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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,266 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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| Maelstrom | Jan 27 2013, 07:58 PM Post #1726 |
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Autotrophic Organism
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Yes I know, I originally posted this image before, I just reposted it on that quote to show someone. I said if it was proportioned the same, I didn't say it was the average; in the original post I said it was liberal and in this post I didn't say anything about average. Itt is a thumb claw and the others would be smaller - I said this too. I also posted that the claws would be a deciding factor if Spino could reach T.rex's head. The original post was before Jinfeng showed that theropod had limited arm motion. I know wikipedia is unreliable sometimes but it said 'this trait is not universal, spinosaurids had well developed arms' and if the higher estimates (I'm not saying they are or they aren't) are true for Spinosaurus then it would be able to reach T.rex's head without much arm motion anyway. Edited by Maelstrom, Jan 27 2013, 08:09 PM.
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| theropod | Jan 27 2013, 08:05 PM Post #1727 |
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palaeontology, open source and survival enthusiast
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no lie, you would know that nothing I or others have extrapolated in this regard is in conflict with what Sakamoto wrote if you wheren't so fast in claiming I was wrong.
I'm well aware of that, even tough i tought differently some time ago, it seems like carcharodontosaurs had a stronger bite than spinosaurus
I have posted proof for Carcharodontosaurus bite force to have been far stronger than that, based on more recent, more precise figures, so you might have to reconsider your and greys information and look whether it was simply guessed
Maybe I should do it your way and write everything fragillimus does is far better than what you do... ![]()
you will never learn it, will you? that a scientist deduces it does not make it a fact, it makes it a deduction. I can too make a deduction, and that's even a fact: that based on Irritator and Suchomimus the dentary would have to be that long. I too have references for it: 1. Ernst Stromer: Wirbeltier-Reste der Baharije-Stufe (unterstes Cenoman) Das Original des Theropoden Spinosaurus aegyptiacus, nov. gen., nov. spec. 2. Smith et al. : NEW INFORMATION REGARDING THE HOLOTYPE OF SPINOSAURUS AEGYPTIACUS STROMER, 1915 3.Dal Sasso et al. : NEW INFORMATION ON THE SKULL OF THE ENIGMATIC THEROPOD SPINOSAURUS, WITH REMARKS ON ITS SIZE AND AFFINITIES 4. Sues et al. : Irritator challengeri, a Spinosaurid (Dinosauria: Theropoda) from the Lower Cretaceous of Brazil 5. sereno et al. : A Long-Snouted Predatory Dinosaur from Africa and the Evolution of Spinosaurids Here you have a nice list of papers to read and check the accuracy of my reconstruction with, should you then notice inaccuracies, please tell me. So the next time, check things yourself before claiming it to be inaccurate, and differentiate between opinions and facts. The dentary is the shape of BSP 1912 VIII 19 scaled to match the respective lenght of Irritator or Suchomimus, unlike you, I do not just make things up. Cau might think differently, but based on named animals it is not likely that if the holotype had a 75cm dentary MSNM V4047 would be only 20% bigger, rather 45%. With a 95cm dentary it would be ~16% If these figures do not fit your personal and andrea Cau's view of this animals proportions, you should probably measure his scale and look why it is different instead of claiming me to produce inaccurate work. Edited by theropod, Jan 27 2013, 08:06 PM.
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| Jinfengopteryx | Jan 27 2013, 09:27 PM Post #1728 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I think it earlier too had much more scenes, but for some reason, they deleted a lot of them, to press it in 4 episodes. Also, it was originally called, "Regim of the dinosaurs". You can find it in this book. |
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| Godzillasaurus | Jan 28 2013, 12:03 AM Post #1729 |
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Reptile King
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I never said I took them seriously. I simply stated that spinosaurus wasn't as weak as previously thought by many people. WE estimated its bite at 2 to 3 tons, but that doesn't really make it an invalid estimation. |
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| Kurtz | Jan 28 2013, 12:21 AM Post #1730 |
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Kleptoparasite
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what kind of damage could have produced the spino bite on t rex, this is the question |
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| theropod | Jan 28 2013, 12:22 AM Post #1731 |
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palaeontology, open source and survival enthusiast
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Grey thinks everything not published except for some very special things concerning tooth function and C. megalodon is worthless, so yes, to him it does make it invalid, especially as one statement by sakamoto was interpreted by grey to be in conflict with this... |
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| SpinoInWonderland | Jan 28 2013, 12:33 AM Post #1732 |
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The madness has come back...
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I just noticed that this thread now has more posts than Lion vs Tiger... |
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| Kurtz | Jan 28 2013, 12:42 AM Post #1733 |
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Kleptoparasite
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Do you think is a good thing, i do not |
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| Grey | Jan 28 2013, 01:36 AM Post #1734 |
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Kleptoparasite
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Check my history of contributions to the forum from discussions with scientists, unrelated to megalodon. Then shut your trap. Peer reviewed, and discussions are the most prevailing sources to me. |
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| theropod | Jan 28 2013, 01:37 AM Post #1735 |
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palaeontology, open source and survival enthusiast
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If they where, you would be open to logical arguments, even if something has not before been stated by a scientist. |
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| Grey | Jan 28 2013, 01:48 AM Post #1736 |
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Kleptoparasite
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Logical argument has no scientifical weight facing a peer reviewed or a lengthy discussion with one field authority. |
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| theropod | Jan 28 2013, 02:00 AM Post #1737 |
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palaeontology, open source and survival enthusiast
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I knew you would say that "logical argument has no weight" authority>>>>>>logic just about every scientist that i know would certainly say that's wrong, but hey, you think otherwise! |
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| Superiron21 | Jan 28 2013, 02:09 AM Post #1738 |
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Autotrophic Organism
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Thanks for your opinion I really appreciate an IMPARTIAL point of view.... Edited by Superiron21, Jan 28 2013, 02:10 AM.
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| Maelstrom | Jan 28 2013, 02:12 AM Post #1739 |
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Autotrophic Organism
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This thread beat 'Lion vs Tiger'. |
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| Grey | Jan 28 2013, 02:12 AM Post #1740 |
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Kleptoparasite
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Theropod, I would favor any paleontologist author over you. I don't give a coin of your works, can you understand ?
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