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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,361 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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| theropod | Sep 2 2012, 03:12 AM Post #301 |
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palaeontology, open source and survival enthusiast
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true, it could fit the 16m figure. |
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| blaze | Sep 2 2012, 04:55 AM Post #302 |
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Carnivore
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Nope, the description paper makes no specific mention about body size other than saying it was comparable to the C. saharicus neotype. The believe that C. iguidensis is larger is all bs from the press and amateur sites regurgitating what the popular press said. All of the biggest theropods, with the exception of spinosaurus seem to reach the same maximum body size (C. saharicus neotype and G. carolinii holotype, skull ~1.6m, femur 1.43-1.45m both being in the same size range as Sue). |
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| Jinfengopteryx | Sep 2 2012, 05:12 AM Post #303 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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So, is it true that Carcharodontosaurus was bigger than Giganotosaurus? |
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| blaze | Sep 2 2012, 05:46 AM Post #304 |
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Carnivore
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I would say they're the same size, unless MUCPv-95 is decidedly larger than the holotype then Giganotosaurus is slightly bigger but then we're talking about a minuscule sample size (2-3 specimens for both) and IMO it makes more sense to say they're the same size anyway. |
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| Carcharadon | Sep 4 2012, 12:42 AM Post #305 |
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Shark Toothed Reptile
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And people are only saying Spino would win because they saw jurassic park 3.
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| Fragillimus335 | Sep 4 2012, 01:21 AM Post #306 |
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Omnivore
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Nah, it would win cause it's gigantic and has a pretty powerful bite. |
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| Verdugo | Sep 4 2012, 01:38 AM Post #307 |
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Large Carnivores Enthusiast
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Yes you're right, i have some quotes from Spino's fanboys This is from WolverineClaws on http://animalvsanimal.yuku.com/topic/12/Spinosaurus-vs-T-Rex-who-wins?page=1#.UETT6cHN9yU "Spinosaurus was a lot bigger then T Rex. On top of that T Rex as all but a scavenger with tiny arms." "Definitely so a Spinosaurus was not only larger and stronger. It was more agile, had greater balance, and had much longer arms. Spinosaurus wouldn't have much trouble defeated a TRex. Which was primarily a scavenger. " "Definitely so. A Spinosaurus would run Circles around T-Rex, Getting around him at will. No contest here." "Spinosaurus was heavier and taller, as well as having arms that were usefull, more agile, one hit from the tail would end trex as well." What's a retarded Spino fanboys. Spino is simply overrated toooo much
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| SpinoInWonderland | Sep 4 2012, 01:41 AM Post #308 |
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The madness has come back...
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All your quotes pale in comparison to this one:
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| Carcharadon | Sep 4 2012, 01:49 AM Post #309 |
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Shark Toothed Reptile
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That's exactly why I say Spinosaurus is overrated, but ya we know its also underrated but we got opinions |
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| Apex | Sep 4 2012, 01:56 AM Post #310 |
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Omnivore
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im sure this guy put trex had a 65 ton bite force |
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| theropod | Sep 5 2012, 06:10 AM Post #311 |
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palaeontology, open source and survival enthusiast
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![]() Spinosaurus aegyptiacus: 18m Tyrannosaurus rex: 12,3m this should put an end to this debate PS: And YES, this T. rex head is oversized, much more than other theropods skulls would be when scaled to correct body lenght. now if you tell me spinos head was also too large: ok, but it´s not as much too large as that of T. rex, so it would end up larger compared to it actually, and2m spinosaurus skull is actually not unlikely, at least far far far more likely than a T. rex skull that size. as you see, T. rex measurements are made as long as possible... Edited by theropod, Sep 5 2012, 06:11 AM.
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| Fragillimus335 | Sep 5 2012, 11:44 AM Post #312 |
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Omnivore
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The king is dead. |
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| TheROC | Sep 5 2012, 12:25 PM Post #313 |
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Herbivore
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Both T.rex and Spinosaurus are far too tall at the hip in that drawing. But I like the art on that Spinosaurus nonethless. Reminds me of a giant turkey, mixed with a heron or stork or something. |
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| Gecko | Sep 5 2012, 01:44 PM Post #314 |
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Autotrophic Organism
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Spinosaurus with 1.75 m skull, Tyrannosaurus with 132 cm femur![]() And if you don't like that one here is the scale from the Dal Sasso paper...
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| Fragillimus335 | Sep 5 2012, 02:10 PM Post #315 |
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Omnivore
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And if you don't like either of those...A spino with a proper ~1.95 meter skull
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And people are only saying Spino would win because they saw jurassic park 3.




2:24 AM Jul 14