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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,152 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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Hatzegopteryx
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mechafire
Mar 4 2014, 09:33 AM
My knowledge of these animals is pretty basic. Excuse me if I'm not going to read 230 pages of posts.

The t.rex has the much more powerful bite. It has large jaw muscles and massive durable teeth. However it is at a disadvantage when it comes to gape. The larger estimates for spinosaurus weight puts it at significantly larger, but usually its at 1.5 times th t.rex's weight. Its jaw has more gape, but its bite is much weaker. Its narrow, elongated haw has more reach and can bite easier. The tyrannosaur is more robust and I think it should overcome the spinosaurus more times than not.
Actually, Vobby had posted about the gape being wide enough. I can't seem to find the post.
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The All-seeing Night
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Hatzegopteryx
Mar 4 2014, 09:44 AM
mechafire
Mar 4 2014, 09:33 AM
My knowledge of these animals is pretty basic. Excuse me if I'm not going to read 230 pages of posts.

The t.rex has the much more powerful bite. It has large jaw muscles and massive durable teeth. However it is at a disadvantage when it comes to gape. The larger estimates for spinosaurus weight puts it at significantly larger, but usually its at 1.5 times th t.rex's weight. Its jaw has more gape, but its bite is much weaker. Its narrow, elongated haw has more reach and can bite easier. The tyrannosaur is more robust and I think it should overcome the spinosaurus more times than not.
Actually, Vobby had posted about the gape being wide enough. I can't seem to find the post.
Thats good for the t.rex
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spinosaurus rex
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tyrannosaurus was more robust when at parity in weights. he won't be that more robust then a larger creature. the jaws are powerful and your reasoning is alright and understandable. i actually think we went through every possability this fight could end up. i concluded that a spinosaurus would probrably win about 52 to 55% of the time at the most. it's obvious other people don't agree, but it's up to them to what they wan't to believe for the reason on tyrannosaurus victory.
spinosaurus lived in an envirment full of predators. so i think it's reasonable to say spinosaurus will know how to defend itself.
if spinosaurus MNSN turns out to be another taxon, it might of had a stronger bite force then we origonally predicted ( still not at the calabir of tyrannosaurus though) and not to mention the size advantage would be very effective to use in close quarter fighting
these are just my reasoning
Edited by spinosaurus rex, Mar 5 2014, 12:07 AM.
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Animal man
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mechafire
Mar 4 2014, 09:33 AM
My knowledge of these animals is pretty basic. Excuse me if I'm not going to read 230 pages of posts.

The t.rex has the much more powerful bite. It has large jaw muscles and massive durable teeth. However it is at a disadvantage when it comes to gape. The larger estimates for spinosaurus weight puts it at significantly larger, but usually its at 1.5 times th t.rex's weight. Its jaw has more gape, but its bite is much weaker. Its narrow, elongated haw has more reach and can bite easier. The tyrannosaur is more robust and I think it should overcome the spinosaurus more times than not.
I agree. no way I'm reading 230 pages of posts.

This thread is going to die like the tiger vs lion thread.
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thesporerex
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As long as I am still breathing it will NEVA DAI!!!
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Canadianwildlife
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lol It shall never die! It must live on! Common, we gotta make it to 300. It would be a record.
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ArachnidKid
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Hatzegopteryx
Mar 4 2014, 03:47 AM
ArachnidKid
Mar 4 2014, 03:34 AM
Carnosaur18
Mar 2 2014, 02:46 AM
man, i'm out. you guys just aren't very open to jackshit...so bye.
lol the same reason i lurk the topic instead of posting data, you have 1 unpopular opinion and you're an antichrist rolleyes
Is it so hard for people to understand? It isn't just an opinion, it's a bunch of baseless speculations that have just been debunked. And when they were debunked, he pretty much got offended by being exposed to how non-credible he is.

No-one called him anti-christ - We debunked a bunch of irrelevant and baseless arguments. Why the hell do people find it so offensive?
i guess you aren't familiar with exaggeration lol clearly none called him that it was just a remark on how he says one thing against the 'information' which is actually jus another members opinion, and suddenly you're vilified for that
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TheMechaBaryonyx789
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http://dml.cmnh.org/2014Mar/msg00047.html
According to Paul Sereno some new Spinosaurus material has been uncovered. Apparently it will change how the current reconstructions of Spinosaurus look and make it the largest known theropod.
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ArachnidKid
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Canadianwildlife
Mar 5 2014, 03:39 AM
lol It shall never die! It must live on! Common, we gotta make it to 300. It would be a record.
300 pages of facts vs speculation is too much for a sane person to sit through! :blink: :blink:
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Maximum size spinosaurus 85%
Equal size t rex 68%






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Jinfengopteryx
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ArachnidKid
Mar 14 2014, 05:03 PM
Canadianwildlife
Mar 5 2014, 03:39 AM
lol It shall never die! It must live on! Common, we gotta make it to 300. It would be a record.
300 pages of facts vs speculation is too much for a sane person to sit through! :blink: :blink:
Don't tell me you guys are really that ignorant on theropods countless explanations why this argument is nonsense.
Let me guess, T. rex size = fact, Spinosaurus size = speculation and therefore T. rex wins, right?
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ArachnidKid
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Jinfengopteryx
Mar 16 2014, 05:53 PM
ArachnidKid
Mar 14 2014, 05:03 PM
Canadianwildlife
Mar 5 2014, 03:39 AM
lol It shall never die! It must live on! Common, we gotta make it to 300. It would be a record.
300 pages of facts vs speculation is too much for a sane person to sit through! :blink: :blink:
Don't tell me you guys are really that ignorant on theropods countless explanations why this argument is nonsense.
Let me guess, T. rex size = fact, Spinosaurus size = speculation and therefore T. rex wins, right?
Not the case at all! If you subconsciously believe these to be the correct labels for viewpoints in this topic than by all means do so, i was referring to how some posters choose not from the merit these animals have but the aesthetics of it all.Rather choose which one looks more vicious and overlook the actual capacity in which they could conduct themselves in a battle
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Jinfengopteryx
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Who in this topic does so? I need evidence that enough posters do so, to call this thread filled with such posts.
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ArachnidKid
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Jinfengopteryx
Mar 18 2014, 11:57 PM
Who in this topic does so? I need evidence that enough posters do so, to call this thread filled with such posts.
For starters i'm not sifting through 230 pages for it but in the first page you can see member Apex mentioning how he believes spino wins just because of size and nothing else.That is creating your decision off of merely superficial bases to support what he thinks.That's one example there are most likely more but as i previously stated, 230 freakin pages!? :blink: no thanks ahaha
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Jinfengopteryx
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I don't want you to look through all the pages, but according to your logic ("300 pages full of baseless speculation"), something like that should be found on every page which is obviously not the case (I have participated in this debate and I can tell you that although there was a lot stupidity, 90% of the comments were far smarter than that).
Edited by Jinfengopteryx, Mar 19 2014, 12:35 AM.
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