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| Giganotosaurus carolinii v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 31 2012, 05:48 PM (110,327 Views) | |
| Taipan | Jan 31 2012, 05:48 PM Post #1 |
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Giganotosaurus carolinii Giganotosaurus ("giant southern lizard"), was a carcharodontosaurid dinosaur that lived 93 to 89 million years ago during the Turonian stage of the Late Cretaceous period. It is one of the longest known terrestrial carnivores, bigger than Tyrannosaurus, but in length and weight, smaller than Spinosaurus. Although longer than T. rex, G. carolinii was lighter and had a much smaller braincase that was the size and shape of a banana. A well-developed olfactory region means it probably had a good sense of smell. Titanosaur fossils have been recovered near the remains of Giganotosaurus, leading to speculation that these carnivores may have preyed on the giant herbivores. Fossils of related carcharodontosaurid fossils grouped closely together may indicate pack hunting, a behavior that could possibly extend to Giganotosaurus itself. he holotype specimen's (MUCPv-Ch1) skeleton was about 70% complete and included parts of the skull, a lower jaw, pelvis, hindlimbs and most of the backbone. The premaxillae, jugals, quadratojugals, the back of the lower jaws and the forelimbs are missing. Various estimates find that it measured somewhere between 12.2 and 13 m (40 and 43 ft) in length, and between 6.5 and 13.3 tons in weight. A second, more fragmentary, specimen (MUCPv-95) has also been identified, found in 1987 by Jorge Calvo. It is only known from the front part of the left dentary which is 8% larger than the equivalent bone from the holotype. This largest Giganotosaurus specimen is estimated to represent an individual with a skull length of 195 cm (6.40 ft), compared to the holotype's estimated at 1.80 m (5.9 ft) skull, making it likely that Giganotosaurus had the largest skull of any known theropod. Giganotosaurus surpassed Tyrannosaurus in mass by at least half a ton (the upper size estimate for T. rex is 9.1 t). Additionally several single teeth, discovered from 1987 onwards, have been referred to the species. ![]() 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. 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. ![]() ______________________________________________________________________________
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| theropod | Oct 17 2015, 09:02 AM Post #421 |
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palaeontology, open source and survival enthusiast
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I think I already posted the results of doing the same with femur circumference, they are relatively similar, slightly lower than based on femur length (Larson 2008, n=15). Spinodontosaurus: Have you looked at other elements yet? Since femora are so much better sampled, it's definitely more likely that there is a systematic bias in the skull-only measurements than that there is one in the femora. PS: Did anyone else notice how the OP text has somehow lost any semblance of internal consistency? Edited by theropod, Oct 17 2015, 09:08 AM.
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| Maximus | Dec 30 2015, 06:51 AM Post #422 |
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Heterotrophic Organism
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T rex wins 6/10 Giga is slightly bigger but t rex is stronger both have equally deadly bites. T rex wins 6/10 Giga is slightly bigger but t rex is stronger both have equally deadly bites. Edited by Maximus, Dec 30 2015, 06:53 AM.
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| Darker | Jan 3 2016, 11:06 AM Post #423 |
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Heterotrophic Organism
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The Giga is used to hunting bigger prey so Rexy isn't a problem. T.Rex might be stronger but strength is nothing when you're bigger and meaner. Also more experienced with a bigger variety of prey(I think). While Rex usually hunted dinosaurs and other animals slightly or a lot smaller than him. T.Rex wouldn't fight the Giga, really, it would just run away from the fight, because it seems like the Rex was built for hunting, not fighting. Giga is, imo. |
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| Ausar | Jan 3 2016, 11:30 AM Post #424 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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*sigh If Giganotosaurus is bigger, how would it be weaker? That said, they're more or less the same size. Likewise, what exactly do you mean by "meaner"? More aggressive? More formidable? Maximum prey size is irrelevant, as a) both of these predators have weaponry that can easily kill each other and b) all predators (i.e. including Giganotosaurus) mostly hunt quarry smaller than themselves (not that I think Tyrannosaurus and the likes would really have been that bad at brontophagy). Prey diversity is irrelevant too, as they're not engaging in a contest of how many different things they can effectively hunt, they're fighting a similar-sized macropredator. If anything, wouldn't Tyrannosaurus have had a more diverse prey selection? Its probable prey included things like large ceratopsids, large hadrosaurids, ankylosaurs, possibly sauropods*, pachycephalosaurs, smaller ornithopods (i.e. Thescelosaurus), and ornithomimids. Other than sauropods and ornithopods, I can't really think of other things Giganotosaurus would have called prey. Tyrannosaurus was built for hunting and not fighting? Oh yeah, an animal with a robust body build, characteristics of the foot bones and other parts of the body that would have allowed for greater agility, powerful hindlimbs with toes tipped with 8-9 inch long pointed claws (not counting the horn coverings), a ridiculously powerful bull neck, a bone-shattering bite force that plausibly could have been over 100kN, and a solidly-constructed skull up to ~152cm long with jaws lined with strongly-rooted 10+cm long serrated spikes for teeth and a U-shaped premaxillary dental arcade with D-cross sectioned teeth that could scoop out 500 pounds of flesh a yard to a meter long and well over 30 centimeters deep and wide clearly isn't a good fighter. *From what I can tell, there's some uncertainty regarding whether or not Tyrannosaurus itself lived with Alamosaurus. Edited by Ausar, May 5 2016, 07:16 AM.
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| Spartan | Jan 3 2016, 12:08 PM Post #425 |
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Kleptoparasite
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Literally nothing in your post has any scientific ground. |
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| Jaws | Jan 3 2016, 01:48 PM Post #426 |
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Heterotrophic Organism
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Agreed. @Topic, I favor T.rex here, for reasons already stated. |
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| LordMax2222 | Feb 17 2016, 12:48 AM Post #427 |
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Autotrophic Organism
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Gigo wins 70/30 You guys overate trexes jaws if either of these get a hold on one anthers neck their dead. |
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| Spartan | Feb 17 2016, 01:04 AM Post #428 |
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Kleptoparasite
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Yes, but then why 70/30 and not 50/50? |
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| Snow Leopard | Feb 17 2016, 01:41 AM Post #429 |
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Herbivore
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I say 80/20. The Giganotosaurus was bigger, and used to hunting larger prey. A Tyrannosaurus would be easy for the Giganotosaurus to kill. Plus, the Giganotosaurus looked cooler anyway... Giganotosaurus ![]() Tyrannosaurus
Edited by Snow Leopard, Feb 17 2016, 01:42 AM.
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| Spartan | Feb 17 2016, 02:01 AM Post #430 |
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Kleptoparasite
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You really can't say which one was larger. They seem to be of the same size. 80/20 is baseless. |
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| Ausar | Feb 17 2016, 07:50 AM Post #431 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Wow, the idiocy in this last page is real... |
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| LordMax2222 | Feb 17 2016, 09:49 AM Post #432 |
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Autotrophic Organism
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The gigonatosaurus is faster and has a longer reach |
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| Spartan | Feb 17 2016, 09:59 AM Post #433 |
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Kleptoparasite
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What do you mean by longer reach? And how is it faster? The genus is also called Giganotosaurus, not Gigonatosaurus. |
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| Ausar | Feb 17 2016, 11:02 AM Post #434 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I think this comment just goes to show how people will just make things up in topics like this. First of all, not that speed really matters in a fight (unless the difference is extreme I guess), but if anything, Tyrannosaurus would have been faster, as it actually exhibits cursorial adaptations. As for the superior reach, two words: citation needed. |
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| Snow Leopard | Feb 17 2016, 11:13 AM Post #435 |
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Herbivore
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I can see a couple of fanboys in the two posts above me... |
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