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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,152 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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| Hatzegopteryx | Mar 4 2014, 09:44 AM Post #3436 |
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Unicellular Organism
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Actually, Vobby had posted about the gape being wide enough. I can't seem to find the post. |
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| The All-seeing Night | Mar 4 2014, 09:47 AM Post #3437 |
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You are without honor
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Thats good for the t.rex |
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| spinosaurus rex | Mar 4 2014, 09:51 AM Post #3438 |
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Carnivore
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tyrannosaurus was more robust when at parity in weights. he won't be that more robust then a larger creature. the jaws are powerful and your reasoning is alright and understandable. i actually think we went through every possability this fight could end up. i concluded that a spinosaurus would probrably win about 52 to 55% of the time at the most. it's obvious other people don't agree, but it's up to them to what they wan't to believe for the reason on tyrannosaurus victory. spinosaurus lived in an envirment full of predators. so i think it's reasonable to say spinosaurus will know how to defend itself. if spinosaurus MNSN turns out to be another taxon, it might of had a stronger bite force then we origonally predicted ( still not at the calabir of tyrannosaurus though) and not to mention the size advantage would be very effective to use in close quarter fighting these are just my reasoning Edited by spinosaurus rex, Mar 5 2014, 12:07 AM.
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| Animal man | Mar 4 2014, 10:27 AM Post #3439 |
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Herbivore
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I agree. no way I'm reading 230 pages of posts. This thread is going to die like the tiger vs lion thread. |
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| thesporerex | Mar 4 2014, 12:45 PM Post #3440 |
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Kleptoparasite
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As long as I am still breathing it will NEVA DAI!!! |
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| Canadianwildlife | Mar 5 2014, 03:39 AM Post #3441 |
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Apex Predator
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It shall never die! It must live on! Common, we gotta make it to 300. It would be a record.
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| ArachnidKid | Mar 9 2014, 05:57 PM Post #3442 |
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Heterotrophic Organism
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i guess you aren't familiar with exaggeration clearly none called him that it was just a remark on how he says one thing against the 'information' which is actually jus another members opinion, and suddenly you're vilified for that
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| TheMechaBaryonyx789 | Mar 11 2014, 01:17 AM Post #3443 |
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Herbivore
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http://dml.cmnh.org/2014Mar/msg00047.html According to Paul Sereno some new Spinosaurus material has been uncovered. Apparently it will change how the current reconstructions of Spinosaurus look and make it the largest known theropod. |
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| ArachnidKid | Mar 14 2014, 05:03 PM Post #3444 |
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Heterotrophic Organism
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300 pages of facts vs speculation is too much for a sane person to sit through!
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| Deleted User | Mar 16 2014, 11:50 AM Post #3445 |
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Deleted User
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Maximum size spinosaurus 85% Equal size t rex 68% |
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| Jinfengopteryx | Mar 16 2014, 05:53 PM Post #3446 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Don't tell me you guys are really that ignorant on theropods countless explanations why this argument is nonsense. Let me guess, T. rex size = fact, Spinosaurus size = speculation and therefore T. rex wins, right? |
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| ArachnidKid | Mar 18 2014, 05:32 AM Post #3447 |
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Heterotrophic Organism
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Not the case at all! If you subconsciously believe these to be the correct labels for viewpoints in this topic than by all means do so, i was referring to how some posters choose not from the merit these animals have but the aesthetics of it all.Rather choose which one looks more vicious and overlook the actual capacity in which they could conduct themselves in a battle |
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| Jinfengopteryx | Mar 18 2014, 11:57 PM Post #3448 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Who in this topic does so? I need evidence that enough posters do so, to call this thread filled with such posts. |
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| ArachnidKid | Mar 19 2014, 12:10 AM Post #3449 |
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Heterotrophic Organism
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For starters i'm not sifting through 230 pages for it but in the first page you can see member Apex mentioning how he believes spino wins just because of size and nothing else.That is creating your decision off of merely superficial bases to support what he thinks.That's one example there are most likely more but as i previously stated, 230 freakin pages!? no thanks ahaha
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| Jinfengopteryx | Mar 19 2014, 12:35 AM Post #3450 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I don't want you to look through all the pages, but according to your logic ("300 pages full of baseless speculation"), something like that should be found on every page which is obviously not the case (I have participated in this debate and I can tell you that although there was a lot stupidity, 90% of the comments were far smarter than that).
Edited by Jinfengopteryx, Mar 19 2014, 12:35 AM.
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It shall never die! It must live on! Common, we gotta make it to 300. It would be a record.

2:23 AM Jul 14