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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,228 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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| DarkGricer | Mar 21 2013, 04:15 AM Post #2296 |
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Omnivore
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"Look at this skull!!! Really wimpy and means Nothing! It's all dumb stuff! A host, a con!!! A FRONT!!!" Oh, I took a look, alright. I suggest you do the same rather than speak nonsense. Isn't it funny how he gives us an "argument" of why Spinosaurus would lose, then posts a picture that's supposed to back up his claim, but it actualy disproves his claim? |
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| Ausar | Mar 21 2013, 04:39 AM Post #2297 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I don't know about you, but I don't see what's so bad about the skull of Spinosaurus. |
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| Vivyx | Mar 21 2013, 05:21 AM Post #2298 |
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Felines, sharks, birds, arthropods
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Yeah. he's a "frollboy" (fanboy and troll together). |
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| Vivyx | Mar 21 2013, 05:25 AM Post #2299 |
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Felines, sharks, birds, arthropods
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I see nothing wrong with that skull, like Dinopithecus said. But spinosaurus on the other hand, is bigger and can knock the tyrannosaurus over. |
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| Bandog | Mar 21 2013, 05:38 AM Post #2300 |
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Everything else is just a dog.
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Minimal area for muscle attachment, teeth ill designed to kill large prey, comparably gracile and flimsy structure? The skull of spinosaurus is not adapted to take on anything close to the size of trex. If spinosaurus is too win it should keep its skull away from the head of Rex because I seriously doubt its skull could withstand trex' bite. |
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| bone crusher | Mar 21 2013, 09:37 PM Post #2301 |
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Heterotrophic Organism
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The spino skull maybe adequate for what it is but compared to a T Rex skull it's almost a bad joke. |
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| Shaochilong | Mar 22 2013, 12:25 AM Post #2302 |
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Herbivore
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No modern felid has serrated teeth, and they are perfectly adapted for killing prey bigger than themselves. What is more, a few including lynx kill with bites to the neck. Its skull is very crocodile-like, and it isn't really how broad the jaws are that determines bite force so much as it is proportionate length. Spinosaurus has a stronger bite force than any carcharodontosaurid, and those conical teeth are deeply rooted and well-adapted for stabbing and puncturing flesh. Tyrannosaurus undeniably has a far stronger bite, but to call Spinosaurus' skull a "bad joke" in comparrison is quite fanboyish. |
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| dinosaur | Mar 22 2013, 04:10 AM Post #2303 |
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Heterotrophic Organism
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I highly doubt that. Tyrannosaurus will knock spino first, causing spino to roll over, breaking its back and die. Tyrannosaurus is the more skilled and experienced fighter. |
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| Shaochilong | Mar 22 2013, 05:46 AM Post #2304 |
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Herbivore
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Spinosaurus will not abruptly die if the neural spines are broken; that will cause only pain. The cause of death if it fell would more likely be broken ribs, punctured internal organs etc., but the same damage would occur in Tyrannosaurus or indeed any animal of that size. There is simply no way of knowing whether Tyrannosaurus was a more experienced fighter, but I think that most if not all theropods would have fought among themselves, and, in Spinosaurus' case, probably Carcharodontosaurus as well. |
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| Carcharadon | Mar 22 2013, 05:46 AM Post #2305 |
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Shark Toothed Reptile
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Now thats just hipposhit. |
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| dinosaur | Mar 22 2013, 06:06 AM Post #2306 |
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Heterotrophic Organism
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Can't u say anything else but shit? |
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| Vivyx | Mar 22 2013, 06:18 AM Post #2307 |
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Felines, sharks, birds, arthropods
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Um, excuse me. But the spino is twice the rex's size and is more likely to knock the tyrannosaurus over, then step on the rex. |
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| Vivyx | Mar 22 2013, 06:19 AM Post #2308 |
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Felines, sharks, birds, arthropods
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Yes. Edited by Vivyx, Apr 11 2013, 08:41 PM.
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| Bandog | Mar 22 2013, 07:12 AM Post #2309 |
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Everything else is just a dog.
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Hence why I didn't call it a bad joke. It's teeth aren't even comparable to cats. The short, broad skull of a cat aids its enlarged canine teeth to dispatch prey. The long, thin snout of spinosaurus aids its mobility and the uniformly sized teeth (compared to cats) are suited to catch swift moving prey. As far as inter-theropod fights are concerned, its all but useless. |
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| Jinfengopteryx | Mar 22 2013, 07:13 AM Post #2310 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Verdugo has shown a post by Sakamato on ask a biologist, where he said the opposite. |
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