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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,229 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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| Vivyx | Mar 16 2013, 04:46 PM Post #2281 |
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Felines, sharks, birds, arthropods
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Tyrannosaurus actually has a good chance against Light Green Spinosaurus. |
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| Jinfengopteryx | Mar 16 2013, 05:42 PM Post #2282 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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The Spinos in the comparision don't seem to be measured along the curve. |
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| theropod | Mar 17 2013, 12:06 AM Post #2283 |
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palaeontology, open source and survival enthusiast
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they all have oversized skulls for sure, T. rex included. |
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| Jinfengopteryx | Mar 17 2013, 01:10 AM Post #2284 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Assuming one of these squares is 2 m, Tyranno has a 2 m long skull and Spino a 2,5 m one. I haven't noticed that. Edited by Jinfengopteryx, Mar 17 2013, 01:12 AM.
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| theropod | Mar 17 2013, 01:20 AM Post #2285 |
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palaeontology, open source and survival enthusiast
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Yes, pretty much. that's what i mean, EVERY theropod ends up too large if scaled to published lenghts figures, those are good for comparisonal purposes but hardly the lenght the animal ever had in life. |
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| Temnospondyl | Mar 18 2013, 07:53 PM Post #2286 |
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Stegocephalia specialist.
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8 ton Sue would be a
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| Temnospondyl | Mar 18 2013, 07:54 PM Post #2287 |
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Stegocephalia specialist.
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Tyrannosaurus is actyally too tall. |
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| Jinfengopteryx | Mar 19 2013, 12:28 AM Post #2288 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Could you please give somewhat of an argumentation? Read this: https://lh4.googleusercontent.com/-JYOOysBikDI/URVs1XEmmtI/AAAAAAAAAEI/pLY8h_9OQqw/s649/Bild+17.png From "M. Henderson: Estimating the masses and centers of mass of extinct animals by 3-D mathematical slicing. In: Paleobiology. 25, Nr. 1, 1999, pp. 88–106" This was for a "normal" morph, in his text he wrote that a robust morph (like Sue, where we are talking about) would weigh 500 kg more, what comes close to 8 t (7,7 t). About the rest, go here. Edited by Jinfengopteryx, Mar 19 2013, 12:43 AM.
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| theropod | Mar 19 2013, 12:42 AM Post #2289 |
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palaeontology, open source and survival enthusiast
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No it is not it is bulky, but not a fat sausage 9,5t definitely looks like one, and that's simply because its ribs are wrongly articulated and its torso lacks curvature. 8t is perfectly valid |
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| mega t.rex the magnificent | Mar 19 2013, 04:49 AM Post #2290 |
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Autotrophic Organism
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I don't know but I kind of think that spinosaurus s teeth won't do a lot of damage since the teeth were suited for eating fish. Or would they cause damage? |
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| Ausar | Mar 19 2013, 05:38 AM Post #2291 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Spinosaurus' teeth were designed to grip onto slippery prey such as fish. Its tooth morphology IMO was kind of like a crocodile's; cone-shaped. And crocodiles can deliver devastating bites. So IMO, Spinosaurus' teeth could do significant damage. |
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| dinosaur | Mar 21 2013, 01:47 AM Post #2292 |
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Heterotrophic Organism
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![]() Look at this skull!!! Really wimpy and means Nothing! It's all dumb stuff! A host, a con!!! A FRONT!!! |
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| 7Alx | Mar 21 2013, 02:23 AM Post #2293 |
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Herbivore
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....meh. That's Amphicoelias shit. I don't really need to see his comments. How old is Dinosaur? No way that 20 year people would behave like He. |
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| Black Ice | Mar 21 2013, 02:28 AM Post #2294 |
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Drom King
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He's eight. |
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| Vivyx | Mar 21 2013, 03:26 AM Post #2295 |
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Felines, sharks, birds, arthropods
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Lol. |
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