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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,240 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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| MysteryMeat | Feb 13 2013, 07:08 AM Post #2116 |
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Herbivore
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i'd rather put spino at 60% heavier, not 100%-200% heavier. 7-8--->11-12 Edited by MysteryMeat, Feb 13 2013, 07:09 AM.
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| Godzillasaurus | Feb 13 2013, 08:11 AM Post #2117 |
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Reptile King
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It would be an obvious mismatch in favor of spinosaurus at maximum weights. But I believe this fight is leaning more towards parity, still giving spinosaurus the upper hand weight-wise. |
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| blaze | Feb 13 2013, 09:00 AM Post #2118 |
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Carnivore
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Whilst high, the 9.5 tonne estimate is still within the boundaries of possibility, obtained by a fairly reliable method, the 21 tonnes for Spinosaurus by Therrien & Henderson (2007) is ridiculous, creating a formula to estimate the mass of all theropods by means of an equation for skull length derived from a sample whose only large theropods included short tailed tyrannosauroids is wrong in so many levels, it pretty much ignores every other aspect of their morphology. A graphical representation of the 21 tonne Spinosaurus from Therrien & Henderson (2007) will be an impossibly giant Tyrannosaurus with a 1.75m long skull and a cardboard sail on its back. I agree with MisteryMeat, there's no certainty that Spinosaurus was twice as big or more than any T. rex. Edited by blaze, Feb 13 2013, 09:01 AM.
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| dinosaur | Feb 13 2013, 09:58 AM Post #2119 |
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Heterotrophic Organism
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If u think u can do better than that puto, UR GONNA LOSE! |
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| Godzillasaurus | Feb 13 2013, 10:22 AM Post #2120 |
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Reptile King
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I never said spinosaurus grew two times the weight of tyrannosaurus. I simply stated that spinosaurus has a clear size and weight advantage. That is, of course, if you were referring to me, which it is a high possibility that you were not. |
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| blaze | Feb 13 2013, 10:41 AM Post #2121 |
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Carnivore
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Dal Sasso estimate uncertainty of 16-18m long is only a question of tail length, and as can be seen from his skeletal, to take a differently proportioned skeletal (like Hartman's) and scale it to those lengths will make it bigger than its supposed to be. In Hartman's, a ~14m Spinosaurus has a snout-sacrum length of ~7.35m, in Dal Sasso's, a ~17m one has a snout-sacrum length of ~8.15m. Let's remove the skull, which is ~1.75m in both so we end up with 5.6m and 6.4m respectively, if we scale Hartman's drawing to match Dal Sasso's the total body length sans skull will be 14m, now we add the 1.75m skull again and we end up with a total length of 15.75m, the difference is only because of the shorter tail compared to the 17m version of Dal Sasso. Without modifying the skeletal to have the skull proportions of Dal Sasso's, the maximum size you can scale Hartman's Spinosaurus to compare it to any other theropod is 16m, beyond that, not even the upper estimate of Dal Sasso's work will back you up because it only means a longer tail than the lower estimate, rather than bigger body overall. ![]() As shown, Spinosaurus head is too big (2m), T. rex might also have a head a little too big and the legs might be a bit oversized too but I didn't wanted to modify the skeletals, also remember that the leg proportions of Spinosaurus might change this summer, and for the body, it isn't set in stone either, it might be smaller. The fight is not really that one sided nor is this a match in which one contender is twice the weight of the other. @Godzillaman I wasn't referring to you, don't worry. Edited by blaze, Feb 13 2013, 10:51 AM.
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| Ausar | Feb 13 2013, 11:00 AM Post #2122 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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What the heck is that supposed to mean? Either way, it in no way proves you correct, again, that site broly was on did NOT concern dinosaurs so you have no reason to call brolyeuphyfusion an idiot, and you've yet to provide a reasonable explanation on why a T.rex would win to a larger Spinosaurus (pictures and drawings from DeviantArt aren't gonna help you). So unless you have any logical reasons for thinking a Tyrannosaurus can win to a Spinosaurus that's 4 meters longer, and several times heavier, don't expect a reply from me. Edited by Ausar, Feb 13 2013, 11:09 AM.
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| Ausar | Feb 13 2013, 11:03 AM Post #2123 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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In a battle where the dinosaurs are the same size the picture shows, who do you think would win? IMO, it would probably be 50/50. Edited by Ausar, Feb 13 2013, 11:04 AM.
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| blaze | Feb 13 2013, 11:08 AM Post #2124 |
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Carnivore
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I more or less agree with that but I'm not really giving a complete opinion until I've read the summer study. |
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| Godzillasaurus | Feb 13 2013, 11:16 AM Post #2125 |
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Reptile King
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I don't know... Given the size advantage of spinosaurus, I don't see how it would have any disadvantages other than overall build. I still think using those sizes would give spinosaurus the victory. |
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| dinosaur | Feb 13 2013, 11:29 AM Post #2126 |
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Heterotrophic Organism
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That's right back off! Nobody talks back to me gets away with it! Besides, if I show u guys real data, u and the others will say something like, its just a video Or, that is delusional. I just can't seem to explain with data, other than images |
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| Ausar | Feb 13 2013, 11:39 AM Post #2127 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Uhhhh... I just did. No, if you show us real data that can be supported, and if you can hold your own against criticism to it, you would be taken seriously. And images with things such as size comparisons are fine. Edited by Ausar, Mar 11 2013, 10:35 AM.
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| Godzillasaurus | Feb 13 2013, 11:41 AM Post #2128 |
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Reptile King
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Why doesn't Taipan just ban this idiot!? I hated that troll that kept posting inappropriate pictures all over the forum a couple days ago, but I would take him over this guy any day! |
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| Ausar | Feb 13 2013, 11:46 AM Post #2129 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Deleted.
Edited by Ausar, Feb 13 2013, 11:54 AM.
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| SpinoInWonderland | Feb 13 2013, 11:50 AM Post #2130 |
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The madness has come back...
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The legs are from a different specimen and should not mixed up with IPHG 1912 and/or MSNM V4047...different specimens have different sizes... |
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