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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,231 Views) | |
| Wolf Eagle | Jan 7 2012, 02:16 AM Post #1 |
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M E G A P H Y S E T E R
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Tyrannosaurus rex Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex (rex meaning "king" in Latin), commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with 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, 67 to 65.5 million years ago.[1] It was 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 the large and powerful hindlimbs, Tyrannosaurus forelimbs were small, though unusually powerful for their size, and bore two clawed digits. Although other theropods rivaled or exceeded Tyrannosaurus rex in size, it was the largest known tyrannosaurid and one of the largest known land predators. By far the largest carnivore in its environment, Tyrannosaurus rex may have been an apex predator, preying upon hadrosaurs and ceratopsians, although some experts have suggested it was primarily a scavenger. The debate over Tyrannosaurus as apex predator or scavenger is among the longest running in paleontology. Tyrannosaurus rex was one of the largest land carnivores of all time; the largest complete specimen, FMNH PR2081 ("Sue"), measured 12.8 metres (42 ft) long, and was 4.0 metres (13.1 ft) tall at the hips. Mass estimates have varied widely over the years, from more than 7.2 metric tons (7.9 short tons), to less than 4.5 metric tons (5.0 short tons), with most modern estimates ranging between 5.4 and 6.8 metric tons (6.0 and 7.5 short tons). Packard et al. (2009) tested dinosaur mass estimation procedures on elephants and concluded that dinosaur estimations are flawed and produce over-estimations; thus, the weight of Tyrannosaurus could be much less than usually estimated. Other estimations have concluded that the largest known Tyrannosaurus specimens had a weight exceeding 9 tonnes. ![]() Spinosaurus aegyptiacus Spinosaurus is a genus of theropod dinosaur which lived in what is now North Africa, from the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago. Spinosaurus may be the largest of all known carnivorous dinosaurs, even larger than Tyrannosaurus and Giganotosaurus. Estimates published in 2005 and 2007 suggest that it was 12.6 to 18 metres (41 to 59 ft) in length and 7 to 20.9 tonnes (7.7 to 23.0 short tons) in weight. The skull of Spinosaurus was long and narrow like that of a modern crocodilian. Spinosaurus is thought to have eaten fish; evidence suggests that it lived both on land and in water like a modern crocodilian. The distinctive spines of Spinosaurus, which were long extensions of the vertebrae, grew to at least 1.65 meters (5.4 ft) long and were likely to have had skin connecting them, forming a sail-like structure, although some authors have suggested that the spines were covered in fat and formed a hump. Multiple functions have been put forward for this structure, including thermoregulation and display. Dal Sasso et al. (2005) assumed that Spinosaurus and Suchomimus had the same body proportions in relation to their skull lengths, and thereby calculated that Spinosaurus was 16 to 18 meters (52 to 59 ft) in length and 7 to 9 tonnes (7.7 to 9.9 short tons) in weight. The Dal Sasso et al. estimates were criticized because the skull length estimate was uncertain, and (assuming that body mass increases as the cube of body length) scaling Suchomimus which was 11 meters (36 ft) long and 3.8 tonnes (4.2 short tons) in mass to the range of estimated lengths of Spinosaurus would produce an estimated body mass of 11.7 to 16.7 tonnes (12.9 to 18.4 short tons).
Edited by Taipan, Apr 24 2015, 10:10 PM.
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| dino-ken | Mar 11 2013, 08:48 AM Post #2251 |
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Herbivore
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Actually T.rex's maximum bit force has been estimated at nearly 6 metric tons, not 4 tons. But to call it the strongest of all Theropods is ... a baseless assumption. Yes - it is the most powerful member of the Tyrannosaur, and the coelurosaurs - but that's because it is the largest species of both. And it may have the most powerful bite force of any known theropod. But that doesn't mean it's the strongest or largest theropod. |
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| Ausar | Mar 11 2013, 10:28 AM Post #2252 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Spino's bite MAY have come close to T.rex's minimum bite force. So don't think Spinosaurus couldn't give off a nasty bite as well. Edited by Ausar, Mar 11 2013, 10:37 AM.
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| dinosaur | Mar 11 2013, 03:05 PM Post #2253 |
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Heterotrophic Organism
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That's a fact right there But all these people are very ignorant. I told them the same thing, but they wanna have it their way. Also, they should ask themselves this, if spinosaurus only hunted fish and small dinos, why do they think a spinosaurus would win against a powerful, better armed, and better skilled tyrannosaurus? |
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| SpinoInWonderland | Mar 11 2013, 07:10 PM Post #2254 |
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The madness has come back...
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So theropods are synonymous with Tyrannosauroidea then? Really now? |
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| mega t.rex the magnificent | Mar 12 2013, 12:20 PM Post #2255 |
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Autotrophic Organism
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I will favor t.rex on this one. |
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| Shaochilong | Mar 12 2013, 12:32 PM Post #2256 |
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Herbivore
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Yeah, we're the ignorant ones when we constantly post supporting evidence, while you rely on your imagination and what is arguably the worst dinosaur documentary of all time. Makes perfect sense, right? |
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| SpinoInWonderland | Mar 12 2013, 12:57 PM Post #2257 |
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The madness has come back...
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It would be better if everyone put that dinosaur guy on ignore...he's completely hopeless, he places baseless child imagination and cherry-picked inaccuracies over evidence... |
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| dinosaur | Mar 12 2013, 01:55 PM Post #2258 |
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Heterotrophic Organism
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@ brolyeuphyfusion Why is this forum letting u Do this? I also saw one of ur videos called tyrannosaurus vs spinosaurus the truth. And most of the youtubers disagreed with u and offended u somehow. U tried ur best to show the people ur truth, but it didn't work! see? u ain't got Nothing on me! |
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| theropod | Mar 12 2013, 09:07 PM Post #2259 |
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palaeontology, open source and survival enthusiast
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totally agreed. Is it just me or does this debate become more and more absurd? T. rex a shapeless lump of muscles... please, where lies the problem with banning Dinosaur? After all Taipan doesn't have problems banning people who do not post BS in every post, so why not this dinosaur guy? |
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| theropod | Mar 12 2013, 09:10 PM Post #2260 |
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palaeontology, open source and survival enthusiast
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So to make this clear: T. rex was not the strongest of all theropods. t. rex was not the largest. It is possible it had the strongest bite, and the bulkiest built. That's all. Several other theropods surpass it in size, including weight, which means muscle mass and thus strenght. Several other theropods have bites that are equally formidable tough not by the means of a tremendous pressure that is generated by the adductor muscles. |
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| Temnospondyl | Mar 12 2013, 09:19 PM Post #2261 |
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Stegocephalia specialist.
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I disagree with many people who belive in 9.5 ton Sue. A 9 ton T-Rex would look like this: ![]() Tyrannosaurus Sue was more likely 6 tons. And 12 tons is a bit too much for Spino. According to PD, it was 11 t. Edited by Temnospondyl, Mar 12 2013, 09:21 PM.
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| Spinodontosaurus | Mar 12 2013, 10:23 PM Post #2262 |
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Herbivore
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Well, several theropods roughly matched it in size, that's for sure. Not sure if I agree with several being larger, but whatever. |
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| SpinoInWonderland | Mar 13 2013, 12:05 AM Post #2263 |
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The madness has come back...
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Actually even the bulkiest build of theropods doesn't belong to Tyrannosaurus. It goes to Therizinosaurus instead... |
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| MysteryMeat | Mar 13 2013, 12:30 AM Post #2264 |
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Herbivore
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That would be a 30 ton t. rex. Have you even checked out the paper? |
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| TheROC | Mar 13 2013, 01:55 AM Post #2265 |
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Herbivore
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PD said 11 tonnes. Which is 12 tons. Either way, its actually conservative if you scale it down to smaller sizes to see what the weight would be. |
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