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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,241 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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| dinosaur | Feb 12 2013, 08:41 AM Post #2101 |
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Heterotrophic Organism
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SPINO AIN'T GOT NOTHING ON ME!!!! |
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| TheROC | Feb 12 2013, 10:18 AM Post #2102 |
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Herbivore
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Dear God. This has to be the worst thread on the forum. |
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| Black Ice | Feb 12 2013, 10:28 AM Post #2103 |
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Drom King
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Broly went in on that link gtfo
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| Ausar | Feb 12 2013, 10:45 AM Post #2104 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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They weren't even arguing about dinosaurs on that site, they were arguing about Dragon Ball you idiot. So what's your point? Dinosaurs =/= Dragon Ball. Edited by Ausar, Feb 12 2013, 10:45 AM.
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| dinosaur | Feb 12 2013, 11:34 AM Post #2105 |
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Heterotrophic Organism
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Both of them pendejo! |
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| mega t.rex the magnificent | Feb 12 2013, 11:12 PM Post #2106 |
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Autotrophic Organism
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That tyrannosaurus rex, has turned him (dinosaur) into a complete jerk! |
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| MightyMaus | Feb 13 2013, 03:25 AM Post #2107 |
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Autotrophic Organism
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HERE IS WHAT THIS BOILS DOWN TO. IF YOU BELIEVE SPINOSAURUS WAS 16-18 METERS IT WINS WITHOUT A DOUBT, IF YOU BELIEVE IT IS < 14 METERS IT LOSES. There is simply no way a theropod is going to out muscle another predator 2 to 3 times its own weight people...face it. If we take away the godlike status of tyrannosaurus anyone can see this is a horrible mismatch at max, average and minimum weights. 20-9.5 14-6.5 9-4 |
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| Jinfengopteryx | Feb 13 2013, 03:30 AM Post #2108 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I think at 16m, it may be somewhat of a struggle for Spinosaurus, but it still should be able to win. |
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| Spinodontosaurus | Feb 13 2013, 04:00 AM Post #2109 |
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Herbivore
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Well it isn't that simple. The neck and torso lengths in Spinosaurus whilst unknown, are somewhat constrained to a small margin or variation by the bones we do possess. The difference between an accurately proportioned 14 meter and 17 meter Spinosaurus (MSNM V4047) is almost entirely down to tail length. A Baryonyx-like tail (the length of which is broadly similar to the majority of similarly sized theropods) results in a 17 meter individual. A Cristatusaurus/Suchomimus style tail results in a Spino just shy of 15 meters. You can also use Hartman's short-tailed Spino and get 14 meters. Leg length is kinda similar to this actually, in that Baryonyx legs give it a hip height of just over 4 meters (would be greater in life if the body extended up the neural spines at all), Cristatusaurus gives ~3.5 meters. Neither is wrong, and neither is right. |
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| Jinfengopteryx | Feb 13 2013, 04:08 AM Post #2110 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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^I know that it is hard, but I used a hypothethical 16m Spinosaurus, because that is what I believe in. Holtz for example backed it up in his Genus list, also, I get this when scaling from an 11m Suchomimus, with a 1,19m skull, to a 1,75m skull. |
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| theropod | Feb 13 2013, 04:26 AM Post #2111 |
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palaeontology, open source and survival enthusiast
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based on suchomimus, it gets to more than 16m: 11m/1,19m*S let S be 1,75m =16,2m let S be 1,8m =16,6m if it was shorter than this, it would have a particularly short tail, hence still about the volume and weight corresponding to the sizes above. Edited by theropod, Feb 13 2013, 04:26 AM.
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| Jinfengopteryx | Feb 13 2013, 04:34 AM Post #2112 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I know, I wrote the 16,2m number a few pages back yet, but I took a rough number. |
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| theropod | Feb 13 2013, 04:47 AM Post #2113 |
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palaeontology, open source and survival enthusiast
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I was rather replying to spinodontosaurus, he wrote suchomimus would only yield 15m... |
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| Ausar | Feb 13 2013, 06:05 AM Post #2114 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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What do you mean "both of them"? If you were talking about what they were arguing about, then no, they were only arguing about Dragon Ball, the only time dinosaurs were mentioned was when broly said he knows more about dinosaurs than Dragon Ball, if you actually read it. Stop making crap up pendejo. Edited by Ausar, Feb 13 2013, 06:31 AM.
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| Ausar | Feb 13 2013, 06:35 AM Post #2115 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Agreed, I honestly can't see what T.rex would do to something THAT much bigger than it. |
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gtfo


2:23 AM Jul 14