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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,243 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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| Godzillasaurus | Feb 11 2013, 12:55 AM Post #2071 |
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Reptile King
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I wasn't really supporting tyrannosaurus, I was just providing evidence that crocodiles can do so. But yes, that crocodile was much larger than the zebra whereas the spinosaurus had a substantial weight and size advantage over tyrannosaurus. |
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| dinosaur | Feb 11 2013, 06:29 AM Post #2072 |
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Heterotrophic Organism
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Nate, brolyeuphyfusion doesn't understand that Rex is also the more skilled fighter. She probably hates t.Rex since I fell like he always underrates the king |
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| TheROC | Feb 11 2013, 06:30 AM Post #2073 |
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Herbivore
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....'skill'? I'm sorry, what? Stop anthropomorphizing animals. Edited by TheROC, Feb 11 2013, 06:31 AM.
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| blaze | Feb 11 2013, 06:40 AM Post #2074 |
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Carnivore
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This summer? really? I'm so happy :'( Edited by blaze, Feb 11 2013, 06:40 AM.
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| dinosaur | Feb 11 2013, 06:56 AM Post #2075 |
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Heterotrophic Organism
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Tyrannosaurus happens to kill some sauropods and armored prey. Spino only kills fish and smaller and easy targets. T.Rex can make spino roll over. Spino, if it rolls over, it breaks its back and dies |
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| Godzillasaurus | Feb 11 2013, 07:07 AM Post #2076 |
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Reptile King
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Really dude? Tyrannosaurus wasn't even designed for taking down sauropods. That feature goes to allosaurids. And spinosaurus wasn't 100% piscivore, it hunted animals larger than fish. |
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| dinosaur | Feb 11 2013, 07:44 AM Post #2077 |
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Heterotrophic Organism
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T.rex happened to kill alamosaurus snap, just like that. |
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| MightyMaus | Feb 11 2013, 08:45 AM Post #2078 |
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Autotrophic Organism
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That is 100% false. Spinosaurus could break even single spine and keep fighting with only minor injuries. Also, if anyone is getting knocked down it's the tiny little Tyrannosaurus. Stop spewing false information. |
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| Godzillasaurus | Feb 11 2013, 09:03 AM Post #2079 |
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Reptile King
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But I wouldn't think of tyrannosaurus as being weak either. Tyrannosaurus was more heavily built than spinosaurus, even when spinosaurus had a huge size advantage. |
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| theropod | Feb 11 2013, 09:06 AM Post #2080 |
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palaeontology, open source and survival enthusiast
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grey, sorry, I must have missed your post. As you know, I'm updating my reconstructions all the time, you should still be able to see that in my gallery, even tough I delete most obsolete versions. I have tought about making an alternate dorsal view version more than once, but always with the resultf of all spinosaurs that I could possibly base it on not having broader skulls than this. Don't worry, sooner or later I will do another one, however it will not be an update as both are unconfirmed and speculative. A thing I want to point out is that in rayfield's 2d fea the much deeper skull based on irritator didn't seem to be stronger, looks can be deceiving, this might too apply to skull width. Making the posterior cranium broader than it is in my drawing would furthermore result in a steep angled, step like tapering from the back of the skull to the preserved part, similar to T. rex. Possible, but not necessarily thes most likely. |
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| dinosaur | Feb 11 2013, 12:12 PM Post #2081 |
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Heterotrophic Organism
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Who needs big hands, when u got head and jaw power and super skill?!! |
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| SpinoInWonderland | Feb 11 2013, 12:24 PM Post #2082 |
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The madness has come back...
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Ignore him, we tried to reason with him a load of times, but failed, he's far too biased... |
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| Kunfuzzled | Feb 11 2013, 12:39 PM Post #2083 |
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Autotrophic Organism
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Actually if it rolled over with sufficient force (eg. on it's own weight), the long neural spines are more than long enough that it would act as a long lever arm providing enough torque ( t = F x r , torque being resultant of force aka weight multiplied by perpendicular radial distance aka length of the neural spines ) in-order to rotate or dislodge the actual back vertebrae and twisting/severing of the spinal cord. Of course the result depends on the structure of the spine; a frail skin sail would simply snap preventing an forces being experienced at the vertebrae, a hump would prevent and torque at all but a muscular ridge (proposed by many members) would most likely reinforce the neural spines with enough muscle that they would not snap but undergo a process similar to this (excuse the crude "Paint" illustration.) ![]() And for those that doubtful it's really just simple high school physics and (a tad) of biology. |
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| SpinoInWonderland | Feb 11 2013, 12:43 PM Post #2084 |
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The madness has come back...
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Yeah, but the Tyrannosaurus fans are stating that if it snaps it's neural spines it would die instantly... |
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| Kunfuzzled | Feb 11 2013, 12:47 PM Post #2085 |
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Autotrophic Organism
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Yeah that's just silly, if the spines snapped halfway without interfering with the position of the vertebral column nothing would result. My idea assumes that the spines are surrounding muscle are strong enough that the neural spines would remain attached to the vertebrae under excessive force (which may not be true.) |
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