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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,249 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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| Superiron21 | Feb 6 2013, 08:57 AM Post #1981 |
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Autotrophic Organism
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But we really don't know how much the sail weight (only the bones but how about the muscles?)... seriously how much do you think Spino weights? I think is in 9.-11 tons when T.rex has 7-9 tons? there´s no such a difference that you're claiming.. The diplodocus thing was not to say that is the same case that spino is to make you take in consideration that if spino is longer is not so much heavier and neither stronger than T-rex... I agree that Spino is longer and little bit heavier but that enough to claim to give him the victory? I don't think so.... been bulkier means being stronger... and how about agility... T.rex is more agile than Spino isn´t it? agility is a good advantage... and the binocular vision? it gives T.rex the ability to see where to hit or to bite in a more precisely way... Again that's not 100% all for T.rex I think that depends on who attacks first, which part of the body is attacking... |
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| Superiron21 | Feb 6 2013, 08:57 AM Post #1982 |
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Autotrophic Organism
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| Superiron21 | Feb 6 2013, 09:04 AM Post #1983 |
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Autotrophic Organism
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Are you studying paleontology? how much time till you finish? well according to you which is the size of spino and aprox. the weight? For you in this fight who do you consider could be victorious most of the times (I know that is not 100% for one side) Edited by Superiron21, Feb 6 2013, 09:21 AM.
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| TheROC | Feb 6 2013, 09:08 AM Post #1984 |
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Herbivore
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Superiron, question for you, if T.Rex weighs 9 tons at 12.2 meters long, how much do you estimate Spinosaurus will weigh at the same length? |
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| Superiron21 | Feb 6 2013, 09:53 AM Post #1985 |
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Autotrophic Organism
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Well it could weight less than that T.rex that's for sure, T-rex is more robust and it's bones are too.....so.... Edited by Superiron21, Feb 6 2013, 09:57 AM.
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| TheROC | Feb 6 2013, 11:08 AM Post #1986 |
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Herbivore
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That goes without saying, everyone agrees with it weighing less at parity, but again how much less? If T.Rex is 9 tons, how many tons is Spinosaurus at the same length? What percentage of 9 tons? Edited by TheROC, Feb 6 2013, 11:08 AM.
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| MightyMaus | Feb 6 2013, 11:55 AM Post #1987 |
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Autotrophic Organism
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I think he is scared to answer.... ![]() Anyone who believes an 18 meter Spino weighed 9 tons is a loon. That means at 12.2 meters it would only weigh 2.8 tons! Hahaha... A much more likely weight would be 16-18 tons. This would make Spinosaurus ~5.4-5.6 tons at 12.2 meters. |
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| Black Ice | Feb 6 2013, 11:58 AM Post #1988 |
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Drom King
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Why not just use the 9t Sue against a 15t spino, judging by the comments, that should be fair. |
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| Superiron21 | Feb 6 2013, 12:06 PM Post #1989 |
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Autotrophic Organism
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Edited by Superiron21, Feb 6 2013, 12:07 PM.
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| MightyMaus | Feb 6 2013, 12:13 PM Post #1990 |
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Autotrophic Organism
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You are still way off. If a 17m Spino only weighed 11 tons, it would weigh a mere 4 tons at 12.2 meters...less than half of what you think Tyrannosaurus weighed at that length....There is simply no way Spinosaurus was half Tyrannosaurus weight at parity lengths. A 17 meter Spinosaurus weighed 14 tons at the absolute least. |
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| Superiron21 | Feb 6 2013, 12:18 PM Post #1991 |
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Autotrophic Organism
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more believable 14 tons but I´m still believing that because is not so robust Spino's bones and constitution could max 12-13 but that's your opinion and I respect that... Edited by Superiron21, Feb 6 2013, 12:19 PM.
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| mega t.rex the magnificent | Feb 6 2013, 12:23 PM Post #1992 |
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Autotrophic Organism
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Tyrannosaurus will win easily. Its teeth are larger than spino's and they crush. To me, crushing is better than slicing. Also, Tyrannosaurus is more muscular and bulkier. |
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| TheROC | Feb 6 2013, 01:00 PM Post #1993 |
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Herbivore
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17 meters and 12 tons, would then require a 12.2 meter one to be ~4.44 tons. That does not fly with me, sorry. That would mean Spinosaurus would weigh no more at that size than what an elephant seal can reach. Edited by TheROC, Feb 6 2013, 01:01 PM.
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| SanR | Feb 6 2013, 05:10 PM Post #1994 |
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Unicellular Organism
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Notice the second part of my post... Plus I actually didn't mean when using MSMN V4047 we should use those larger ones I meant when using extremely liberal estimates for it then we should compare that with a liberal estimate for Tyrannosaurus OR a fragmentary giant. I don't believe in either of the liberal estimates I was trying to show that we couldn't compare liberal to average. Edited by SanR, Feb 6 2013, 05:11 PM.
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| Jinfengopteryx | Feb 6 2013, 07:05 PM Post #1995 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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But the others aren't bad studied either. UCPC 2 has also been already described in detail, in the same paper as MSMN V4047. We also have size estimates for MNHN SAM 124 (Holotype sized). Not too far off, at 11m, it would have a mass comparable to the conservative estimates of Suchomimus (3t). @SanR Or we can use a large Tyrannosaurus specimen (like Sue), instead of an average one, if we use liberal estimates for Spinosaurus. Would that be fair? |
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