, cold blood and pea-brains that went extinct, dinosaurs are now understood to . Stegosaurus and its relatives are closely related to the ankylosaurs, with which they share not only dermal armour but several other features, including a simple curved row of small teeth. Although Stegosaurus is undoubtedly now considered to have been quadrupedal, some discussion has occurred over whether it could have reared up on its hind legs, using its tail to form a tripod with its hind limbs, to browse for higher foliage. The sacro-lumbar expansion is not unique to stegosaurs, nor even ornithischians. They are arranged in two rows of alternating pairs, and at the tip of the tail, they transition into a line of foreboding spikes, each more than 30cm long. The only interactions between Stegosaurus and humans are in movies and television. [43] All four limbs were supported by pads behind the toes. No feathers c. Feather shafts were too thin d. Feather shafts were too heavy e. No wings. Debate is raging about whether pterosaurs, flying reptiles that lived alongside the dinosaurs, had feathers or not. [96] However, a 2016 study indicates that Stegosaurus's bite strength was stronger than previously believed. Farther posteriorly, the proportionately larger the cervicals become, although they do not change greatly in anything other than size. Stegosaurus skeleton. Evolutionary scientists have recently claimed that pterosaurs had feathers. Based on this data, it is likely Stegosaurus also ate woodier, tougher plants such as cycads, perhaps even acting as a means of spreading cycad seeds. [45] Bakker stated that Stegosaurus could flip its osteoderms from one side to another to present a predator with an array of spikes and blades that would impede it from closing sufficiently to attack the Stegosaurus effectively. "Appendix." However, the following year, Lucas wrote that he now believed the plates were probably attached in staggered rows. Updates? "Stegosaurus!" "Tyrannosaurus!" The six of us Morphed, and appeared where Hatchasaurus is. Now!" Jason shouted, and our Dinozords appeared. The Stegosaurus had a large gut that was responsible for its digestion and breakdown of nutrients aided by gastroliths. [11] [3] Though several more complete specimens have been attributed to Stegosaurus armatus, preparation of the bones and analysis has discovered that this type specimen is actually dubious, which is not an ideal situation for the type species of a well-known genus like Stegosaurus. 7-8 meters. Stegosaurus was extinct for 66 million years before Tyrannosaurus walked on Earth. 5. The answer, surprisingly, is almost certainly 'never - they have always had them.' It's now been discovered that pterosaurs have true feathers. Robert Bakker noted the tail was likely to have been much more flexible than that of other dinosaurs, as it lacked ossified tendons, thus lending credence to the idea of the tail as a weapon. However, it has also been suggested that the plates could have helped the animal increase heat absorption from the sun. [25], The most recognizable features of Stegosaurus are its dermal plates, which consisted of between 17 and 22 separate plates and flat spines. Discoveries of articulated stegosaur armor show, at least in some species, these spikes protruded horizontally from the tail, not vertically as is often depicted. [98], Dinosaurs that lived alongside Stegosaurus included theropods Allosaurus, Saurophaganax, Torvosaurus, Ceratosaurus, Marshosaurus, Stokesosaurus, Ornitholestes, Coelurus and Tanycolagreus. [26] The Sauriermuseum found several partial Stegosaurid skeletons throughout their excavations at Howe Quarry, Wyoming in the 1990s, though only Sophie has been described in detail. Why were cheeks so important? [26][30] The skeleton was excavated on private land, so it was interned by US federal authorities who then gave Sophie to the Natural History Museum, London where it was put on display in December of 2014 and later described in 2015. A feathered dinosaur is any species of dinosaur possessing feathers. Stegosaurus had much longer hind legs than forelegs, and very strong muscles around its hips. [44] The fore limbs were much shorter than the stocky hind limbs, which resulted in an unusual posture. 233248. It had a very distinct and unusual posture. Jurassic West: The Dinosaurs of the Morrison Formation and Their World. [101] Artist Charles R. Knight published his first illustration of Stegosaurus ungulatus based on Marsh's skeletal reconstruction in a November 1897 issue of The Century Magazine. revised their suggestion due to the recognition by Galton of S. armatus as a nomen dubium and its replacement by S. stenops as type species. 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. As the recently-described Yutyrannus shows, even 30-foot-long tyrannosaurs were fluffy. [101], Marsh published his more accurate skeletal reconstruction of Stegosaurus in 1891, and within a decade Stegosaurus had become among the most-illustrated types of dinosaur. "The fauna and flora of the Morrison Formation: 2006". . We know that this dinosaur was herbivorous based upon its teeth. [70], Stegosaurus had short fore limbs in relation to its hind limbs. The fossils included only a couple postcranial remains, though in the 1900s-1920s Carnegie crews at Dinosaur National Monument discovered dozens of Stegosaurus specimens in one of the greatest single sites for the taxon. [86] It also may function as a balance organ, or reservoir of compounds to support the nervous system. We can use rock formations to determine habitat, and damaged fossils to speculate interactions between animals, but beyond that all behavior is speculative. He delves into the latest discoveries in China, the US, A line of flattened, plate-like spines ran down their backs. Past the first few dorsals, the centrum of the bones become more elongate front-to-back, and the transverse processes become more elevated dorsal. [97], The Morrison Formation is interpreted as a semiarid environment with distinct wet and dry seasons, and flat floodplains. The first known skeletons were fragmentary and the bones were scattered, and it would be many years before the true appearance of these animals, including their posture and plate arrangement, became well understood. They walked on four short legs, had small heads, and long tails capped with defensive spines.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[468,60],'animals_net-medrectangle-4','ezslot_3',121,'0','0'])};__ez_fad_position('div-gpt-ad-animals_net-medrectangle-4-0'); A line of flattened, plate-like spines ran down their backs. It is more likely, however, that much of the sacral cavity was used for storing glycogen, as is the case in many present-day animals. Did all dinosaurs have feather? Dinosaurs did have feathers ancestrally but most groups lost them. If not feathered, some dinosaurs are believed to have feather-like structures such as . Brinkman, P. D. (2010). Stegosaurus is one of the most recognisable dinosaurs, for one main reason: the big, triangle-shaped plates lining its neck, back and tail. Stegosaurs lost the armour from the flanks of the body that these early relatives had. [7][2] Stegosaurus sulcatus most notably preserves a large spike that has been speculated to have been a shoulder spike that is used to diagnose the species. Its position in the dinosaur family tree raises big questions about the origins of feathers. In his article about the new mount for the museum's journal, Barnum Brown described (and disputed) the popular misconception that the Stegosaurus had a "second brain" in its hips. New Mexico Museum of Natural History and Science Bulletin, 36. Become a member and. The dinosaurs with hips structured similarly to lizards include the great sauropods (e.g., apatosaurs, brachiosaurs, and diplodocoids), and the carnivorous theropods (e.g., tyrannosaurs, and dromaeosaurs). 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. [32][33], Most of the information known about Stegosaurus comes from the remains of mature animals; more recently, though, juvenile remains of Stegosaurus have been found. Spinosaurus probably walked on two legs, but scientists think that it may have been able to walk on all four legs too. [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. They were large, heavily built, herbivorous quadrupeds with rounded backs, short fore limbs, long hind limbs, and tails held high in the air. [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. The plates had blood vessels running through grooves and air flowing around the plates would have cooled the blood. Two years ago a study claimed to have found fossil evidence of "protofeathers . Since the dinosaurs, particularly the therapods were more birdlike, they should be covered with feathers. Sereno, P.C., 1998, "A rationale for phylogenetic definitions, with application to the higher-level taxonomy of Dinosauria". The tail appears to have been held well clear of the ground, while the head of Stegosaurus was positioned relatively low down, probably no higher than 1m (3.3ft) above the ground. The specimens can be identified as not mature because they lack the fusion of the scapula and coracoid, and the lower hind limbs. [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. Though adult T. rexes were mostly covered in scales, scientists think . Stegosaurus was up to 30 feet (9.1 meters) long. [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. Although they're sometimes called "flying dinosaurs," they are technically distinct from dinosaurs. We jumped onto our Dinozords. all of these. One of the major subjects of books and articles about Stegosaurus is the plate arrangement. This is why you remain in the best website to look the incredible ebook to have. 10 besttroodon 5 yr. ago rex had feathers as well, Norell said. 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. A large, slow moving plant-eater, Stegosaurus would have defended itself from predators like Allosaurus and Ceratosaurus with its powerful spiked tail. Score: 4.3/5 (1 votes) . 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. This study showed that 9.8% of Stegosaurus specimens examined had injuries to their tail spikes. [26][25][24] The Stegosaurus skeletons have been mounted alongside an Allosaurus skeleton collected in Moffat County, Colorado originally in 1979. Articulated with the scapula, the coracoid is sub-circular. McIntosh, J. S. (1981). 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. 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. The forelimbs were much shorter than the hind limbs, which gave the back a characteristically arched appearance. Paleontologists initially suggested that this space could be for a second brain. Stegosaurus ungulatus by the describers. Its skull looked like a parrot, especially the beak, but with no feathers. It had passive defensive strategies like swinging its Stegosaurus tail for protection. Stegosaurus is famous for its two rows of kite-shaped plates that stick out from its neck, back, and tail. The second Jurassic dinosaur rush. This art shows a relative of Triceratops (Pachyrhinosaurus) with a thick fur-like feathery covering, which some people have suggested is feasible given its northerly range.. Its great to see that people are warming up to the idea of feathered dinosaurs though, because I have a . This interpretation is supported by the absence of front teeth and their likely replacement by a horny beak or rhamphotheca. A 9 meter long dinosaur called Yutyrannus (meaning feathered tyrant) is the largest known dinosaur fossil discovered to show having feathers. [82] However, Christiansen and Tschopp (2010) consider this unlikely, as stegosaur plates were covered in horn rather than skin. This illustration would later go on to form the basis of the stop-motion puppet used in the 1933 film King Kong. Did stegosaurus have feathers? It is on display in the University of Wyoming Geological Museum. [26], Soon after its discovery, Marsh considered Stegosaurus to have been bipedal, due to its short forelimbs. The first cervical vertebra is the axis bone, which is connected and often fused to the atlas bone. world. "All systems, online!" Billy shouted. However, the type specimen of S. ungulatus preserves two flattened spine-like plates from the tail that are nearly identical in shape and size, but are mirror images of each other, suggesting that at least these were arranged in pairs. [15] Another composite mount, using specimens referred to S. ungulatus collected from Dinosaur National Monument between 1920 and 1922, was put on display at the Carnegie Museum of Natural History in 1940.[16]. [39] Palaeontologists believe it would have eaten plants such as mosses, ferns, horsetails, cycads, and conifers or fruits. Thus, their conception of Stegosaurus would include three valid species (S.armatus, S.homheni, and S.mjosi) and would range from the Late Jurassic of North America and Europe to the Early Cretaceous of Asia. Read on to learn about the stegosaurus. [13] These were highly modified osteoderms (bony-cored scales), similar to those seen in crocodiles and many lizards today. Did T. rex have fur or feathers? The resultant bite forces calculated for Stegosaurus were 140.1 newtons (N), 183.7N, and 275N (for anterior, middle and posterior teeth, respectively), which means its bite force was less than half that of a Labrador retriever. besttroodon 5 yr. ago No they do not have feathers. [25] Initially, Marsh described S.ungulatus as having eight spikes in its tail, unlike S.stenops. 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. Over the last two decades, thousands of fossils unearthed in China's Liaoning Province have confirmed what paleontologists long suspected: Dinosaurs rocked feathers long before birds took to the sky. Stegosaurus had a relatively low brain-to-body mass ratio. Sophie was first discovered by Bob Simon in 2003 at the Red Canyon Quarry near Shell, Wyoming and was excavated by crews from the Swiss Sauriermuseum in 2004. Bite force was also calculated using these models and the known skull proportions of the animal, as well as simulated tree branches of different size and hardness. This hypothesis proposes that the plates acted as radiators, releasing body heat to a cooler ambient environment; conversely, the plates could also have collected heat by being faced toward the sun like living solar panels. Some theories suggest that the large plates on their back could change color as a mating display or to attract a female. 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. They advocated synonymizing S.stenops and S.ungulatus with S.armatus, and sinking Hesperosaurus and Wuerhosaurus into Stegosaurus, with their type species becoming Stegosaurus mjosi and Stegosaurus homheni, respectively. This was uncovered using the spectroscopy of lipoxidation signals, which are byproducts of oxidative phosphorylation and correlate with metabolic rates. [29][26], Sophie the Stegosaurus is the best preserved Stegosaurus specimen, being 85% intact and containing 360 bones. They walked on four short legs, had small heads, and long tails capped with defensive spines. The fact that an animal weighing over 4.5metric tons (5short tons) could have a brain of no more than 80g (2.8oz) contributed to the popular old idea that all dinosaurs were unintelligent, an idea now largely rejected. [27] The skeleton was nicknamed the "Bollan Stegosaurus" and is in the collections of the Dinosaur Journey Museum. The name Stegosaurus roughly translates to roof lizard, which only makes sense if you know what they look like! Xing, L., Lockley, M. G., PERSONS IV, W. S., Klein, H., Romilio, A., Wang, D., & Wang, M. (2021). 23. These creatures are most often encountered in herds, which are vicious enough as a group that only the most brazen predators dare attack them. The stegosaurus is an immense yet stupid herbivore often found in the plains and jungles, where it feasts on grasses, plants, and leaves. (Tyrannosaurus Rex) How many fingers did Tyrannosaurus have? These may have been some kind of proto-feathers, perhaps brightly colored to attract a mate or intimidate a rival, or . [58] More recently, a study of the tail spikes by McWhinney et al.,[84] which showed a high incidence of trauma-related damage, lends more weight to the position that the spikes were indeed used in combat. 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? However, their teeth and jaws are very different from those of other herbivorous ornithischian dinosaurs, suggesting a different feeding strategy that is not yet well understood. Spinosaurus had a huge sail on its back. 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. [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. Now the presence of feathers has been documented in velociraptor, one of the most iconic of dinosaurs and a close relative of. The lower jaw had flat downward and upward extensions that would have completely hidden the teeth when viewed from the side, and these probably supported a turtle-like beak in life. Researchers found many North American specimens in Colorado, Utah, and Wyoming. They do estimate that they fed on a number of different plant types, including ferns, moss, fruits, cycads, conifers, and horsetails. [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. Chure, Daniel J.; Litwin, Ron; Hasiotis, Stephen T.; Evanoff, Emmett; and Carpenter, Kenneth (2006). 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. Did T Rexes Have Feather? 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. In Foster, John R.; and Lucas, Spencer G. However, as Carpenter[25] has noted, the plates overlap so many tail vertebrae, movement would be limited. Did stegosaurus have feathers? [7] The other, Stegosaurus sulcatus, was named based on a left forelimb, scapula, left femur, several vertebrae, and several plates and dermal armor elements (USNM V 4937) collected in 1883. [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. 2. These are presumed to have served as defensive weapons, but they may have been ornamental. [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. This suggests it could not walk very fast, as the stride of the back legs at speed would have overtaken the front legs, giving a maximum speed of 15.317.9km/h (9.511.1mph). The Stegosaurus, an armored dinosaur with bony plates running along its backbone and ending in a giant spiked tail, had large space at the end of the spinal cord. According to paleontologist and National Geographic grantee Jack Horner, it stands to reason that dinosaurs had similar courting behaviors as today's birds. 2. Its head was held low and its stiff tail was poised high in the air. Due to their distinctive combination of broad, upright plates and tail tipped with spikes, Stegosaurus is one of the most recognizable kinds of dinosaurs. The bony plates on Stegosaurus's back were set . Did Ankylosaurus have feathers? . The spikes were probably used as defense mechanisms, while it is . Which of the following features did Archaeopteryx not have? Despite its popularity in books and film, mounted skeletons of Stegosaurus did not become a staple of major natural history museums until the mid-20th century, and many museums have had to assemble composite displays from several different specimens due to a lack of complete skeletons. Today, it is generally agreed that their spiked tails were most likely used for defense against predators, while their plates may have been used primarily for display, and secondarily for thermoregulatory functions. However, this mount was dismantled in 1917 when the old Peabody Museum building was demolished. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. Stegosaurus, one of the many dinosaurs described in the Bone Wars, was first collected by Arthur Lakes and consisted of several caudal vertebrae, a dermal plate, and several additional postcranial elements that were collected north of Morrison, Colorado at Lakes YPM Quarry 5.
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