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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,227 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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| Carcharadon | Mar 22 2013, 07:29 AM Post #2311 |
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Shark Toothed Reptile
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Yes i definetly can. Your arguments against spinosaurus are fucking retarded, spino's skull is so much stronger than what you think, your just another fucktard who beloves t.rex/hates spinosaurus. Edited by Carcharadon, Mar 22 2013, 07:30 AM.
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| dinosaur | Mar 22 2013, 07:32 AM Post #2312 |
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Heterotrophic Organism
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No no no no. T.rex 9t Spinosaurus 15t It is not twice the size at all. I do not consider it. Besides t.rex has a bulkier body, better weapons, and it is the more skilled and experienced fighter. |
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| Jinfengopteryx | Mar 22 2013, 07:35 AM Post #2313 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Both weights (9 and 15 t) are probably too much, at least in my opinion. As for 9 t, I have said this enough times and I don't believe Spinosaurus reached the needed length for 15 t, as Suchomimus seems to have a proportionally larger skull than I tought, but I will not discuss with you.
Edited by Jinfengopteryx, Mar 22 2013, 07:36 AM.
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| Carcharadon | Mar 22 2013, 07:35 AM Post #2314 |
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Shark Toothed Reptile
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A 9 ton t.rex is fat |
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| dinosaur | Mar 22 2013, 07:42 AM Post #2315 |
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Heterotrophic Organism
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2 ton Allosaurus is fat. Conservative Allosaurus 1.5 tons T.rex 7 tons Max Allosaurus 2 Tyrannosaurus 9 |
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| DarkGricer | Mar 22 2013, 08:07 AM Post #2316 |
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Omnivore
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Allosaurus is 9 meters long, if not more. A 2 ton individual isn't fat. Also, T.rex was more like 6-7 tons, while Spino was more like 12-14 tons. Also, if you use the largest estimated for T.rex, why don't you use the 21 ton estimate for Spino? Who doesn't want a "Clash of the obese"? Also, you seem to think that Spino is all about biting. Spinosaurus has claws and weight as well. Would you like the have a 13 ton animal smash into you? |
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| Archipithecus | Mar 22 2013, 08:20 AM Post #2317 |
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Heterotrophic Organism
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I think that most huge theropods would stay away from each other, and when they clashed, theyed display instead of fight. They could just cause to much damage to each other |
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| Ausar | Mar 22 2013, 08:32 AM Post #2318 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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I think he was referring to bone crusher's post saying Spinosaurus' skull was a bad joke. |
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| dinosaur | Mar 22 2013, 10:34 AM Post #2319 |
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Heterotrophic Organism
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Well, if I were t.rex, I would use my bone crunching teeth, my battering RAM head, my Sharp and longer foot claws, my tail, and my skills and fighting experience |
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| Carcharadon | Mar 22 2013, 10:46 AM Post #2320 |
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Shark Toothed Reptile
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A 2 ton allosaurus is not fat at all |
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| DarkGricer | Mar 22 2013, 11:31 AM Post #2321 |
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Omnivore
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Let's see. Bone crushing teeth? Sure. Battering ram head? Since when is T.rex known to ram things? Foot claws? It cannot kick. If it did, it would fall over and probably break not only a few bones, but also a couple of laws of physics. Tail? T.rex's tail wan't made to swat things. It was made to be a counter balance. Skills and experience? Bones do not tell you if an animal has great fighting experience or not. Maybe Spinosaurs picked more fights that Tyrannosaurs. So out of the 5 weapons you said T.rex had, it had only really had one of them. |
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| dinosaur | Mar 22 2013, 01:22 PM Post #2322 |
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Heterotrophic Organism
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Tyrannosaurus had a skull to ram. spino doesn't |
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| Jinfengopteryx | Mar 22 2013, 05:17 PM Post #2323 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I know that 9 t is a lot, but it is by far not as ridiculous as 21 t. That estimate is based on the assumption that Spinosaurus had the same built as a 9 t T-rex, as the method was to find an allometric skull relationship, what applies to all theropods. Therefore 9 t for T-rex can't be compared with that, as it is far less ridiculous than 21 t for Spinosaurus. The really most ridiculous estimate for Tyrannosaurus is actually 18 t, that was a super fat version in that study. 9 t was the minimum, filling the outline of an incorrectly mounted skeleton, where the ribs have increased the trunk volume. The 1,5 t estimate for Big Al has a similar error. I can give you my opinion on the weight of Sue, if you want. 1. Spinosaurus' length is still unknown (that's why I would like to wait to summer, until we can continue that, because there the new material is described) therefore it's weight too is. 2. The arms of Spinosaurus are too unknown, so we don't know how long they are, or how useful. 3. Theropod arms are generally placed quite low on the torso, so I don't think they were used in fights with other theropods (exept for maybe in Dromaeosaurs, as they seemingly had the widest range of movement, judging from the picture Verdugo has shown and what was often shown in the feline vs drom debates). Edited by Jinfengopteryx, Mar 23 2013, 02:12 AM.
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| Ausar | Mar 23 2013, 05:45 AM Post #2324 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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IMO, if it tried ramming an opponent with its skull, it would be an inefficient attack. If anything, I think it might be more harmful to the tyrannosaur because it could be potentially disoriented for a good amount of time. |
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| Jinfengopteryx | Mar 23 2013, 06:00 AM Post #2325 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Actually, Tyrannosaurus skull could absorb a lot of stress, due to it's built (the bones aren't very well connected). http://rspb.royalsocietypublishing.org/content/271/1547/1451.full.pdf |
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