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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,230 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 13 2013, 03:32 AM Post #2266 |
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Omnivore
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![]() Dark green Spinosaurus: 18 meters Light green Spinosaurus: 14 meters T.rex: 12 meters Spino is actually larger compared to T.rex than I expected. So yeah, I'm gonna have to give Spino a 65% chance of victory here. |
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| Spinodontosaurus | Mar 13 2013, 03:50 AM Post #2267 |
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Herbivore
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In absolute terms, no. At least not based on the best reconstruction out there... which is Scott Hartman's Nothronychus.
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| Big G | Mar 13 2013, 05:00 AM Post #2268 |
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Herbivore
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I saw that the T-Rex was the strongest on YouTube, a video in which he said the 4 strongest carnivorous dinosaurs. However, even if it is not the strongest, I think I will choose, however, the T-Rex. |
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| DarkGricer | Mar 13 2013, 05:33 AM Post #2269 |
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Omnivore
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You use a Youtube video as a source? I once watched a video that said Megalodon could reach 100 meters. Doesn't mean it's true. |
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| theropod | Mar 13 2013, 05:44 AM Post #2270 |
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palaeontology, open source and survival enthusiast
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well, I forgot about therizinosaurus, it's probably far bulkier than any of the carnivorous theropods compared to lenght... In absolute terms is useless when it's about the body shape, otherwise spino wins the bulkiness contest hands down. Edited by theropod, Mar 13 2013, 05:45 AM.
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| Ausar | Mar 13 2013, 05:49 AM Post #2271 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I've been ignoring him for 2 days now. |
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| Black Ice | Mar 13 2013, 05:58 AM Post #2272 |
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Drom King
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I watched one that said penguins weren't real
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| dinosaur | Mar 13 2013, 08:56 AM Post #2273 |
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Heterotrophic Organism
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Even he knows who's powerful and skilled |
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| Ausar | Mar 13 2013, 09:02 AM Post #2274 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I'd give a 16m Spino a 70% of winning. I'd give a 14m Spino a 45% of winning. |
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| SpinoInWonderland | Mar 13 2013, 06:26 PM Post #2275 |
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The madness has come back...
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When I meant bulky, I meant more robust, not the one with more mass... |
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| Spinodontosaurus | Mar 13 2013, 07:33 PM Post #2276 |
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Herbivore
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^Which is exactly what that chart is meant to represent. Bulk. It doesn't display the relative widths, but like I said; "based on ... Scott Hartman's Nothronychus", it isn't bulkier. Relative to it's length, then yeah it is. But that is more down to it having an extremely short tail than actually being hugely robust. EDIT: This is somewhat offtopic...
I would actually give them roughly the same chance, whatever that may be. Currently, specimen MSNM V4047 could measure 14 meters or 17 meters, or anything in between, through only variation in tail length. The longer tailed one would have a bit more mass (couple of tonnes?) to throw around, whilst the shorter tail one would suffer from less rotational inertia. But aside from that there would be very little difference between them. Edited by Spinodontosaurus, Mar 13 2013, 07:34 PM.
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| theropod | Mar 13 2013, 09:21 PM Post #2277 |
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palaeontology, open source and survival enthusiast
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^you mean it isn't larger, bulk is relative to size. At equal weights, even more at equal lenghts, nothronychus is definitely bulkier than a tyrannosaur, and if it is only because it has a much shorter tail. |
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| MysteryMeat | Mar 14 2013, 01:02 AM Post #2278 |
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Herbivore
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Bulkiness and robusiticity aren't necessarily the same thing. Robust is usually used to describe the bones or skeleton, no the overall bulkiness of the superficial appearance. Therizinosaurs are bulky due to the big hips and gut, since it's an herbivore. I don't think the bones are more robust than say, a T. rex's. |
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| theropod | Mar 14 2013, 08:41 PM Post #2279 |
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palaeontology, open source and survival enthusiast
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robusticity can also refer to compact body shape. I think we all agree viewed from the outside, triceratops is a more robust animal than galimimus, regardless of its bones. the point is, bulk is not an absolute metric, it has to be regarded relative to size. T. rex is larger than therizinosaurus, but at the same size therizinosaurus is far bulkier. T. rex is smaller than spinosaurus, but yet it is bulkier. If you claim T. rex was bulkier than therizinosaurus, spinosaurus is also bulkier than T. rex. In every scenario It isn´t the bulkiest, but I´d say it is possibly the bulkiest or among the bulkiest carnivorous theropods.
Edited by theropod, Mar 14 2013, 08:41 PM.
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| Vivyx | Mar 16 2013, 04:45 PM Post #2280 |
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Felines, sharks, birds, arthropods
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I'm actually changing my mind and saying Spinosaurus. |
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