Template:Short description Template:Good article Template:Automatic taxobox
Corythosaurus (Template:IPAc-en;<ref>Template:Cite Merriam-Webster</ref> Template:Lit) is a genus of hadrosaurid "duck-billed" dinosaur from the Late Cretaceous period, about 77–75.7 million years ago, in what is now western North America. Its name is derived from the Greek word κόρυς, meaning "helmet", named and described in 1914 by Barnum Brown. Corythosaurus is now thought to be a lambeosaurine, thus related to Lambeosaurus, Nipponosaurus, Velafrons, Hypacrosaurus, and Olorotitan. Corythosaurus has an estimated length of Template:Convert and has a skull, including the crest, that is Template:Convert tall.
Corythosaurus is known from many complete specimens, including the nearly complete holotype found by Brown in 1911. The holotype skeleton is only missing the last section of the tail and part of the front legs, but was preserved with impressions of polygonal scales. Corythosaurus is known from many skulls with tall crests that resemble those of the cassowary and a Corinthian helmet. The most likely function of the crest is thought to be vocalization. As in a trombone, sound waves would travel through many chambers in the crest and then get amplified when Corythosaurus exhaled. One Corythosaurus specimen has even been preserved with its last meal in its chest cavity. Inside the cavity were remains of conifer needles, seeds, twigs, and fruits, suggesting that Corythosaurus probably fed on all of these.<ref>Template:Cite book</ref>
The two species of Corythosaurus are both present in slightly different levels of the Dinosaur Park Formation. Both still co-existed with theropods and other ornithischians, like Daspletosaurus, Brachylophosaurus, Parasaurolophus, Scolosaurus, and Chasmosaurus.
Discovery and speciesEdit
The first specimen, AMNH 5240, was discovered in 1911 by Barnum Brown in Red Deer River of Alberta and secured by him in the Fall of 1912.<ref>Lowell Dingus and Mark Norell, 2011 Barnum Brown: The Man Who Discovered Tyrannosaurus rex, University of California Press, p. 143</ref><ref name="brown1914p559" /> As well as an almost complete skeleton, the find was notable because impressions of much of the creature's skin had also survived.<ref name="brown1914p560" /> The specimen came from the Belly River Group of the province.<ref name="brown1914p559" /> The left or underside of the skeleton was preserved in carbonaceous clay, making it difficult to expose the skin to the elements.<ref name="brown1914p560" /> The skeleton was articulated and only missing about the last Template:Convert of the tail and front legs.<ref name="brown1914p560" /> Both scapulae and coracoids are preserved in position, but the rest of the front legs are gone (except for phalanges and pieces of the humeri, ulnae, and radii). Apparently, the remaining front legs were weathered or eroded away.<ref name="brown1914p560"/> Impressions of the integument were preserved covering over a large part of the skeleton’s outlining and shows the form of the body.<ref name="brown1914p560"/> Another specimen, AMNH 5338, was found in 1914 by Brown and Peter Kaisen. Both specimens are now housed in the American Museum of Natural History in their original death poses.<ref name="norrell2000p159"/>
The type species, Corythosaurus casuarius, was named by Barnum Brown in 1914, based on the first specimen collected by him in 1912. AMNH 5240 is thus the holotype. In 1916, the original author, Brown, published a more detailed description that was also based on AMNH 5338, which is therefore the plesiotype. Corythosaurus is among many lambeosaurines that possess crests and it was the crest that lends Corythosaurus its name. The generic name Corythosaurus is derived from the Greek κόρυθος,(korythos), "Corinthian helmet", and means "helmeted lizard".<ref name="norrell2000"/> The specific name, casuarius, refers to the cassowary, a bird with a similar skull crest. The full binomial of Corythosaurus casuarius thus means "Cassowary-like reptile, with a Corinthian helmet crest".<ref name="carnegie">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
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The two best preserved specimens of Corythosaurus, found by Charles H. Sternberg in 1912, were lost on December 6, 1916, while being carried by the SS Mount Temple to the United Kingdom during World War I. They were being sent to Arthur Smith Woodward, a paleontologist of the British Museum of Natural History in England, when the ship transporting them was sunk by the German merchant raider Template:SMS in the middle of the ocean.<ref name="sternberg1917">p. 495 in Tanke, D.H. & Carpenter, K. (2001).</ref>
There were formerly up to seven species described, including C. casuarius, C. bicristatus (Parks 1935), C. brevicristatus (Parks 1935), C. excavatus (Gilmore 1923), C. frontalis (Parks 1935), and C. intermedius (Parks 1923). In 1975, Peter Dodson studied the differences between the skulls and crests of different species of lambeosaurine dinosaurs. He found that the differences in size and shape may have actually been related to the sex and age of the animal. Only one species is currently recognized for certain, C. casuarius,<ref name=PD75 /> although C. intermedius has been recognized as valid in some studies. It is based on specimen ROM 776, a skull found by Levi Sternberg in 1920, was named by William Parks in 1923. Originally, he named it Stephanosaurus intermedius earlier that year.<ref>Template:Cite journal</ref> The specific name of C. intermedius is derived from its apparent intermediate position according to Parks.<ref name="parks1923">Template:Cite journal</ref><ref name="vecchia2013"/><ref name="campioneetal2013">Template:Cite journal</ref> C. intermedius lived at a slightly later time in the Campanian than C. casuarius and the two species are not identical, which supported the separation of them in a 2009 study.<ref name="ABS09"/> The invalid species, C. excavatus (specimen UALVP 13), was based on only a skull found in 1920 and wouldn't be reunited with the rest of its remains until 2012.<ref>Template:Cite journal</ref>
DescriptionEdit
SizeEdit
Benson et al. (2012) estimated that Corythosaurus has an average length of Template:Convert.<ref name="benson2012"/> In 1962, Edwin H. Colbert used models of specific dinosaurs, including Corythosaurus, to estimate their weight. The Corythosaurus model used was modelled by Vincent Fusco, after a mounted skeleton, and supervised by Barnum Brown. After testing, it was concluded that the average weight of Corythosaurus was Template:Convert.<ref name="colbert1962">Template:Cite journal</ref> The total length of Corythosaurus specimen AMNH 5240 was found to be Template:Convert long, with a weight close to Template:Convert.<ref name="seebacher2001">Template:Cite journal</ref> In 2016, Gregory S. Paul estimated that C. casuarius reached Template:Convert long and Template:Convert in weight and that C. intermedius reached Template:Convert in length and Template:Convert in weight.<ref>Template:Cite book</ref> A "morphologically adult-sized specimen" of C. casuarius measured approximately Template:Convert long.<ref>Template:Cite journal</ref>
Proportionally, the skull is much shorter and smaller than that of Edmontosaurus (formerly Trachodon), Kritosaurus, or Saurolophus. But, when including its crest, its superficial area is almost as large.<ref name="brown1914p561"/>
SkullEdit
Over twenty skulls have been found from this dinosaur. As with other lambeosaurines, the animal bore a tall, elaborate, bony crest atop its skull that contained the elongate narial passages.<ref name="ageofdinosaurscorythosaurus"/> The narial passages extended into the crest, first into separate pockets in the sides, then into a single central chamber, and onward into the respiratory system.<ref name="benson2012"/><ref name="ageofdinosaurscorythosaurus"/> The skull of the type specimen has no dermal impressions on it. During preservation, it was compressed laterally and the width is now about two-thirds of what it would have been in real life. According to Brown, the compression also caused the nasals to shift where they pressed down on the premaxillaries. Because they were pressed on the premaxillaries, the nasals would have closed the nares.<ref name="brown1914p561"/> Apart from the compression, the skull appears to be normal.<ref name="brown1914p561"/> Contrary to what Brown assumed, the areas concerned were fully part of the praemaxillae.
As aforementioned, the crests of Corythosaurus resemble that of a cassowary or a Corinthian helmet.<ref name="benson2012"/> They are formed by a combination of the praemaxillae, nasals, prefrontals, and frontals, as in Saurolophus, but instead of projecting backwards as a spine, they rise up to make the highest point above the orbit. The two halves of the crest are separated by a median suture. In front of the orbit, the crest is made of thick bone.<ref name="brown1914p561"/>
The nasals make up most of the crest. Brown assumed that they extended from the beaks' tip to the highest spot along the crest and that, unlike those in other genera, the nasals meet in the center and are not separated in front by an ascending premaxillary process. However, Brown mistook the praemaxillae for the nasals. The snout is actually largely formed by them and they do separate the nasals. Brown also thought that, on the top and back of the crest, the whole external face is covered by the frontals. Again he made a mistake, as what he assumed to be the frontals are in fact the nasals. The nasals end at the back of the squamosals in a hooked, short process.<ref name="brown1914p561"/> The prefrontals also make up part of the crest. However, Brown mistook the lower upper branch of the praemaxilla for the prefrontal. The actual prefrontal, which is triangular in shape, is located at the side of the crest base. It was seen by Brown as a part of the frontal. The real frontals, which are largely internal to the crest base structure, are not visible from the side.<ref>Weishampel, D.B., Dodson, P., Osmólska, H., & Hilton, Richard P., 2004, The Dinosauria. University of California Press. p. 450</ref>
The mouth of the holotype of Corythosaurus is narrow. The praemaxillae each form two long folds that enclose air passages extending the narial passages to the front of the snout. There, they end in narrow openings, sometimes called "pseudonares", which are false bony nostrils. These were mistaken by Brown for the real nares or nostrils. These are actually situated inside the crest, above the eye sockets. As in Saurolophus, the expanded portion of the premaxillary in front of the pseudonaris' opening is elongate. By comparison, the bill of Kritosaurus is short and the pseudonares extend far forward. At the end of the Corythosaurus bill, the two pseudonares unite into one.<ref name="brown1914p561"/> Because of his incorrect identification, Brown assumed that the holotype's inferior process of the premaxillary was shorter than in Kritosaurus and Saurolophus and that the process does not unite with the lacrimal, which is another difference from those genera.<ref name="brown1914p561"/> The praemaxilla actually does touch the lacrimal and extends to the rear until well behind the eye socket.
The lower jaw of the holotype is Template:Convert long and Template:Convert deep. The total length of the crest from the beak to the uppermost tip of the type specimen is Template:Convert, its total length is Template:Convert, and its height is Template:Convert.<ref name="brown1914p563"/>
Soft tissueEdit
In the holotype of C. casuarius, the sides and tail are covered in scales of several types. Polygonal tuberculate scales, covered in small bumps, vary in size across the body. Conical limpet-like scales are only preserved on a fold of skin preserved on the back of the tibia, but this was probably from the bottom of the belly instead of the leg.<ref name="brown1914p563"/> Separating the polygonal scales of C. casuarius are shieldlike scales, arranged close together in rows.<ref name="bell2013">Template:Cite journal</ref> Ossified tendons are present on all the vertebrae, except for those in the cervical region. On no vertebrae do the tendons extend below the transverse processes. Each tendon is flattened at its origin, transversely ovoid in the central rod, and ends at a rounded point.<ref name="brown1916p711"/>
Aside from those found on Corythosaurus casuarius, extensive skin impressions have been found on Edmontosaurus annectens and notable integument has also been found on Brachylophosaurus canadensis, Gryposaurus notabilis, Parasaurolophus walkeri, Lambeosaurus magnicristatus, L. lambei, Saurolophus angustirsotris, and on unidentified ornithopods. Of these, L. lambei, C. casuarius, G. notabilis, P. walkeri, and S. angustirsotris have preserved polygonal scales. The scales on L. lambei, S. angustirostris, and C. casuarius are all similar. Corythosaurus is one of very few hadrosaurids which have preserved skin impressions on the hind limbs and feet. A study in 2013 showed that, amongst hadrosaurids, Saurolophus angustirostris preserved the best and most complete foot and limb integument, although other species like S. osborni, Edmontosaurus annectens, and Lambeosaurus lambei (= L. clavinitialis) share a fair amount of preserved tissue on those regions.<ref name="bell2013"/>
It was once thought that this dinosaur lived mostly in the water, due to the appearance of webbed hands and feet.<ref name="brown1916p712"/> However, it was later discovered that the so-called "webs" were in fact deflated padding, much like that found on many modern mammals.<ref name="benson2012"/><ref name="Schmitz2011"/>
Distinguishing characteristicsEdit
A set of characters were indicated by Barnum Brown in 1914 to distinguish Corythosaurus from all other hadrosaurids from Alberta. These include a comparatively short skull with a high helmet-like crest formed by the nasals, prefrontals, and frontals; the nasals not being separated in front by the premaxillaries; a narrow beak with an expansion in front of an elongated naris; and a small narial opening.<ref name="brown1914p560"/>
In 1916, Brown expanded the character set to include even more features. In the revised version, these extra features include a comparatively short skull with a high helmet-like crest formed by nasals, prefrontals, and frontals; the nasals not being separated in front by premaxillaries; a narrow beak; expanded section in front of the elongated nares; a small narial opening; a vertebral formula of 15 cervicals, 19 dorsals, 8 sacrals, and 61+ caudals; possession of dorsal spines of a medium height; high anterior caudal spines; long chevrons; long scapulae that possess a blade of medium width; a radius considerably longer than the humerus; comparatively short metacarpals, an anteriorly decurved ilium; a long ischium with a foot-like terminal expansion; a pubis with an anterior blade that is short and broadly expanded at the end; a femur that is longer than the tibia; the phalanges of pes are short; that the integument over the sides and tail composed of polygonal tuberculate scales without pattern, but graded in size in different parts of the body; and a belly with longitudinal rows of large conical limpet-like scales separated by uniformly large polygonal tubercles.<ref name="brown1916p710"/> Again, the presumed traits of the snout are incorrect because Brown confused the praemaxillae with the nasal bones and the nasal bones with the frontals. Most of the postcranial traits are today known to be shared with various other lambeosaurines.
ClassificationEdit
Originally, Brown referred to Corythosaurus as a member of the family Trachodontidae<ref name="brown1914p559"/> (now Hadrosauridae<ref name="benson2012"/>). Inside Trachodontidae were the subfamilies Trachodontinae and Saurolophinae. Brown classified Hadrosaurus, Trachodon, Claosaurus, and Kritosaurus in Trachodontinae,<ref name="brown1914p564"/> whereas he classified Corythosaurus, Stephanosaurus, and Saurolophus in Saurolophinae.<ref name="brown1914p565"/>
Later, Brown revised the phylogeny of Corythosaurus, finding that it was closely related and possibly ancestral to Hypacrosaurus. The only differences he found between them were the development of the vertebrae and the proportions of the legs.<ref name="brown1916p710"/> During a study of dinosaurian ilia in the 1920s, Alfred Sherwood Romer proposed that the two orders of dinosaurs might have evolved separately and that birds, based on the shape and proportions of their ilia, might truly be specialized ornithischians. He used both Tyrannosaurus and Corythosaurus as a base model to analyze which theory is more likely true. He found that, even though birds are thought of as saurischians, it is very plausible for them to have evolved their specific pelvic musculature and anatomy if they evolved from ornithschians like Corythosaurus.<ref name="romer1923">Template:Cite journal</ref> However, even though the pelvic structure of Corythosaurus and other ornithischians does bear a greater superficial resemblance to birds than the saurischian pelvis does, birds are now known to be highly derived maniraptoran theropods.<ref name="benson2012"/>
Corythosaurus is currently classified as a hadrosaurid in the subfamily Lambeosaurinae. It is related to other hadrosaurs such as Hypacrosaurus, Lambeosaurus, and Olorotitan. With the exception of Olorotitan, they all share similar looking skulls and crests. However, research published in 2003 has suggested that even though it possesses a unique crest, Olorotitan is Corythosaurus's closest known relative.<ref name="GBA03" /> Benson et al. (2012) found that Corythosaurus was closely related to Velafrons, Nipponosaurus, and Hypacrosaurus, with them forming a group of fan-crested lambeosaurines.<ref name="benson2012"/>
In 2014, a study including the description of Zhanghenglong was published in the journal PLOS ONE. The study included an almost complete cladogram of hadrosauroid relationships, including Corythosaurus as the most derived lambeosaurine and being the sister taxon to Hypacrosaurus. The below cladogram is a simplified version including only Lambeosaurini.<ref name="zhanghenglong">Template:Cite journal</ref>
PaleobiologyEdit
Comparisons between the scleral rings of Corythosaurus and modern reptiles suggest that it may have been cathemeral, meaning it was most active throughout the day at short intervals.<ref name="Schmitz2011"/> The sense of hearing in hadrosaurids, specifically such as Lophorhothon, also seems to have been greatly developed because of an elongated lagena.<ref name="weishampel1981">Template:Cite journal</ref> The presence of a thin stapes (an ear bone that is rod-like in reptiles), combined with a large eardrum, implies the existence of a sensitive middle ear.<ref name="Schmitz2011"/> It is possible that hadrosaurid ears are sensitive enough to detect as much sound as a modern crocodilian.<ref name="weishampel1981"/>
Crest functionEdit
The internal structures of the crest of Corythosaurus are quite complex, making possible a call that could be used as a warning or for attracting a mate. Nasal passageways of Corythosaurus, as well as Hypacrosaurus and Lambeosaurus, are S-shaped, with Parasaurolophus only possessing U-shaped tubes.<ref name="weishampel1981"/> Any vocalization would travel through these elaborate chambers and probably get amplified.<ref name="benson2012"/><ref name="ageofdinosaurscorythosaurus"/> Scientists speculate that Corythosaurus could make loud, low pitched cries "like a wind or brass instrument",<ref name="ageofdinosaurscorythosaurus"/> such as a trombone.<ref name="norrell2000p35"/> The sounds could serve to alert other Corythosaurus to the presence of food or a potential threat from a predator.<ref name="ageofdinosaurscorythosaurus" /> The nasal passages emit low-frequency sounds when Corythosaurus exhaled. The individual crests would produce different sounds, so it is likely that each species of lambeosaurine would have had a unique sound.<ref name="norrell2000p35"/> However, even though the range for different lambeosaurine nasal passages vary greatly, they all probably made low-pitched sounds. This might be because low sounds (below 400 Hz) travel a set distance in any environment, while higher sounds (above 400 Hz) have a larger spread in the distance travelled.<ref name="weishampel1981"/>
When they were first described, crested hadrosaurs were thought to be aquatic,<ref name="norrell2000p35"/> an assessment based incorrectly on webbing that is now known to be padding.<ref name="benson2012"/><ref name="brown1916p712"/> The theory was that the animals could swim deep in the water and use the crest to store air to breath. However, it has now been proven that the crest did not have any holes in the end and the water pressure at even Template:Convert would be too great for the lungs to be able to inflate.<ref name="norrell2000p35">p. 35 in Norrell, M. et al. (2000).</ref>
GrowthEdit
Corythosaurus casuarius is one of a few lambeosaurines, along with Lambeosaurus lambei, Hypacrosaurus stebingeri, and H. altispinus, to have had surviving fossilized juveniles assigned to it. Juveniles are harder to assign to species because, at a young age, they lack the distinctive larger crests of adults. As they age, lambeosaurine crests tend to grow and become more prominent come maturity. In the Dinosaur Park Formation, over fifty articulated specimens have been found that come from many different genera. Among them, juveniles are hard to identify at the species level. Earlier, four genera and thirteen species were recognized from the formation's area when paleontologists used differences in size and crest shape to differentiate taxa. The smallest specimens were identified as Tetragonosaurus, now seen as a synonym of Procheneosaurus, and the largest skeletons were called either Corythosaurus or Lambeosaurus. An adult was even identified as Parasaurolophus.<ref name="evans2005"/> Small lambeosaurines from the Horseshoe Canyon Formation were referred to Cheneosaurus.<ref name="evans2005"/>
Corythosaurus started developing its crest when they were half the size of adults, but Parasaurolophus juveniles grew crests when they were only 25% as long as adults. Juvenile Corythosaurus, along with adults, had a premaxilla-nasal fontanelle. Young and adult Corythosaurus are similar to Lambeosaurus and Hypacrosaurus, but dissimilar to Parasaurolophus in that the sutures of the skull are sinuous, not smooth and straight. This feature helps to differentiate Parasaurolophini from Lambeosaurini. Generally, the crests of juveniles of lambeosaurines like Corythosaurus, Lambeosaurus, Hypacrosaurus stebingeri, parasaurolophines like Parasaurolophus, and primitive lambeosaurines like Kazaklambia are quite alike, although other features can be used to distinguish them.<ref name="farke2013">Template:Cite journal</ref>
Work by Dodson (1975) recognized that there were many less taxa present in Alberta.<ref name="PD75"/><ref name="evans2005"/> Tetragonosaurus was found to be juveniles of Corythosaurus or Lambeosaurus. T. erectofrons was assigned to Corythosaurus based largely on biometric information. The only non-typic specimen of Tetragonosaurus, assigned to T. erectofrons, was later found to be referable to Hypacrosaurus, although the holotype of the species was still found to be assignable to Corythosaurus.<ref name="evans2005"/>
DietEdit
Corythosaurus was an ornithopod, therefore being a herbivore. Benson et al. (2012) realized that the beak of Corythosaurus was shallow and delicate, concluding that it must have been used to feed upon soft vegetation. Based on the climate of the Late Cretaceous, they guessed that Corythosaurus would have been a selective feeder, eating only the juiciest fruits and youngest leaves.<ref name="benson2012"/> A Corythosaurus specimen has been preserved with its last meal in its chest cavity. Inside the cavity were remains of conifer needles, seeds, twigs, and fruits, meaning that Corythosaurus probably fed on all of these, implying that it was a browser.<ref name="norrell2000p41"/>
PaleoecologyEdit
Fossils have been found in the upper Oldman Formation and lower Dinosaur Park Formation of Canada.<ref>Template:Cite journal</ref> The Oldman Formation dates to the Campanian, about 77.5 to 76.5 million years ago,<ref name="ABS09"/> and the Dinosaur Park Formation dates from 76.6 to 74.8 million years ago.<ref name="ABS09"/><ref name="currie2005date"/> Corythosaurus lived from ~77–75.7 million years ago. In the Dinosaur Park Formation, C. casuarius lived from 76.6 to 75.9 mya, with C. intermedius living from 75.8 to 75.7 mya. In the Oldman Formation, C. casuarius, the only species of Corythosaurus from the deposits, lived about 77 to 76.5 mya.<ref name="ABS09"/> The holotype specimen was clearly a carcass that had floated up on a beach, as Unio shells, water-worn bones, and a baenid turtle were preserved all around it.<ref name="brown1916p709"/> Corythosaurus probably lived in a woodland forest and might have occasionally wandered into swampy areas.<ref name="benson2012"/>
A limited fauna is known from the upper section of the Oldman Formation and Corythosaurus casuarius, as well as C. intermedius, are among the taxa. Also from the section of the formation are the theropods Daspletosaurus and Saurornitholestes, the hadrosaurids Brachylophosaurus, Gryposaurus, and Parasaurolophus, the ankylosaurid Scolosaurus, and the ceratopsians Coronosaurus and Chasmosaurus. Other genera are known, but do not persist from the upper section of the formation, therefore not being contemporaries of Corythosaurus.<ref name="ABS09"/>
Corythosaurus casuarius is widespread throughout the lower unit of the Dinosaur Park Formation.<ref name=mallonetal2012>Template:Cite journal</ref> In it, Corythosaurus was found to be closely associated with the ceratopsid Centrosaurus apertus. Their associating was found in the Dinosaur Park, Judith River, and Mesaverde formations, as well as the Wind River Basin and the Wheatland County area.<ref name="province-endem-311"/> Corythosaurus lived alongside numerous other giant herbivores, such as the hadrosaurids Gryposaurus and Parasaurolophus, the ceratopsids Centrosaurus and Chasmosaurus, and the ankylosaurids Scolosaurus, Edmontonia,<ref name="ABS09"/> and Dyoplosaurus<ref name="ABS09"/> in the earliest stages of the formation, Dyoplosaurus, Panoplosaurus,<ref name="ABS09"/> and Euoplocephalus in the middle age, and Euoplocephalus alone in later stages of the formation. Studies of the jaw anatomy and mechanics of these dinosaurs suggests they probably all occupied slightly different ecological niches in order to avoid direct competition for food in such a crowded eco-space.<ref name=mallonetal2012/> The only large predators known from the same levels of the formation as Corythosaurus are the tyrannosaurids Gorgosaurus libratus and an unnamed species of Daspletosaurus.<ref name=ABS09/>
Thomas M. Lehman has observed that Corythosaurus hasn't been discovered outside of southern Alberta, even though it is one of the most abundant Judithian dinosaurs in the region.<ref name="province-endem-311" /> Large herbivores like the hadrosaurs living in North America during the Late Cretaceous had "remarkably small geographic ranges" despite their large body size and high mobility.<ref name="province-endem-311" /> This restricted distribution strongly contrasts with modern mammalian faunas whose large herbivores' ranges "typical[ly] ... span much of a continent."<ref name="province-endem-311" />
See alsoEdit
FootnotesEdit
<references> <ref name="norrell2000">p. 158 in Norrell, M. et al. (2000).</ref> <ref name="brown1914p559">p. 559 in Brown, B. (1914).</ref> <ref name="brown1914p560">p. 560 in Brown, B. (1914).</ref> <ref name="norrell2000p159">p. 159 in Norrell, M. et al. (2000).</ref> <ref name=PD75>Template:Cite journal</ref> <ref name="vecchia2013">Template:Cite journal</ref> <ref name="brown1914p561">p. 561 in Brown, B. (1914).</ref> <ref name="brown1916p710">p. 710 in Brown, B. (1916).</ref> <ref name="brown1916p711">p. 711 in Brown, B. (1916).</ref> <ref name="benson2012">p. 345 in Benson et al. (2012).</ref> <ref name="brown1914p563">p. 563 in Brown, B. (1914).</ref> <ref name="brown1916p709">p. 709 in Brown, B. (1916).</ref> <ref name="norrell2000p41">p. 41 in Norrell, M. et al. (2000).</ref> <ref name="brown1916p712">pp. 712–715 in Brown, B. (1916).</ref> <ref name=GBA03>Template:Cite journal</ref> <ref name="brown1914p564">p. 564 in Brown, B. (1914).</ref> <ref name="brown1914p565">p. 565 in Brown, B. (1914).</ref> <ref name="ageofdinosaurscorythosaurus">Dodson, Peter & Britt, Brooks & Carpenter, Kenneth & Forster, Catherine A. & Gillette, David D. & Norell, Mark A. & Olshevsky, George & Parrish, J. Michael & Weishampel, David B. (1994). The Age of Dinosaurs. Publications International, LTD. p. 137. Template:ISBN.</ref> <ref name="evans2005">Template:Cite book</ref> <ref name="Schmitz2011">Template:Cite journal</ref> <ref name="currie2005date">pp. 54–82 in Currie, P.J. & Koppelhus, E.B. (2005).</ref> <ref name="ABS09">pp. 1117–1135 in Arbour, V.M. et al. (2009).</ref> <ref name="province-endem-311">pp. 310–328 in Tanke, D.H. & Carpenter, K. (2001).</ref> </references>
ReferencesEdit
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