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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,321 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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| Verdugo | Oct 31 2012, 07:48 PM Post #901 |
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Large Carnivores Enthusiast
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It depends, Sue would look like the first one, while Carnegie and Stan would look like the second one
The laser imaging has already been applied to Allosaurus, and it doesn't look any thing like the first pic, the second one is good though
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| Fragillimus335 | Nov 1 2012, 01:41 AM Post #902 |
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Omnivore
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Spinosaurus would only suffer pain from a broken crest. The spinal cord is in the neural canal, not in the spines. You could surgically remove the entire sail from a Spinosaurus, and it would be just fine. Edited by Fragillimus335, Nov 1 2012, 01:42 AM.
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| SpinoInWonderland | Nov 1 2012, 02:28 AM Post #903 |
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The madness has come back...
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Dude, that wasn't a serious scenario... |
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| Ausar | Nov 1 2012, 06:43 AM Post #904 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I'm just going to put in what I think. Don't any of you dare to call me a fanboy. Against a minimum sized Spinosaurus, T.rex wins 55% of the time. Against a maximum sized Spinosaurus, Spinosaurus wins probably 70 or 80% of the time. |
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| Jinfengopteryx | Nov 1 2012, 06:47 AM Post #905 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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What do you mean with minimum sized? 16m or 14m? Or 12,5? |
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| Ausar | Nov 1 2012, 06:53 AM Post #906 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I don't know. What do you think? |
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| Jinfengopteryx | Nov 1 2012, 06:55 AM Post #907 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I believe in 16m or maybe 14m as minimum. A 16m Spinosaurus should be enough to win, if we take rather conservative sizes for Tyranosaurus (12,3-12,5m). You can look it up here. (the here is clickable) |
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| Ausar | Nov 1 2012, 07:07 AM Post #908 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Interesting. |
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| Ausar | Nov 1 2012, 07:25 AM Post #909 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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@jinfengopteryx But there was something about the Tyrannosaurus profile on that link that didn't seem right. Tyrannosaurus first appeared 68 million years ago, not 66.8. |
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| Carcharadon | Nov 1 2012, 07:47 AM Post #910 |
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Shark Toothed Reptile
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Nevermind, my vote's changed to spino, but i doubt t.rex would go down easy |
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| theropod | Nov 1 2012, 07:30 PM Post #911 |
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palaeontology, open source and survival enthusiast
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This has nothing to do with the laser imaging technology, it is used for scanning the skeletons. How much tissue you add is variable, and I showed what hapopens to allosaurus if you make it bulkier to a similar extend as T. rex was made bulkier. Of course this allosaurus is much better than the bulky one, as a normal T. rex is also better than that fatass-reconstruction. Also, a 1,5t big all is not particularly slender compared to some other estimates, it gives you a 5t 12m epanterias and a 6,4t saurophaganax (at 8m and the best estimate, not the one with a bit more bulk). you simply have to stop considering T. rex as the only animal that a more liberal weight estimate metod can be applied to. if you use this allosaurus with a bulked up estimate it could be jsut as astronomic as sue. using 7,5-8m big al (somehow it seems very problematic for any paper to give a lenght figure and those on the web vary) at one of these:
It also gets much more massive. So just don´t compare the Sue from the laser imaging metod to other estimates for other theropods and when being lberal aout it, be liberal about others as well, even tough I will use lower estimates for all of them. |
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| DinosaurMichael | Nov 6 2012, 10:02 PM Post #912 |
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Apex Predator
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That's a mismatch. We have this though. People are favoring one T-Rex more than Spinosaurus. |
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| theropod | Nov 6 2012, 10:11 PM Post #913 |
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palaeontology, open source and survival enthusiast
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That does not mean it would win. 3 T. rexes are two much but 2 could still be a good fight at the upper range of spinos size. people are favouring T. rex because they don´t know about the size and think because of a stronger bite it automatically wins. |
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| DinosaurMichael | Nov 6 2012, 10:12 PM Post #914 |
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Apex Predator
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Well we already have this. So no need to make it. |
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| Jinfengopteryx | Nov 7 2012, 04:16 AM Post #915 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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