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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,192 Views)
Wolf Eagle
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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.

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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).

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Edited by Taipan, Apr 24 2015, 10:10 PM.
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spinosaurus rex
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spinosaurus rex
Dec 4 2013, 05:19 AM
Sci Fyena
Dec 3 2013, 03:35 PM
Just watch Jurassic Park to see what would REALLY happen.

Because that movie is accurate.
the movie is no where near as accurate as what would really happen. first, both the t-rex and spinosaurus were down sized, spinosaurus couldn't articulate its wrists to grab a t-rex, spinosaurus couldn't break a t-rex neck like that, and if the t-rex ever manage to bite a spinosaurus and pin it to the ground( if only it could, looks like its at a disadvantage at that arena), it is the combination of a 6 ton bite force and 14-15 tons of dinosaur landing on the ground that will kill it.
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Ausar
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If I remember correctly, someone in this debate explained why JP3 shouldn't be trusted through (I think) a video link.


Not that I think it really matters (or relevant at all) as a science-fiction movie obviously has very little credentials.


I don't exactly mind Andrea Cau's view of this topic much, even though hypothetical fights to the death between different species aren't usually something discussed by serious people in paleontology.
Edited by Ausar, Dec 4 2013, 06:52 AM.
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Jinfengopteryx
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Cau has no view on this topic, just on the size of both animals.
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Ausar
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I'm not talking about who he thinks would win a fight. Just what he thinks of debating it.

Vobby
 
Edited by Ausar, Dec 4 2013, 07:36 AM.
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Carcharadon
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Sci Fyena
Dec 3 2013, 03:35 PM
Just watch Jurassic Park to see what would REALLY happen.

Because that movie is accurate.
lol at this comment
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Sci Fyena
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I was being sarcastic. If that was not clear, and I inadvertently incited vehement rage in any of you, I apologize.

Rex wins.
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Jinfengopteryx
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That's the reason why I asked you if you're serious (this was not an attempt to ridicule you), because, for some reason, I'm terrible at recognizing jokes.
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Sci Fyena
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Whew! I was beginning to think that I had offended nearly everyone on the forum.  :'(
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Palaeogirl
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Sci Fyena
Dec 4 2013, 02:55 PM
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I was being sarcastic. If that was not clear, and I inadvertently incited vehement rage in any of you, I apologize.

Rex wins.
Care to elaborate a bit?
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spinosaurus rex
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Sci Fyena
Dec 4 2013, 11:55 PM
Whew! I was beginning to think that I had offended nearly everyone on the forum.  :'(
man you got me good.i was so surprised about what you said that i posted a few inaccurate thing in JPIII, even though just about everyone here already knows it. i feel stupid :P
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Sci Fyena
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@Palaeogirl:

About Tyrannosaurus winning? If so:

I am sure that the preceding 190 pages contain much more technically accurate and specific information regarding bite forces, weight, size, etc., but I'll say this: I am no T. rex fanboy or anything, but despite the fact that it is generally overrated, Tyrannosaurus really does have a monster bite. While the argument that Spinosaurus' piscivory doesn't inherently equate to docility is valid, I think that Tyrannosaurus was equipped with a tremendously powerful and rugged bite that could have overcome the size difference between the two species.
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spinosaurus rex
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yeah, but it also had a restrictive gape. t-rex had a bite force of around 6 tons but was more adapted to kill tough, smaller animals. if spinosaurus can reach as heavy as 14 or more tons, his size advantage can overcome tyrannosaurus bite force. not to mention the combination of a height advantage, size advantage, and strength ( due to size), and a reasonable bite force around 3 tons, i give spinosaurus the advantage
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Sci Fyena
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You bring up some valid points worth consideration. I still think a Tyrannosaurus is better equipped, but I'm not wholly opposed to the idea of a Spinosaurus being able to win in certain circumstances.

Here are some statistics worth consideration:

I couldn't find any cite-worthy sources, but Google says that Tyrannosaurus had a 1.2 meter gape, and Spinosaurus had a 1.4 meter gape. Personally, I think that Tyrannosaurus' stronger bite more than overcomes that disparity.

The following link is to a paper wherein the authors state that the mediolateral bending resistance of the Spinosaurus is lower than that of all extant crocodilians, adjusted for size.

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0065295
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spinosaurus rex
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t-rexs jaws were 1.2 meters. its gape altogether is only around 1 meter, which is again, very restrictive when facing an animal twice your size. i am also not saying t-rex doesn't have a chance, i'm just saying spinosaurus was at a slight advantage. i remember reading an article about spinosaurs being well equip to resist high torque pressures. featuring deeper mandibles and the small crest-like structure on top of their heads that serve as a discharger but i can't for the life of me remember were to find it. i read the article you posted and not sure if i read the chart right, but it looks like spinosaurus can resist more pressure then both the gharial and the alligator. so in turn of being 14 tons, it will still have quite a high torque resistance
Edited by spinosaurus rex, Dec 5 2013, 09:52 AM.
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Carcharadon
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Of course t.rex had a massive bite force, but it didn't have a very large gape. Its gape is clearly not wide enough to get a good grip on spinosaurus, it could only cause fatal damage if it bit the neck, and even then spinosaurus's neck is well out of rex's reach. And if t.rex tried to get to the neck it would just leave itself vulnerable to be clawed or bitten itself (yes, spinosaurus had a rather powerful bite force). Also a headbutt or body collision from spinosaurus could severely wound t.rex.

Imo, its pretty clear that spinosaurus wins just simply due to its sheer size and strength.


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