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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,158 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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| Ceratodromeus | Mar 1 2014, 10:51 AM Post #3346 |
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Aspiring herpetologist
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this can be said for Spinosaurus too.... |
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| Hatzegopteryx | Mar 1 2014, 10:51 AM Post #3347 |
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Unicellular Organism
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More baseless speculation, I see. You totally lost the few creditibility you had with the genders, we have no evidence of sexual dimorphism on the species what so ever. And you are also speculating a lot of its mass gain throughout its life, show me at least 7 different statements that were proven that support your case or else you're wrong. |
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| Hatzegopteryx | Mar 1 2014, 10:52 AM Post #3348 |
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Unicellular Organism
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Except we aren't making a bunch of baseless speculations around it like you are |
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| spinosaurus rex | Mar 1 2014, 10:52 AM Post #3349 |
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Carnivore
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that thread is 3 pages of pure debate on how large c.rex and f.rex was. it is evidence that i can concider reliable. saying it isn't without eny good reasoning is a bit biased. you delivered no evidence on them being 14 meters Edited by spinosaurus rex, Mar 1 2014, 10:55 AM.
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| Hatzegopteryx | Mar 1 2014, 10:53 AM Post #3350 |
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Unicellular Organism
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So? It doesn't strenghten your argument, you tried getting him in hipocrisy but he isn't making a load of baseless speculations one after another about a fragmentary specimen. Edited by Hatzegopteryx, Mar 1 2014, 10:54 AM.
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| Ausar | Mar 1 2014, 10:54 AM Post #3351 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Edited: nvm.
Edited by Ausar, Mar 1 2014, 10:56 AM.
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| Hatzegopteryx | Mar 1 2014, 10:56 AM Post #3352 |
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Unicellular Organism
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You guys are advertising another forum, aren't those things avoided here? |
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| Ausar | Mar 1 2014, 10:57 AM Post #3353 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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^I try to, but he said he was from there too. I got a bit curious. I suggest we edit our posts.
Edited by Ausar, Mar 1 2014, 11:00 AM.
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| Hatzegopteryx | Mar 1 2014, 10:59 AM Post #3354 |
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Unicellular Organism
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Yeah, you should do that, just edit the names out of the posts I guess that would be fine. |
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| Ceratodromeus | Mar 1 2014, 11:00 AM Post #3355 |
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Aspiring herpetologist
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you guys....kill me...7? can you name 7 for your claims? "if not your wrong", bud. while not 7. i can provide some.. Dinosaur growth basicshttp://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0081917 Tyrannosaurus growthhttp://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0026037 Here's a Tyrannosaurus growth chart.. ![]() |
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| Ceratodromeus | Mar 1 2014, 11:02 AM Post #3356 |
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Aspiring herpetologist
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i will PM you or something.. |
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| Hatzegopteryx | Mar 1 2014, 11:04 AM Post #3357 |
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Unicellular Organism
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I am not the one making a bunch of baseless assumptions about colour changing, sexual dimorphism and many others. Back your claims with evidence, what I am doing here is simply debunking those baseless speculations |
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| Ausar | Mar 1 2014, 11:04 AM Post #3358 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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PMs are disabled. |
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| Ceratodromeus | Mar 1 2014, 11:07 AM Post #3359 |
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Aspiring herpetologist
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i didn't say any where i thought spinosaurus could change its sail color? XD come on man....i was simply showing you guys an interpretation from another writer, no where did i claim it was proof of anything. As for the sexual dimorphism in tyrannosaurs, that was my theory, which i don't even whole heardtedly believe any more. Got me there. What "many others" did i claim? tell me.. i'm dying to know. |
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| spinosaurus rex | Mar 1 2014, 11:09 AM Post #3360 |
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Carnivore
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those post don't even suggest anything about the fragmentary 14 meter individuales. it shown they had a massive growth rate, but provides nothing for the size estimates of a 14 meter tyrannosaur Edited by spinosaurus rex, Mar 1 2014, 11:10 AM.
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or some where around that?


2:23 AM Jul 14