Sex T-Rex and Friends is now in it’s third, after a successful debut in 2010. In addition to our own shows Sex T-Rex performs regularly all over Toronto and has been an official selection of the Toronto, Montreal, Ottawa, Austin & Big City Improv Festivals and the ImprovBoston Geek Week & Upright Citizen’s Brigade Del Close Marathon in NYC.
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Sex T-Rex. 1,637 likes · 2 talking about this. Award-Winning, genre-bending scripted shows and improv comedy. est. 2008
According to Frey, that would make our T. rex a male. And since our T. rex is slimmer than Sue, it might be that the more lightly built T. rexes were males. Sue, then, would be the right name. (The bones of a subadult found along with Sue would belong to a male.) And Stan, the T. rex Pete Larson excavated in 1991, is relatively slim, like our T. rex..Estimated Reading Time: 8 mins
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I read in THE COMPLETE T. REX by Horner and Lessem that Tyrannosaurus rex may come in two different forms -- larger females, smaller males. This theory came about when a croc researched discovered a way to sex a croc from its skeleton.
Sue the Tyrannosaur Has a Sexual Identity Crisis. Sue, the largest, most complete Tyrannosaurus rex in the world, lives at the Field Museum in Chicago. The specimen was named by Peter Larson, who ...Estimated Reading Time: 7 mins
Sues points out that paleobiologists today have enough evidence to distinguish males and females in some species, including T. rex. "The females of T. rex were apparently larger than the males.Estimated Reading Time: 4 mins
Here's perhaps the only t rex whose sex is known: T. Rex Was Pregnant, Bone Test Confirms It also boils down to the actual physical appearance. It's likely that the males would've been brighter, with more variation in pigmentation.
As T. rex specimens have been found from Saskatchewan to New Mexico, differences between individuals may be indicative of geographic variation rather than sexual dimorphism. The differences could also be age-related, with 'robust' individuals being older animals.
In , analysis of limb proportions by Persons and Currie suggested Nanotyrannus specimens to have differing cursoriality levels, potentially separating it from T. In a battle against a bull Triceratops , the Triceratops would likely defend itself by inflicting fatal wounds to the Tyrannosaurus using its sharp horns. One palaeontologist memorably described the huge, curved teeth of T. Bob Bakker also thinks T. Condorraptor Marshosaurus Piatnitzkysaurus Xuanhanosaurus? The authors themselves suggest that the estimate of 20, individuals is probably lower than what should be expected, especially when factoring in that disease pandemics could easily wipe out such a small population. Simultaneously, studies of living carnivores suggest that some predator populations are higher in density than others of similar weight such as jaguars and hyenas, which are similar in weight but have vastly differing population densities. Retrieved July 19, In , the litigation was settled in favor of Maurice Williams, the original land owner. Which raises another intriguing question. Responses Kirsi Do trexes have gender? Peter Dodson of the University of Pennsylvania has done a lot of work on the crests of lambeosaur duckbilled dinosaurs, showing how the crests probably varied within a species according to age and sex. Bucky is permanently displayed at The Children's Museum of Indianapolis. The M. Histology has also allowed the age of other specimens to be determined. Marsh, Stygivenator cristatus? That doesn't mean the big ones were males, the thin ones females. These and other skull-strengthening features are part of the tyrannosaurid trend towards an increasingly powerful bite, which easily surpassed that of all non-tyrannosaurids. Retrieved September 4, Osborn named the other specimen Dynamosaurus imperiosus in a paper in A study by Holly Woodward and colleagues showed the specimens referred to Nanotyrannus were all ontogenetically immature and found it probable that these specimens belonged to T. A study of this specimen's fossilized bones showed that Sue reached full size at age 19 and died at the age of 28, the longest estimated life of any tyrannosaur known. Hu , It is the only dinosaur that is commonly known to the general public by its full scientific name binomial name and the scientific abbreviation T. Dilophosaurus Dracovenator Cryolophosaurus? A lot of mammals turn out that way. From the s through the end of the s, Barnum's discoveries remained the only specimens of Tyrannosaurus , as the Great Depression and wars kept many paleontologists out of the field. Dracoraptor Podokesaurus. He says the namesake T. This suggests that the sense of smell was highly developed, and implies that tyrannosaurs could detect carcasses by scent alone across great distances. The Rise and Fall of the Dinosaurs. Hansen, D. The idea of dinosaur ectothermy was challenged by scientists like Robert T. Baryonyx Cristatusaurus Suchomimus Suchosaurus? Paleontologist Hans Larsson of McGill University in Montreal, who was not part of the studies, called the finds "a milestone", and suggested that dinosaurs could "enter the field of molecular biology and really slingshot paleontology into the modern world". October 12, Such thermoregulation may also be explained by gigantothermy , as in some living sea turtles. February 21, The Telegraph. Scientific Reports. Retrieved March 23, Tyrannosauroidea Central. So some researchers have suggested that there were actually two different kinds of tyrannosaurs we've been calling T. Retrieved March 13, Compsognathus Huaxiagnathus Juravenator? July 1, Retrieved January 4, Tyrannosaurus may have also inhabited Mexico's Lomas Coloradas formation in Sonora. Tarbosaurus bataar. A study conducted by Lawrence Witmer and Ryan Ridgely of Ohio University found that Tyrannosaurus shared the heightened sensory abilities of other coelurosaurs , highlighting relatively rapid and coordinated eye and head movements; an enhanced ability to sense low frequency sounds, which would allow tyrannosaurs to track prey movements from long distances; and an enhanced sense of smell. Bakker , Phil Currie , and Michael Williams, then the curator of paleontology at the Cleveland Museum of Natural History, where the original specimen was housed and is now on display.
When we compare Kathy Wankel's T. When you look at human skeletons, you can see a great many differences. No two human skeletons, or two dinosaur skeletons, look exactiy alike. And we know that human skeletons vary according to race and by sex as well. As for T. But it does seem that the creatures we call T. Some of them, including Kathy's T. Others were more robustiy built. So some researchers have suggested that there were actually two different kinds of tyrannosaurs we've been calling T. Osborn combined Dynamosaurus and T. Dale Russell, a Canadian dinosaur paleontologist, was the first modern scientist to suggest we were calling two different animals T. He thought Osborn's two names should have been kept separate. Dynamosaurus imperiosus would fit the more massive specimens like the one in Los Angeles; T. Bob Bakker also thinks T. Clearly, some T. He noticed some differences between them. The one in Los Angeles, for example, had unfused bones in its nose and not much of a bump over its eyes. As I mentioned, on human skulls, and those of many other animals including dinosaurs, skull bones aren't fused in young individuals. Ralph wasn't sure whether the Los Angeles skull was from a different sex or just a younger animal than others he'd examined, even though it didn't vary considerably in size from the other specimens. The biggest, most noticeable difference between the T. In the Los Angeles and Canadian T. In one of the American Museum skulls, the bump is hemisphere shaped. Looking at the bump through a display case, Ralph Molnar thinks it might be a plaster invention. The biggest bump is on the first T. On that animal the over-the-eye bump is peaked like the eave of a house. So maybe the bump was something that grew on all T rexes as they got older. Then again, it might be a feature of just the females or males. I suspect males had bigger bumps than females, and that the same was the case for features on other dinosaurs that might have been used for display. That's the way it is with horned animals today. Peter Dodson of the University of Pennsylvania has done a lot of work on the crests of lambeosaur duckbilled dinosaurs, showing how the crests probably varied within a species according to age and sex. You might figure that the ones with showy crests were the males, who need to display to attract a mate—that's how it is with birds, the descendants of carnivorous dinosaurs, and with rams and deer—but you really can't be sure which dinosaur sex got the headgear. Ralph didn't find any consistent pattern of variation between the T. But Ken Carpenter did when he looked at T. He says the namesake T. Their jaws are more massive, and they have bigger horns over the eyes and bigger teeth. Kathy Wankers T. Ken found several ways in which the T. For instance, the skinnier, "gracile" T. The bigger T. Skeletons of Tarbosaurus, T. So maybe there are two types of skeletons of animals we're calling T. But I think that before we create two different names for these animals, we have to resolve the question of whether the variation we see is just differences between males and females of one kind of animal, the one we call T. That doesn't mean the big ones were males, the thin ones females. That's our prejudice because, on average, men are bigger, women smaller. A lot of mammals turn out that way.
Peterson and his team found that Jane's skull showed healed puncture wounds on the upper jaw and snout which they believe came from another juvenile Tyrannosaurus. The eye sockets of tyrannosaurs are positioned so that the eyes would point forward, giving them binocular vision slightly better than that of modern hawks. Retrieved July 28, Dale Russell, a Canadian dinosaur paleontologist, was the first modern scientist to suggest we were calling two different animals T. The study, published by Kawabe and Hittori et al. On Valentine's Day, Discovery Channel answered those questions and more with something truly romantic: dinosaur sex. The first and second arches are the same size. Bibcode : RSOS The front pubic bone ended in an enormous pubic boot, longer than the entire shaft of the element. How many do we need? Download as PDF Printable version. The feeding habits, physiology , and potential speed of Tyrannosaurus rex are a few subjects of debate. Only a single T. Archived from the original on July 12, Uta Feierabend How can you tell the difference between t rex and tyrannosaurus? Tarbosaurus Tyrannosaurus Zhuchengtyrannus. Discovery Channel. Bucky is the first Tyrannosaurus to be found that preserved a furcula wishbone. The complete T. And it includes brand new CGI effects that bring life to one of the last mysteries of these great beasts. Abler observed that the serrations tiny protuberances on the cutting edges of the teeth are closely spaced, enclosing little chambers. New York: Kensington Publishing. Other evidence suggests hunting behavior in Tyrannosaurus. The full binomial therefore translates to "tyrant lizard the king" or "King Tyrant Lizard", emphasizing the animal's size and perceived dominance over other species of the time. Dynamosaurus imperiosus would fit the more massive specimens like the one in Los Angeles; T. June 1, The paired breast bones possibly were made of cartilage only. Currie compared T. The males, he argued, had a broader, more erect frill and a bump over the nose, while the females had a narrower, lower frill and a less distinct bump. According to the study, this is more than the lowest estimates for extant birds Stanley , the 1 metre 3. If they do, and they're all from one vicinity so that the size difference isn't caused by a slightly different gene pool, then the chances are you are looking at two sexes. October 12, Fossils are found in a variety of rock formations dating to the Maastrichtian age of the Upper Cretaceous period , 68 to 66 million years ago. True dimorphism means two distinct morphs, clearly separated from one another, not a smooth gradation of characteristics along a spectrum. Owing to the fragmentary nature of the Manospondylus vertebrae, Osborn did not synonymize the two genera, instead considering the older genus indeterminate. In the summer of , crews organized by Jack Horner discovered five Tyrannosaurus skeletons near the Fort Peck Reservoir. Marsh , Deinodon amplus? March 30, Geological Society of America. The study found that Tyrannosaurus' s relative brain size was still within the range of modern reptiles, being at most 2 standard deviations above the mean of non-avian reptile EQs. OCLC Cambridge : Cambridge University Press. Currently the material resides in the research collections. Arkansaurus Calamosaurus? Getting back up again might have involved some stabilization from the diminutive forelimbs. The bone had been intentionally, though reluctantly, broken for shipping and then not preserved in the normal manner, specifically because Schweitzer was hoping to test it for soft tissue. Growth curves can be developed when the ages of different specimens are plotted on a graph along with their mass. According to studies published in by Charles Marshall et al. Archived from the original on May 30, Tyrannosaurus rex , the Tyrant King. July 25, Main article: Feeding behavior of Tyrannosaurus. A study conducted by Lawrence Witmer and Ryan Ridgely of Ohio University found that Tyrannosaurus shared the heightened sensory abilities of other coelurosaurs , highlighting relatively rapid and coordinated eye and head movements; an enhanced ability to sense low frequency sounds, which would allow tyrannosaurs to track prey movements from long distances; and an enhanced sense of smell.
Tyrannosaurus [nb 1] is a genus of tyrannosaurid theropod dinosaur. The species Tyrannosaurus rex rex meaning "king" in Latin , often called T. Tyrannosaurus lived throughout what is now western North America , on what was then an island continent known as Laramidia. Tyrannosaurus had a much wider range than other tyrannosaurids. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the Upper Cretaceous period , 68 to 66 million years ago. It was the last known member of the tyrannosaurids and among the last non- avian dinosaurs to exist before the Cretaceous—Paleogene extinction event. Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to its large and powerful hind limbs, the forelimbs of Tyrannosaurus were short but unusually powerful for their size, and they had two clawed digits. The most complete specimen measures up to Although other theropods rivaled or exceeded Tyrannosaurus rex in size , it is still among the largest known land predators and is estimated to have exerted the strongest bite force among all terrestrial animals. By far the largest carnivore in its environment, Tyrannosaurus rex was most likely an apex predator , preying upon hadrosaurs , juvenile armored herbivores like ceratopsians and ankylosaurs , and possibly sauropods. Some experts have suggested the dinosaur was primarily a scavenger. The question of whether Tyrannosaurus was an apex predator or a pure scavenger was among the longest debates in paleontology. Most paleontologists today accept that Tyrannosaurus was both an active predator and a scavenger. Specimens of Tyrannosaurus rex include some that are nearly complete skeletons. Soft tissue and proteins have been reported in at least one of these specimens. The abundance of fossil material has allowed significant research into many aspects of its biology, including its life history and biomechanics. The feeding habits, physiology , and potential speed of Tyrannosaurus rex are a few subjects of debate. Its taxonomy is also controversial, as some scientists consider Tarbosaurus bataar from Asia to be a second Tyrannosaurus species, while others maintain Tarbosaurus is a separate genus. Several other genera of North American tyrannosaurids have also been synonymized with Tyrannosaurus. As the archetypal theropod, Tyrannosaurus has been one of the best-known dinosaurs since the early 20th century and has been featured in film, advertising, postal stamps, and many other media. Teeth from what is now documented as a Tyrannosaurus rex were found in by Arthur Lakes near Golden, Colorado. In the early s, John Bell Hatcher collected postcranial elements in eastern Wyoming. The fossils were believed to be from the large species Ornithomimus grandis now Deinodon but are now considered T. In , Edward Drinker Cope found two vertebral fragments of a large dinosaur. Cope believed the fragments belonged to an "agathaumid" ceratopsid dinosaur, and named them Manospondylus gigas , meaning "giant porous vertebra", in reference to the numerous openings for blood vessels he found in the bone. Henry Fairfield Osborn recognized the similarity between Manospondylus gigas and T. Owing to the fragmentary nature of the Manospondylus vertebrae, Osborn did not synonymize the two genera, instead considering the older genus indeterminate. Brown found another partial skeleton in the Hell Creek Formation in Montana in , comprising approximately 34 fossilized bones. I have never seen anything like it from the Cretaceous ". Osborn used the Latin word rex , meaning "king", for the specific name. The full binomial therefore translates to "tyrant lizard the king" or "King Tyrant Lizard", emphasizing the animal's size and perceived dominance over other species of the time. Osborn named the other specimen Dynamosaurus imperiosus in a paper in From the s through the end of the s, Barnum's discoveries remained the only specimens of Tyrannosaurus , as the Great Depression and wars kept many paleontologists out of the field. The s saw numerous discoveries, with nearly twice as many finds as in all previous years, including two of the most complete skeletons found to date: Sue and Stan. The specimen Sue, named after the discoverer, was the object of a legal battle over its ownership. In , the litigation was settled in favor of Maurice Williams, the original land owner. A study of this specimen's fossilized bones showed that Sue reached full size at age 19 and died at the age of 28, the longest estimated life of any tyrannosaur known. In , Bucky Derflinger noticed a T. The specimen, dubbed Bucky in honor of its discoverer, was a young adult, 3. Bucky is the first Tyrannosaurus to be found that preserved a furcula wishbone. Bucky is permanently displayed at The Children's Museum of Indianapolis. In the summer of , crews organized by Jack Horner discovered five Tyrannosaurus skeletons near the Fort Peck Reservoir. The dig was concluded over 3 weeks in by the Black Hills Institute with the first live online Tyrannosaurus excavation providing daily reports, photos, and video. In , Montana State University revealed that it possessed the largest Tyrannosaurus skull yet discovered from a specimen named MOR , measuring 5 feet cm long. Two isolated fossilized footprints have been tentatively assigned to T. Originally thought to belong to a hadrosaurid , examination of the footprint revealed a large 'heel' unknown in ornithopod dinosaur tracks, and traces of what may have been a hallux , the dewclaw-like fourth digit of the tyrannosaur foot. The footprint was published as the ichnogenus Tyrannosauripus pillmorei in , by Martin Lockley and Adrian Hunt.