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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,264 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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| theropod | Jan 28 2013, 03:23 AM Post #1756 |
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palaeontology, open source and survival enthusiast
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I think none of the non-fanboys/non-haters around would suggest that, in fact it is out of question that spinosaurus was dangerous. |
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| Superiron21 | Jan 28 2013, 03:26 AM Post #1757 |
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Autotrophic Organism
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I totally respect your point of view... Althought I'd think T-rex can win against any Spino.... |
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| Maelstrom | Jan 28 2013, 03:28 AM Post #1758 |
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Autotrophic Organism
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Ok then, I respect your opinion, lets agree to disagree. |
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| Carnosaur Rex | Jan 28 2013, 03:47 AM Post #1759 |
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Unicellular Organism
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I know this is off-topic but can someone tell me why I can't send Private Message? You do not have permission to send a message. Error Code: 18039:6046730 |
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| Maelstrom | Jan 28 2013, 04:02 AM Post #1760 |
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Autotrophic Organism
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I got that error when I tried to pm without logging in. Were you logged in? Edited by Maelstrom, Jan 28 2013, 04:05 AM.
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| blaze | Jan 28 2013, 04:30 AM Post #1761 |
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Carnivore
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I agree with MysteryMeat about Planet Dinosaur and I also share the sentiment that it should of had Dinosaur Revolution graphics, which I think is the best looking dinosaur documentary right now, but that's it, the stories mmm, it is not as anthropomorphic as say, Lion King or Dinosaurs but they don't really act like animals, and sometimes they're too dumb to live (Guanlong segment), as a documentary it doesn't work, but as a "dinosaur movie" it's good, specially because of the quality of the CGI. |
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| Carnosaur Rex | Jan 28 2013, 04:35 AM Post #1762 |
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Unicellular Organism
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yeah I´m logged in, then what's the prob? |
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| theropod | Jan 28 2013, 04:47 AM Post #1763 |
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palaeontology, open source and survival enthusiast
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It was disabled, I cannot send them either and I think nobody here can. |
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| Jinfengopteryx | Jan 28 2013, 04:59 AM Post #1764 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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You have to use the email function (above the PM buttom). |
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| Carnosaur Rex | Jan 28 2013, 05:04 AM Post #1765 |
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Unicellular Organism
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@theropod and Jinfengopteryx thanks for your answer, but they're not going to enable again? |
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| Jinfengopteryx | Jan 28 2013, 05:05 AM Post #1766 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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They don't do it, because it was abused for animal cruality. |
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| MysteryMeat | Jan 28 2013, 05:12 AM Post #1767 |
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Herbivore
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If that life size model in Italy is to represent the latest unpublished studies, like you suggested, they seem to think Spinosaurus is about 15.8 meters long with a long tail and very short hind legs. Then 1.94-2meter skull is not reconstructed by any scientist but by members on this forum, probably based on Suchomimus, which is not considered to be the closest relative of Spinosaurus. I do not agree with that reconstruction because Spinosaurus has super elongated premaxilla and maxilla that is in very different shape than Suchomimus. Irritator and that composite spino skull in private collect also prove that the back have of Spino's skull is shorter and deeper than Suchomimus. |
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| Superiron21 | Jan 28 2013, 05:12 AM Post #1768 |
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Autotrophic Organism
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That's true..... Edited by Superiron21, Jan 28 2013, 05:14 AM.
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| Carnosaur Rex | Jan 28 2013, 05:17 AM Post #1769 |
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Unicellular Organism
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Well I see that, thanks for answering. |
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| theropod | Jan 28 2013, 05:50 AM Post #1770 |
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palaeontology, open source and survival enthusiast
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There is no dramatic difference between the posterior crania in Suchomimus and Irritator actually, and I doubt fragillimus´ reconstruction bases on Suchomimus. Basing on suchomimus it gets to ~1,8m, it is not that certain for Irritator as it´s snout is missing but it doesn´t really make a huge difference anyway, Fragillimus simply shows a longer posterior part that he based on a picture of a private spinosaurus skull.
Edited by theropod, Jan 28 2013, 05:54 AM.
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