Parasaurolophus (pronounced /ˌpærəsɔˈrɒləfəs/ PARR-ə-saw-ROL-ə-fəs, commonly also /ˌpærəˌsɔrəˈloʊfəs/ PARR-ə-SAWR-ə-LOH-fəs; meaning "near crested lizard" in reference to Saurolophus) is a genus of ornithopod dinosaur from the Late Cretaceous Period of what is now North America, about 76-73 million years ago. It was a herbivore that walked both as a biped and a quadruped. Three species are recognized: P. walkeri (the type species), P. tubicen, and the short-crested P. cyrtocristatus. Remains are known from Alberta, Canada, and New Mexico and Utah, USA. It was first described in 1922 by William Parks from a skull and partial skeleton in Alberta.
Parasaurolophus is a hadrosaurid, part of a diverse family of Cretaceous dinosaurs known for their range of bizarre head adornments. This genus is known for its large, elaborate cranial crest, which at its largest forms a long curved tube projecting upwards and back from the skull. Charonosaurus from China, which may have been its closest relative, had a similar skull and potentially a similar crest. The crest has been much discussed by scientists; the consensus is that major functions included visual recognition of both species and sex, acoustic resonance, and thermoregulation. It is one of the rarer duckbills, being known from only a handful of good specimens.
Parasaurolophus is among the most well-recognized dinosaurs, and is frequently portrayed in dinosaur-related television shows, movies, books, merchandise and other media.
Description[]

The size of Parasaurolophus walkeri compared to a human.
As is the case with most dinosaurs, the skeleton of Parasaurolophus is incompletely known. The length of the type specimen of P. walkeri is estimated at 9.5 meters (31 ft). Its skull is about 1.6 meters (5.2 ft) long, including the crest, whereas the type skull of P. tubicen is over 2.0 meters (6.6 ft) long, indicating a larger animal.[1] Its weight is estimated at 2.5 tonnes (2.7 tons).[2] Its single known forelimb was relatively short for a hadrosaurid, with a short but wide shoulder blade. The thighbone measures 103 centimeters (3.38 ft) long in P. walkeri and is robust for its length when compared to other hadrosaurids.[3] The upper arm and pelvic bones were also heavily built.[4]
Like other hadrosaurids, it was able to walk on either two legs or four. It probably preferred to forage for food on four legs, but ran on two.[5] The neural spines of the vertebrae were tall, as was common in lambeosaurines;[3] tallest over the hips, they increased the height of the back. Skin impressions are known for P. walkeri, showing uniform tubercle-like scales but no larger structures.[6]

Parasaurolophus walkeri with scalation detail.

Closeup of P. walkeri beak and teeth
The most noticeable feature was the cranial crest, which protruded from the rear of the head and was made up of the premaxilla and nasal bones. The P. walkeri type specimen has a notch in the neural spines near where the crest would hit the back, but this may be a pathology peculiar to this individual.[3] William Parks, who named the genus, hypothesized that a ligament ran from the crest to the notch to support the head.[6] Although the idea seems unlikely,[2] Parasaurolophus is sometimes restored with a skin flap from the crest to the neck.
The crest was hollow, with distinct tubes leading from each nostril to the end of the crest before reversing direction and heading back down the crest and into the skull. The tubes were simplest in P. walkeri, and more complex in P. tubicen, where some tubes were blind and others met and separated.[7] While P. walkeri and P. tubicen had long crests with only slight curvature, P. cyrtocristatus had a short crest with a more circular profile.[8]
Like Edmontosaurus, Parasaurolophus likely had pointed hooves. The elongated vertebrae on Parasaurolophus' spine supported a small sail, which was slightly arched. The large hollow crest on the head of Parasaurolophus is roughly one meter long, and ran down the face, and transitioned into the flat beak. For a hadrosaur, Parasaurolophus has relatively short forearms, a wide shoulder blade, and a heavily built pelvis and upper arm. P. walkeri has the classic crest, P. tubicen has a thicker crest and P. cyrtocristatus has a downturned crest similar to Tlatolophus[9]. In PaleoFest 2022, a slideshow presentation about the Grand Staircase and hadrosaur diversity talked about the presence of a P. sp. in the Kaiparowits Formation that overlaps with P. walkeri from the Dinosaur Park, and extends through the formation to the latest P. cyrtocristatus where it significantly overlaps. This morphotype has a crest morphology between the two mentioned species[10]. The hyoid, though undescribed, is large and suggests a developed tongue[11].
Classification[]
As its name implies, Parasaurolophus was initially thought to be closely related to Saurolophus because of its superficially similar crest.[6] However, it was soon reassessed as a member of the lambeosaurine subfamily of hadrosaurids—Saurolophus is an hadrosaurine.[12] It is usually interpreted as a separate offshoot of the lambeosaurines, distinct from the helmet-crested Corythosaurus, Hypacrosaurus, and Lambeosaurus.[5][13][14] Its closest known relative appears to be Charonosaurus, a lambeosaurine with a similar skull (but no complete crest yet) from the Amur region of northeastern China,[15] and the two may form a clade Parasaurolophini.[14] P. cyrtocristatus, with its short, rounder crest, may be the most basal of the three known Parasaurolophus species,[14] or it may represent subadult or female specimens of P. tubicen.[16]

Restoration of P. walkeri
The following cladogram is after the 2007 redescription of Lambeosaurus magnicristatus (Evans and Reisz, 2007):
Hadrosauridae |
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History[]
ROM 768, a partial skull and body missing most of the tail and hindlegs below the knees, is the holotype, found by a team from the University of Toronto in 1920 near Sand Creek in Alberta. It is from the Campanian Dinosaur Park, and named Parasaurolophus walkeri after Sir Byron Edmund Walker, the Chairman of the Board of Trustees of the Royal Ontario Museum where it was deposited, by William Parks. Only one partial skull was recovered from Dinosaur Park, with the genus notably rare in Alberta. 3 individuals from the same formation lacking skulls may be Parasaurolophus. Faunal lists mention P. walkeri in the Hell Creek Formation, which is Maastrichtian-aged. However, Sullivan and Williamson (1999) failed to mention this, and is obscure, with it likely being mistaken and the original meaning being the bank of Hell Creek, Missouri River. Charles H. Sternberg (1921) found P. tubicen type PMU.R1250, a partial skull, from the Kirtland Formation of New Mexico. It was sent to Uppsala, Sweden, where Carl Wiman (1931) named it as Parasaurolophus tubicen, meaning "trumpeter". NMMNH P-25100, a second and nearly-complete skull, was found in New Mexico in 1995, with Robert Sullivan and Thomas Williamson (1999) giving the genus a monographic treatment, reviewing anatomy and taxonomy. They also talked about what the crest was used for, where Williamson later published his taxonomic disagreement. John Ostrom (1961) described FMNH P-27393 from New Mexico as Parasaurolophus cyrtocristatus. This specimen includes a fragmentary skull and postcrania minus the feet, neck and parts of the tail. The name means "short-crested", found on top of the Fruitland Formation or (likely) the base of the Kirtland. David B. Weishampel and James A. Jensen (1979) described a partial skull, BYU 2467, from the Kaiparowits Formation. Since, more skulls have been discovered of this species, and its range has expanded.
Only one P. walkeri is referred, but more certainly exist. P. tubicen is the largest, having a long and straight crest, with an interior with an intensified complexity. P. cyrtocristatus is the latest and has a smaller, downturned crest that almost touches the neck. It was believed The latter was a juvenile of female form of P. walkeri or P. tubicen. However, age, distributor and anatomical features suggest it is distinct[9].
A cf. P. walkeri was identified from archived photos based on the pubis as being part of the cargo hold of the SS Mount Temple, a ship that sunk in the Atlantic in 1916 after a German submarine attacked her. The manifest were "hundreds" or "thousands" of unidentified fossils, 4 articulate hadrosaurs (one cf. P. walkeri, 2 Corythosaurus? or Prosaurolophus and a new species), a partial Champsosaurus skeleton (presumed; Sternberg's letters makes a typo), a Judithemys-like turtle (possibly a new species), a Boremys carapace, a Trionyx latus carapace, an unidentified hadrosaur skull and a fairly complete Chasmosaurus skull. All of these fossils were kept in the cargo hold and lost during the sinking. This cf. P. walkeri was recovered from a mystery quarry known as Quarry 196, which was discovered by Norwegian students who had listened to Darren Tanke talk about mystery quarries. Here, they recovered a negative glass plates that match photographs of the expedition, a marker that likely had a bright flag tied to it, a fragment of a Toronto newspaper, different styles of weaving, fragments mixed with plaster and burlap and eroded nails and wood used to build crates[17][18].
Dicovery and naming[]

Holotype specimen of P. walkeri, showing the pathologic v-shaped notch
Meaning "near crested lizard", the name Parasaurolophus is derived from the Greek para/παρα "beside" or "near", sauros/σαυρος "lizard" and lophos/λοφος "crest".[19] It is based on ROM 768, a skull and partial skeleton missing most of the tail and the hind legs below the knees, which was found by a field party from the University of Toronto in 1920 near Sand Creek along the Red Deer River in Alberta, Canada.[6] These rocks are now known as the Campanian-age Upper Cretaceous Dinosaur Park Formation. William Parks named the specimen P. walkeri in honor of Sir Byron Edmund Walker, Chairman of the Board of Trustees of the Royal Ontario Museum.[6] Parasaurolophus remains are rare in Alberta,[20] with only one other partial skull from (probably) the Dinosaur Park Formation,[21] and three Dinosaur Park specimens lacking skulls, possibly belonging to the genus.[22] In some faunal lists, there is a mention of possible P. walkeri material in the Hell Creek Formation of Montana, a rock unit of late Maastrichtian age.[23][24] This occurrence is not noted by Sullivan and Williamson in their 1999 review of the genus,[7] and has not been further elaborated upon elsewhere.
In 1921, Charles H. Sternberg recovered a partial skull (PMU.R1250) from what is now known as the slightly younger Kirtland Formation in San Juan County, New Mexico. This specimen was sent to Uppsala, Sweden, where Carl Wiman described it as a second species, P. tubicen, in 1931.[25] The specific epithet is derived from the Latin tǔbǐcěn "trumpeter".[26] A second, nearly complete P. tubicen skull (NMMNH P-25100) was found in New Mexico in 1995. Using computed tomography of this skull, Robert Sullivan and Thomas Williamson gave the genus a monographic treatment in 1999, covering aspects of its anatomy and taxonomy, and the functions of its crest.[7] Williamson later published an independent review of the remains, disagreeing with the taxonomic conclusions.[16]
John Ostrom described another good specimen (FMNH P27393) from New Mexico as P. cyrtocristatus in 1961. It includes a partial skull with a short, rounded crest, and much of the postcranial skeleton except for the feet, neck, and parts of the tail.[8] Its specific name is derived from the Latin curtus "shortened" and cristatus "crested".[26] The specimen was found in either the top of the Fruitland Formation or, more likely, the base of the overlying Kirtland Formation.[7] The range of this species was expanded in 1979, when David B. Weishampel and James A. Jensen described a partial skull with a similar crest (BYU 2467) from the Campanian-age Kaiparowits Formation of Garfield County, Utah.[27] Since then, another skull has been found in Utah with the short/round P. cyrtocristatus crest morphology.[7]
Species[]

Holotype skulls of the three species arranged by age
The type species P. walkeri, from Alberta, is known from a single specimen.[5] It differs from P. tubicen by having simpler tubes in its crest,[7] and from P. cyrtocristatus by having a long, unrounded crest and a longer upper arm than forearm.[8]
P. tubicen, from New Mexico, is known from the remains of at least three individuals.[5] It is the largest species, with more complex air passages in its crest than P. walkeri, and a longer, straighter crest than P. cyrtocristatus.[7]
P. cyrtocristatus, from New Mexico and Utah, is known from three possible specimens. It is the smallest species, with a short rounded crest.[7] Its small size and the form of its crest have led several scientists to suggest that it represents juveniles or females of P. tubicen, which is from roughly the same time and from the same formation in New Mexico. As noted by Thomas Williamson, the type material of P. cyrtocristatus is about 72% the size of P. tubicen, close to the size at which other lambeosaurines are interpreted to begin showing definitive sexual dimorphism in their crests (~70% of adult size).[16] This position has been rejected in recent reviews of lambeosaurines.[5][14] In January 25, 2021, a well-preserved skull of Parasaurolophus cyrtocristatus was founded and reveals the dinosaur evolution of bizarre crest.
Paleobiology[]

P. walkeri head with scalation detail.
The New Mexican species shared their environment with the duckbill Kritosaurus, horned Pentaceratops, armored Nodocephalosaurus, Saurornitholestes, and currently unnamed tyrannosaurids.[24] The Kirtland Formation is interpreted as river floodplains appearing after a retreat of the Western Interior Seaway. Conifers were the dominant plants, and chasmosaurine horned dinosaurs were apparently more common than hadrosaurids.[28]
Feeding[]
As a hadrosaurid, Parasaurolophus was a large bipedal/quadrupedal herbivore, eating plants with a sophisticated skull that permitted a grinding motion analogous to chewing. Its teeth were continually replacing and packed into dental batteries that contained hundreds of teeth, only a relative handful of which were in use at any time. It used its beak to crop plant material, which was held in the jaws by a cheek-like organ. Feeding would have been from the ground up to around 4 meters (13 feet) above.[5] As noted by Bob Bakker, lambeosaurines have narrower beaks than hadrosaurines, implying that Parasaurolophus and its relatives could feed more selectively than their broad-beaked, crestless counterparts.[29]
Crest[]
In 2021, remains of a P. cyrtocristatus skull, DMNH EPV.132300, revealed information about the interior of the peculiar Parasaurolophus crest. New research suggests the crest formed like many other hadrosaurs. The intricate shape showed how the animal breathed through eight feet of passage before going to the head. This feature likely resonated sound, which created a booming sound that communicated with other individuals. In 2017, a partial skull was recovered from the badlands of New Mexico. The area surrounding the skull shows that the rest of the body was once preserved, but has been worn down to the skull, several ribs and a mandible have survived until discovery. The fossil preserved the intricate bones in the crest, and is among the best-preserved P. cyrtocristatus skull [30]. A fully preserved P. cyrtocristatus skull is known from Utah, held at NHMU[31].
It was once thought the crest was used: as a snorkel, as a shoulder muscle anchor, regulation, resonating, species identification and as an anchor for a soft tissue frill. The snorkel was disproved due to no nostril at the tip and no nostril-closing muscles to retain air, archosaurs lack direct shoulder/crest muscle/ligament anchors and an unlikely presence of a crest frill. Behavioural and thermoregulatory functions, however, can not be disproved[9].
Cranial crest[]

Diagram showing internal features of the crest
Many hypotheses have been advanced as to what functions the cranial crest of Parasaurolophus performed, but most have been discredited.[2][32] It is now believed that it may have had several functions: visual display for identifying species and sex, sound amplification for communication, and thermoregulation. It is not clear which was most significant at what times in the evolution of the crest and its internal nasal passages.[33]
Differences between species and growth stages[]

Juvenile skeleton RAM 14000 (nicknamed Joe)
As for other lambeosaurines, it is believed that the cranial crest of Parasaurolophus changed with age and was a sexually dimorphic characteristic in adults. James Hopson, one of the first researchers to describe lambeosaurine crests in terms of such distinctions, suggested that P. cyrtocristatus, with its small crest, was the female form of P. tubicen.[34] Thomas Williamson suggested it was the juvenile form.[16] Neither hypothesis became widely accepted. As only six good skulls and one juvenile braincase are known, additional material will help clear up these potential relationships. Williamson noted that in any case, juvenile Parasaurolophus probably had small, rounded crests like P. cyrtocristatus, that probably grew faster as individuals approached maturity.[16] Recent restudy of a juvenile braincase previously assigned to Lambeosaurus, and now assigned to Parasaurolophus, provides evidence that a small tubular crest was present in juveniles. This specimen preserves a small upward flaring of the frontal bones that was similar to but smaller than what is seen in adult specimens; in adults, the frontals formed a platform that supported the base of the crest. This specimen also indicates that the growth of the crest in Parasaurolophus and the facial profile of juvenile individuals differed from the Corythosaurus-Hypacrosaurus-Lambeosaurus model, in part because the crest of Parasaurolophus lacks the thin bony 'coxcomb' that makes up the upper portion of the crest of the other three lambeosaurines.[21]

Reconstruction of a juvenile skeleton, based on RAM 14000
Rejected hypotheses about function[]

Diagram comparing the narial crests of Parasaurolophus cyrtocristatus (a) and Parasaurolophus walkeri (b).
Many early suggestions focused on adaptations for an aquatic lifestyle, following the hypothesis that hadrosaurids were amphibious, a common line of thought until the 1960s. Thus, Alfred Sherwood Romer proposed it served as a snorkel,[35] Martin Wilfarth that it was an attachment for a mobile proboscis used as a breathing tube or for food gathering,[36] Charles M. Sternberg that it served as an airtrap to keep water out of the lungs,[37] and Ned Colbert that it served as an air reservoir for prolonged stays underwater.[38]
Other proposals were more physical in nature. As mentioned above, William Parks suggested that it was joined to the vertebrae with ligaments or muscles, and helped with moving and supporting the head.[6] Othenio Abel proposed it was used as a weapon in combat among members of the same species,[39] and Andrew Milner suggested that it could be used as a foliage deflector, like the helmet crest (called a 'casque') of the cassowary.[32] Still other proposals made housing specialized organs the major function. Halszka Osmólska suggested that it housed salt glands,[40] and John Ostrom suggested that it housed expanded areas for olfactory tissue and much improved sense of smell of the lambeosaurines, which had no obvious defensive capabilities.[41] One unusual suggestion, made by creationist Duane Gish, is that the crest housed chemical glands that allowed it to throw jets of chemical "fire" at enemies, similar to the modern-day bombardier beetle.[42]
Most of these hypotheses have been discredited or rejected.[2] For example, there is no hole at the end of the crest for a snorkeling function. There are no muscle scars for a proboscis and it is dubious that an animal with a beak would need one. As a proposed airlock, it would not have kept out water. The proposed air reservoir would have been insufficient for an animal the size of Parasaurolophus. Other hadrosaurids had large heads without needing large hollow crests to serve as attachment points for supporting ligaments.[41] Also, none of the proposals explain why the crest has such a shape, why other lambeosaurines should have crests that look much different but perform a similar function, how crestless or solid-crested hadrosaurids got along without such capabilities, or why some hadrosaurids had solid crests. These considerations particularly impact hypotheses based on increasing the capabilities of systems already present in the animal, such as the salt gland and olfaction hypotheses,[32] and indicate that these were not primary functions of the crest. Additionally, work on the nasal cavity of lambeosaurines shows that olfactory nerves and corresponding sensory tissue were largely outside the portion of the nasal passages in the crest, so the expansion of the crest had little to do with the sense of smell.[33]
Social functions[]

Restoration of P. walkeri with hypothetical skin frill
Instead, social and physiological functions have become more supported as function(s) of the crest, focusing on visual and auditory identification and communication. As a large object, the crest has clear value as a visual signal, and sets this animal apart from its contemporaries. The large size of hadrosaurid eye sockets and the presence of sclerotic rings in the eyes imply acute vision and diurnal habits, evidence that sight was important to these animals. If, as is commonly illustrated, a skin frill extended from the crest to the neck or back, the proposed visual display would have been much showier.[34] As is suggested by other lambeosaurine skulls, the crest of Parasaurolophus likely permitted both species identification (such as separating it from Corythosaurus or Lambeosaurus) and determination between males and females, based on shape and size.[33]
Sounding function[]

Restoration of Charonosaurus, P. tubicen, P. walkeri, and P. cyrtocristatus
However, the external appearance of the crest does not correspond to the complex internal anatomy of the nasal passages, which suggests another function accounted for usage of the internal space.[33] Carl Wiman was the first to propose, in 1931, that the passages served an auditory signaling function, like a crumhorn;[25] Hopson and David B. Weishampel revisited this idea in the 1970s and 1980s.[34][43][44] Hopson found that there is anatomical evidence that hadrosaurids had strong hearing. There is at least one example, in the related Corythosaurus, of a slender stapes (reptilian ear bone) in place, which combined with a large space for an eardrum implies a sensitive middle ear. Furthermore, the hadrosaurid lagena is elongate like a crocodilian's, indicating that the auditory portion of the inner ear was well-developed.[34] Weishampel suggested that P. walkeri was able to produce frequencies of 48 to 240 Hz, and P. cyrtocristatus (interpreted as a juvenile crest form) 75 to 375 Hz. Based on similarity of hadrosaurid inner ears to those of crocodiles, he also proposed that adult hadrosaurids were sensitive to high frequencies, such as their offspring might produce. According to Weishampel, this is consistent with parents and offspring communicating.[43]
Computer modeling of a well-preserved specimen of P. tubicen, with more complex air passages than those of P. walkeri, has allowed the reconstruction of the possible sound its crest produced.[45] The main path resonates at around 30 Hz, but the complicated sinus anatomy causes peaks and valleys in the sound.[46]
Cooling function[]
The large surface area and vascularization of the crest also suggests a thermoregulatory function.[47] P.E. Wheeler first suggested this use in 1978 as a way keep the brain cool.[48] Teresa Maryańska and Osmólska also proposed thermoregulation at about the same time,[49] and Sullivan and Williamson took further interest. David Evans' 2006 discussion of lambeosaurine crest functions was favorable to the idea, at least as an initial factor for the evolution of crest expansion.[33]
Paleopathology[]

P. walkeri with notch in the vertebrae
The holotype of Parasaurolophus, a specimen housed at the ROM (ROM 768), shows countless pathological elements. One is an oral lesion possibly related to periodontal disease, calluses over fractures on three dorsal ribs, a discoidal formation above neural spines 6 and 7, a spine oriented towards the skull in spine 7 that merges with 6, a V-shaped indent in 7 and 8 spines and a projection on the ilium which projects ventrally and fuses with the lateral iliac process. The lesion supports the theory that the individual suffered many traumatic events during life. The most prominent one mostly affects the anterior thorax. Many lesions are extremely rare in hadrosaurs, and could lead towards insight to their paleobiology and paleoecology. The ilium and iliac-related injuries are still unclear as to what caused them, although it likely has to do with the injuries to the anterior thorax. The discoidal formation above spines 6 and 7 also appears to have been caused by the injuries to the thorax, likely representing post-traumatic ossification at the base of the nuchal ligament. The gap between 7 and 8 is likely a stressful point between the nuchal ligament, which pulled 7 forward and 8 back. This large gap may have been caused by a large object falling on them, such as a tree, as proposed by authors in a figure[9].
Paleoecology[]
Parasaurolophus lived in North America, with occurrences from Alberta, New Mexico, Utah and possibly Montana. P. walkeri are found in the Dinosaur Park Formation, P. cyrtocristatus and P. tubicen from the Fruitland Formation and other Parasaurolophus from the Kaiparowits Formation. There are rumors of a discovery in the Hell Creek Formation that paleontologists discovered remains of a lambeosaur, or possibly Parasaurolophus. If these rumors are true, it will expand the range of Parasaurolophus greatly[50][9]. However, the specimens associated from this formation, AMNH 5893, is reported from the "Pierre Formation" on the bank of Hell Creek, Missouri River, which may actually represent the Bearpaw Formation. If this is true, then the range of Parasaurolophus would nonetheless expand[51].
Alberta[]

P. walkeri in Dinosaur Park Formation environment
Parasaurolophus walkeri, from the Dinosaur Park Formation, was a member of a diverse and well-documented fauna of prehistoric animals, including well-known dinosaurs such as the horned Centrosaurus, Styracosaurus, and Chasmosaurus; fellow duckbills Prosaurolophus, Gryposaurus, Corythosaurus, and Lambeosaurus; tyrannosaurid Gorgosaurus; and armored Edmontonia and Euoplocephalus.[24] It was a rare constituent of this fauna.[20] The Dinosaur Park Formation is interpreted as a low-relief setting of rivers and floodplains that became more swampy and influenced by marine conditions over time as the Western Interior Seaway transgressed westward.[52] The climate was warmer than present-day Alberta, without frost, but with wetter and drier seasons. Conifers were apparently the dominant canopy plants, with an understory of ferns, tree ferns, and angiosperms.[53]
JPInstitute.com Description[]
Parasaurolophus was a very unique looking dinosaur. It had a very prominent crest atop its head that was almost six feet in length. This hollow tube was probably used to make sounds that may have allowed it to call to others in its herd. It was one of the largest plant-eaters of the Cretaceous Period.
Parasaurolophus would have walked primarily on all four legs, but it could have stood on its hind legs to feed or defend itself and used its long tail for balance. It had a fairly long neck that would have allowed it to find food on the ground or in trees. It was a member of family of dinosaurs we refer to as duckbills, meaning it had a hard beak in the front of its mouth and hundreds of teeth in the back for chewing tough plant material. These types of plant-eaters were most likely easy prey for the large predators of this time, so it probably found safety in numbers.
The long tube that makes up the crest is connected to the nostrils and the back of the throat of this dinosaur. It may have been able to make very loud sounds that could have been heard for miles.
Appearance in other media[]
Jurassic Park[]
- It made a few appearances in all of the Jurassic Park/World movies, as a herd member in the first movie, then some were being held captive by hunters in the second movie and herding with Corythosaurus in the third movie, and background dinosaurs in the fourth film and in the fifth film. In Jurassic World Fallen Kingdom, several Parasaurolophus were captured and taken to Lockwood Manor to be sold off in auction, but thanks to Owen, Claire, Franklin, Zia and Maisie, they would eventually escape the estate along with the other dinosaurs. In Jurassic World Domion, Parasaurolophus had a few edits to the head, and the body is a bit bulkier. A small herd is present in the Biosyn Sanctuary in the Dolomite Mountains.
Read more Parasaurolophus on Jurassic Park Wiki |
The Land Before Time[]
Read more Parasaurolophus on Land Before Time Wiki |
We're Back! A Dinosaur's Story[]
- The character Dweeb in "We're Back! A Dinosaur's Story," is a Parasaurolophus himself. Unlike the real, herbivorous animal, Dweeb loves eating hot dogs.
Links[]
References[]
- ↑ Lull, Richard Swann Wright, Nelda E. Hadrosaurian Dinosaurs of North America, page 229. Published: 1942, Geological Society of America, Geological Society of America Special Paper 40
- ↑ 2.0 2.1 2.2 2.3 Glut, Donald F. Dinosaurs: The Encyclopedia, Chapter: Parasaurolophus, pages 678–684. Published: 1997, McFarland & Co, in Jefferson, North Carolina. ISBN 0-89950-917-7
- ↑ 3.0 3.1 3.2 Lull and Wright, Hadrosaurian Dinosaurs of North America, pp. 209-213.
- ↑ Brett-Surman, Michael K. and Wagner, Jonathan R. Carpenter, Kenneth (ed.) Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs, chapter: Appendicular anatomy in Campanian and Maastrichtian North American hadrosaurids, pages 135–169. Published, 2006, Indiana University Press, in Bloomington and Indianapolis ISBN 0-253-34817-X
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Horner, John R., Weishampel, David B.; and Forster, Catherine A, Weishampel, David B.; Osmólska, Halszka; and Dodson, Peter (eds.) The Dinosauria, 2nd edition, chapter: Hadrosauridae, pages 438-463. Published: 2004, University of California Press, in Berkeley. ISBN 0-520-24209-2
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Parks, William A. Parasaurolophus walkeri, a new genus and species of crested trachodont dinosaur, volume 13, pages 1-32. Published: 1922, University of Toronto Studies, Geology Series.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 Sullivan, Robert M. and Williamson, Thomas E. A new skull of Parasaurolophus (Dinosauria: Hadrosauridae) from the Kirtland Formation of New Mexico and a revision of the genus, from the series New Mexico Museum of Natural History and Science Bulletin, 15, pages 1-52. Published: 1999, New Mexico Museum of Natural History and Science, in Albuqueque, New Mexico.
- ↑ 8.0 8.1 8.2 Ostrom, John H. 1961 A new species of hadrosaurian dinosaur from the Cretaceous of New Mexico, Journal of Paleontology, Volume 35, 3rd issue, on pages 575–577.
- ↑ 9.0 9.1 9.2 9.3 9.4 https://en.wikipedia.org/wiki/Parasaurolophus
- ↑ https://twitter.com/ToddRockford/status/1500294785143390208/photo/3
- ↑ https://twitter.com/DavidEvans_ROM/status/1537770916628910083
- ↑ Gilmore, Charles W., On the genus Stephanosaurus, with a description of the type specimen of Lambeosaurus lambei, volume 38, issue 43, pages 29-48, Parks. Published: 1924, Canada Department of Mines Geological Survey Bulletin (Geological Series)
- ↑ Weishampel, David B. and Horner, Jack R., Weishampel, David B.; Osmólska, Halszka; and Dodson, Peter (eds.) The Dinosauria, 1st edition, Chapter: Hadrosauridae, pages 534-561. Published: 1990, University of California Press in Berkeley. ISBN 0-520-06727-4
- ↑ 14.0 14.1 14.2 14.3 Evans, David C., and Reisz, Robert R. 2007. Anatomy and relationships of Lambeosaurus magnicristatus, a crested hadrosaurid dinosaur (Ornithischia) from the Dinosaur Park Formation, Alberta, from the Journal of Vertebrate Paleontology, vol. 27 issue 2, on pages 373–393. [1]
- ↑ Godefroit, Pascal, Shuqin Zan; and Liyong Jin. 2000. Charonosaurus jiayinensis n. g., n. sp., a lambeosaurine dinosaur from the Late Maastrichtian of northeastern China, from the Compte Rendus de l'Academie des Sciences, Paris, Sciences de la Terre et des planètes, vol. 330, pages 875–882.
- ↑ 16.0 16.1 16.2 16.3 16.4 Williamson, Thomas E. 2000. Review of Hadrosauridae (Dinosauria, Ornithischia) from the San Juan Basin, New Mexico Lucas, S.G.; and Heckert, A.B. (eds.) Dinosaurs of New Mexico, from the New Mexico Museum of Natural History and Science Bulletin, 17 Published by New Mexico Museum of Natural History and Science, in Albuqueque, New Mexico. Pages 191–213.
- ↑ https://www.youtube.com/watch?v=mS7iq7LJ1MA&ab_channel=RoyalTyrrellMuseumofPalaeontology
- ↑ https://en.wikipedia.org/wiki/SS_Mount_Temple#Sinking
- ↑ Liddell, Henry George and Robert Scott, 1980. A Greek-English Lexicon (Abridged Edition) Published: Oxford University Press in the United Kingdom. ISBN 0-19-910207-4
- ↑ 20.0 20.1 Ryan, Michael J. and Evans, David C., Currie, Phillip J., and Koppelhus, Eva (eds.). Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed, Chapter: Ornithischian Dinosaurs. 2005, Published: Indiana University Press, in Bloomington. Pages 312–348, ISBN 0-253-34595-2
- ↑ 21.0 21.1 Evans, David C., Reisz, Robert R.; and Dupuis, Kevin, 2007. A juvenile Parasaurolophus braincase from Dinosaur Provincial Park, Alberta, with comments on crest ontogeny in the genus. Journal of Vertebrate Paleontology, vol. 27, issue 3 pages 642–650.
- ↑ Currie, Phillip J; and Russell, Dale A. "Geographic and stratigraphic distribution of dinosaur remains" in Dinosaur Provincial Park, p. 553.
- ↑ Weishampel, David B. (1990). "Dinosaur Distribution", in The Dinosauria (1st), pp. 63–139.
- ↑ 24.0 24.1 24.2 Weishampel, David B.; Barrett, Paul M.; Coria, Rodolfo A.; Le Loeuff, Jean; Xu Xing; Zhao Xijin; Sahni, Ashok; Gomani, Elizabeth, M.P.; and Noto, Christopher R. (2004). "Dinosaur Distribution", in The Dinosauria (2nd), pp. 517–606.
- ↑ 25.0 25.1 Wiman, Carl, 1931. Parasaurolophus tubicen, n. sp. aus der Kreide in New Mexico, from the Nova Acta Regia Societas Scientarum Upsaliensis, series 4, vol. 7, issue 5. (German). Pages 1–11.
- ↑ 26.0 26.1 Simpson, D.P. Cassell's Latin Dictionary, published by Cassell Ltd. 1979, edition 5, in London. ISBN 0-304-52257-0 Page 883.
- ↑ Weishampel, David B. and Jensen, James A. 1979. Parasaurolophus (Reptilia: Hadrosauridae) from Utah, from the Journal of Paleontology, vol. 53, issue 6, pages 1422–1427.
- ↑ Russell, Dale A. An Odyssey in Time: Dinosaurs of North America, 1989. Publisher: NorthWord Press, in Minocqua, Wisconsin. ISBN 1-55971-038-1 Pages 160–164.
- ↑ Bakker, Robert T. 1986. The Dinosaur Heresies: New Theories Unlocking the Mystery of the Dinosaurs and their Extinction, published by William Morrow, in New York. ISBN 0-8217-2859-8 Page 194.
- ↑ https://www.dmns.org/press-room/press-releases/parasaurolophus/
- ↑ https://t.co/LEd4vPMWT9?amp=1
- ↑ 32.0 32.1 32.2 Norman David B. The Illustrated Encyclopedia of Dinosaurs: An Original and Compelling Insight into Life in the Dinosaur Kingdom, chapter: Hadrosaurids II. 1985. Published by Crescent Books, in New York. Pages 122–127. ISBN 0-517-468905
- ↑ 33.0 33.1 33.2 33.3 33.4 Evans, David C., 2006. Nasal cavity homologies and cranial crest function in lambeosaurine dinosaurs, from the Journal of Paleobiology, vol. 32, issue 1, Pages 109–125. [2]
- ↑ 34.0 34.1 34.2 34.3 Hopson, James A. 1975. The evolution of cranial display structures in hadrosaurian dinosaurs , from the Journal of Paleobiology, volume one, issue one, pages 21–43.
- ↑ Romer. Alfred Sherwood, 1933. Vertebrate Paleontology, from the University of Chicago Press, on page 491.
- ↑ Wilfarth, Martin, 1947. Russeltragende Dinosaurier, from the Journal of Orion (Munich), vol. 2. pp. 525–532 (German language).
- ↑ Sternberg, Charles M. 1935. Hooded hadrosaurs of the Belly River Series of the Upper Cretaceous from the Journal of the Canada Department of Mines Bulletin (Geological Series), volume 77, issue 52, on pages 1–37.
- ↑ Colbert, Edwin H. The Dinosaur Book: The Ruling Reptiles and their Relatives, published in 1945 by the American Museum of Natural History, Man and Nature Publications, 14, in New York. Page 156.
- ↑ Abel, Othenio, 1924. Die neuen Dinosaurierfunde in der Oberkreide Canadas from the Journal of Jarbuch Naturwissenschaften, volume 12, issue 36, on pages 709–716. (German) 1924.
- ↑ Osmólska, Halszka, 1979. Nasal salt glands in dinosaurs, from the Journal of Acta Palaeontologica Polonica, vol. 24, pages 205–215.
- ↑ 41.0 41.1 Ostrom, John H., 1962. The cranial crests of hadrosaurian dinosaurs, from the Journal of Postilla, vol. 62, pages 1–29.
- ↑ Gish, Duane T., 1992. Dinosaurs by Design, published by Master Books, in Green Forest. ISBN 0-89051-165-9 Page 82.
- ↑ 43.0 43.1 Weishampel, David B., 1981. Acoustic analyses of potential vocalization in lambeosaurine dinosaurs (Reptilia:Ornithischia), from the Journal of Paleobiology, vol. 7, issue 2, pp. 252–261.
- ↑ Weishampel David B., 1981. The nasal cavity of lambeosaurine hadrosaurids (Reptilia:Ornithischia): comparative anatomy and homologies, from the Journal of Paleontology, vol. 55, issue 5, pp. 1046–1057.
- ↑ Scientists Use Digital Paleontology to Produce Voice of Parasaurolophus Dinosaur, by the Sandia National Laboratories (1997-12-05). Retrieved on January 20th, 2009.
- ↑ Diegert, Carl F. and Williamson, Thomas E., 1998. A digital acoustic model of the lambeosaurine hadrosaur Parasaurolophus tubicen from the Journal of Vertebrate Paleontology, vol. 18, issue 3, Suppl. p. 38A.
- ↑ Sullivan, Robert M. and Williamson, Thomas E., 1996. A new skull of Parasaurolophus (long-crested form) from New Mexico: external and internal (CT scans) features and their functional implications, from the Journal of Vertebrate Paleontology, vol. 16, issue 3, Suppl. pp.68A.
- ↑ Wheeler, P.E., 1978. Elaborate CNS cooling structure in large dinosaurs Journal of Nature, vol. 275, on pp. 441–443.
- ↑ Maryańska, Teresa and Osmólska, Halszka, in 1979. Aspects of hadrosaurian cranial anatomy, from the Journal of Lethaia, vol. 12, on pp. 265–273.
- ↑ https://www.cambridge.org/core/journals/journal-of-paleontology/article/an-elongate-hadrosaurid-forelimb-with-biological-traces-informs-the-biogeography-of-the-lambeosaurinae/3AADDB876793B4A99950C56D74CE2CD8
- ↑ https://twitter.com/TylerGreenfieId/status/1503923840937869314
- ↑ Eberth, David A. 2005. "The geology", in Dinosaur Provincial Park, pp. 54-82.
- ↑ Braman, Dennis R., and Koppelhus, Eva B. 2005. "Campanian palynomorphs", in Dinosaur Provincial Park, pp. 101-130.