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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,281 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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| Godzillasaurus | Jan 19 2013, 10:01 AM Post #1501 |
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Reptile King
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| Vivec | Jan 19 2013, 10:48 AM Post #1502 |
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Canid and snake enthusiast.
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YAY! We need a Spino fanboy to balance this out a little bit. |
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| Carcharadon | Jan 19 2013, 01:59 PM Post #1503 |
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Shark Toothed Reptile
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I rather doubt it, are those arms even built for grappling on to things?? it would totally rely on its jaws |
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| mega t.rex the magnificent | Jan 19 2013, 02:26 PM Post #1504 |
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Autotrophic Organism
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first dinosaur, now the spino king? Double fanboys detected! |
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| Godzillasaurus | Jan 19 2013, 02:32 PM Post #1505 |
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Reptile King
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The dinosaur guy is long gone now. I haven't heard from him in the past few days. However, we should just pipe down about him before he comes back and starts trolling again. |
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| mega t.rex the magnificent | Jan 19 2013, 02:33 PM Post #1506 |
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Autotrophic Organism
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right. |
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| Vivec | Jan 20 2013, 10:28 AM Post #1507 |
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Canid and snake enthusiast.
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LOL |
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| Jinfengopteryx | Jan 20 2013, 07:38 PM Post #1508 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I just realized this has now more posts than the Livyatan vs Megalodon therad. |
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| Arovinrac | Jan 20 2013, 07:48 PM Post #1509 |
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Herbivore
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Will it get more than Lion vs Tiger? |
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| 7Alx | Jan 20 2013, 07:55 PM Post #1510 |
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Herbivore
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There are more Spinosaurus fanboys than you think. |
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| SpinoInWonderland | Jan 20 2013, 10:03 PM Post #1511 |
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The madness has come back...
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Their numbers are dwarfed by that of Tyrannosaurus fanboys though, I encountered a lot of Tyrannosaurus fanboys in deviantart and youtube...but I can count the number of Spinosaurus fanboys I encountered in one of my hands... |
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| Godzillasaurus | Jan 20 2013, 11:30 PM Post #1512 |
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Reptile King
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That scared me at the end! |
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| Kurtz | Jan 21 2013, 12:12 AM Post #1513 |
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Kleptoparasite
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At least if the arms of t rex are ridiculous, those of spino are not much more impressive in body ratio. t rex isn't as heavy like a cow, it was heavy. No theropod had arms like godzilla Edited by Kurtz, Jan 21 2013, 12:13 AM.
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| Superiron21 | Jan 21 2013, 01:39 AM Post #1514 |
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Autotrophic Organism
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T-rex arms evolved cause his ancient relatives had longer arms, and they didn´t use it so much so T-rex compensates the arms with the land most powerful bite force and his weight is 30% heavier than previously thought... please research if you wanna talk... |
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| SpinoInWonderland | Jan 21 2013, 02:12 AM Post #1515 |
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The madness has come back...
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That mass estimate is based on a disgustingly fat Tyrannosaurus. That being said, Kurtz can't really be taken seriously when it comes to dinosaurs... |
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