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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,371 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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| Jinfengopteryx | Aug 10 2012, 02:47 AM Post #151 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Evidence? Carch was 12-13m long and Giga was >13,2m long. |
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| Black Ice | Aug 10 2012, 02:48 AM Post #152 |
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Drom King
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Charcho was 45 feet Giga was 40 to 43 Charcharo is bigger View the bios on this thread for proof Edited by Black Ice, Aug 10 2012, 02:49 AM.
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| Jinfengopteryx | Aug 10 2012, 03:12 AM Post #153 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Here's my Top 10 list: 1. Spinosaurus aegyptiacus 18m lengh and probably weighing up to 15t, material=a 2m skull 2. The Allosaurid in Germany and Switzerland 15m lengh and based on A . fragilis 8,5 heavy(but it needed more muscels, because of the Square Cube law, so this is probably an underestimation, material=very framentary remains found in a bone mixture, called"Das Monster von Minden"and footprints. 3. Oxalaia quilmoebensis 14m long prabably weighing up to 6-7t, material=1,35m skull(Based on this lengh, I'm looking skeptical to the estimates). 4. Giganotosaurus carolinii >13,2m long and probably weighing up to 7t or more, material=holotype who's more than 50% complete and at least 12,2m long, we've found a skull, who was 1,95m long, this indicates a lengh of at least 13,2m. 5. Carcharodontosaurus iguidensis 13,1m long and probably weighing around of 6,5t, material=1,75m skull(scaled up from the other Carcharodontosaurus species) 6. Saurophaganax maximus 13m long and probably weighing around of 5-6t(scaled from A. fragilis), material=545mm humerus 7. Tyrannosaurus rex 12,1m long on average and 12,3m as maximum, the 12,3m rex is estimated to weigh more ethan 6t, material=complete skeletons 8. Tyrannotitan chubutensis 12,2m long and more than 5t heavy, material=1,4m skull 9. Epanterias amplexus 12,1m long and 4-5t heavy, material=1,1m 10. Carcharodontosaurus saharicus I read estimates from 11m to 13m so I take the medium(12m), probably weighing around of 5t, material=1,6m long skull I had to bann a lot of animals, where I weren't sre abput the material, I'll update this list, but I'll put Tyrannosaurus lower and include other animals, like Deltadromeus and Torvosaurus. It's after lengh, not weight. I banned Mapusaurus, because I'm not sure about the real size(a fanboy claimed, it wasn't bigger than 9m!) |
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| Jinfengopteryx | Aug 10 2012, 03:14 AM Post #154 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Well, Giganotosaurus Holotype is estimated at 40-43m lengh, if you include the longer skull, it get's bigger(=45-48 feet) |
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| Carcharadon | Aug 10 2012, 03:19 AM Post #155 |
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Shark Toothed Reptile
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Carcharodontosaurus was larger than Tyrannotitan and Epanterias |
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| Black Ice | Aug 10 2012, 03:40 AM Post #156 |
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Drom King
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No dude charcharodontosaurus was bigger Giga only had a longer skull Charcharos lowest estimate is 45ft Gigas lowest is 41~43 Edited by Black Ice, Aug 10 2012, 03:41 AM.
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| Jinfengopteryx | Aug 10 2012, 03:52 AM Post #157 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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How is Carcharodontosaurus lowest estimate 45 feet? It is 11-12m and 13m seems to be the maximum. |
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| Black Ice | Aug 10 2012, 04:12 AM Post #158 |
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Drom King
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No its not ask anyone on this site or look up its size Giga 40~43 Charcharo 45~48 |
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| Mauro20 | Aug 10 2012, 04:23 AM Post #159 |
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Badass
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The Tyrannosaurus is so overrated... My vote goes to the Spinosaurus. |
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| Carcharadon | Aug 10 2012, 04:25 AM Post #160 |
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Shark Toothed Reptile
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Well, Spinosaurus is overrated aswell, they both are. |
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| Jinfengopteryx | Aug 10 2012, 04:40 AM Post #161 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Still, I think T rex is more overrated, because of it's king of the dinosaurs title. |
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| Carcharadon | Aug 10 2012, 04:42 AM Post #162 |
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Shark Toothed Reptile
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Tyrannosaurus rex is only overrated, because it's famous! So I don't care if its overrated...
Edited by Carcharadon, Aug 10 2012, 04:42 AM.
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| Jinfengopteryx | Aug 10 2012, 04:43 AM Post #163 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Oh, anyone than what's about theropod, who made this list: http://www.paleo.keepfree.de/Prehistorics11.pdf Edited by Jinfengopteryx, Aug 10 2012, 04:43 AM.
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| Jinfengopteryx | Aug 10 2012, 04:49 AM Post #164 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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What's about this?
http://theropods.blogspot.de/2011/03/theropod-size-part-ii.html |
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| theropod | Aug 10 2012, 05:11 AM Post #165 |
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palaeontology, open source and survival enthusiast
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Giga´s estimate is an underestimate, or at least lower bound. 12,2m is actually 10cm shorter than sue, but something isn´t right here. At lenght parity, Giganotosaurus has somewhat shorter Femur+tibia measurements, while the holotypes are some centimetres longer, and the parytype another 8%. I think 14m isn´t unlikely. Carcharodontosaurus sahahricus largest specimen was estimated to measure 12,7-13m if I´m remembering right, and iguidensis was somewhat larger (theropod.blogspot conservatively stated it´s skull to be 10cm longer, thus about 6% larger). So iguidensis pobably reached 13,5m. Then about Saurophaganax: I think you should write more than that 13m figure. The trend is going upwards. Scaling up from Big Al, we get 13,7 (it is slightly closer in size than USNM 4734), and if the humerus continues to get a bit shorter proportionally (big al is 8% larger, it´s humerus is only 2% longer-I know, only using these two specimens I can´t make any valid conclusion, but you know what I want to show) we could probably arrive at the earlier 15m estimate. Then once more, is there anything setting the german allosauroid apart from Saurophaganax, except for it´s geographical range, which was shown to play no role in the caso of other animals, such as Allosaurus and Torvosaurus? Edited by theropod, Aug 10 2012, 05:12 AM.
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