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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,367 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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Superpredator
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Black Ice
Aug 24 2012, 01:13 AM
The reason I said t rex would win is because of several things
1. Spinosaurus had claws and usable arms, but they were short, not even as long as allosaurus limbs. So how would it use them?
2. If you see a spinosaurid and tyrannosaurid skeleton at the same size, the spiny is very gracile compared to a tyrannosaur
3. Spino may be bigger, but due to its gracile build when compared to a tyrannosaur, I doubt its significantly stronger, if at all.
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4. Tyrannosaurus was the more robust,durable, and more powerful specimen, that counters spinos size adv.
I just don't see how spino could effectively hurt the tyrannosaur.
1) T.Rex had a 1m long arm, Spinosaurus' arm was MUCH longer (as proven by your comparison). The Spinosaurus needs to get in close, control the Rex's head and make some claw wounds.
2) And because of this, Spinosaurus is MUCH heavier.
3) It is probably quite a lot stronger (9 tons (at max) VS 18.4 tons).
4) Robust, yes, but a claw hit from a Spinosaurus to the head is a near instant kill. Durable, well, read the answer to robust. I don't see how a 9 ton animal (at max) could be more powerful than a 18.4ton animal.
Spinosaurus could hurt the Tyrannosaurus by 1) using it's claws, 2) controlling the head or 3) overpowering the Tyrannosaurus.
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Black Ice
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Ima let tyrant handle that but first
Spino must REAR up or get dangerously close to t rexes head to use those claws, in which t rex could just bite and crush spinys windpipe.
Spinys arms were most likely only used in a quadruped stance to catch fish.
Edited by Black Ice, Aug 24 2012, 12:34 PM.
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T-rex had a more powerful bite so if it got it's jaws around Spinosaurus' neck the fight would be over.
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Jinfengopteryx
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EvangelicLizard
Aug 24 2012, 12:43 PM
T-rex had a more powerful bite so if it got it's jaws around Spinosaurus' neck the fight would be over.
First it has to do so and Spino was bigger than on the comparison, it reached AT LEAST 16m, not to mention that you get 17,5m by scaling up from Baryonyx.
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Megafelis Fatalis
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Superpredator
Aug 24 2012, 12:27 PM
1) T.Rex had a 1m long arm, Spinosaurus' arm was MUCH longer (as proven by your comparison). The Spinosaurus needs to get in close, control the Rex's head and make some claw wounds.
2) And because of this, Spinosaurus is MUCH heavier.
3) It is probably quite a lot stronger (9 tons (at max) VS 18.4 tons).
4) Robust, yes, but a claw hit from a Spinosaurus to the head is a near instant kill. Durable, well, read the answer to robust. I don't see how a 9 ton animal (at max) could be more powerful than a 18.4ton animal.
Spinosaurus could hurt the Tyrannosaurus by 1) using it's claws, 2) controlling the head or 3) overpowering the Tyrannosaurus.
Spinosaurus wasn't 18 tons !!
how could an 18m Spinosaurus (and we don't have any evidence about 18m) weigh 18 tons ?
Spinosaurus skull is 1.5 - 1.75m long, a large Spinosaurus would have a 2m skull and a 15m body (using Scott Hartman Skeletal). Baryonyx was about 9.5m and 2000kg, a 15m Spinosaurus would be around 8000kg.
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DinosaurMichael
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Aug 26 2012, 01:52 AM
Superpredator
Aug 24 2012, 12:27 PM
1) T.Rex had a 1m long arm, Spinosaurus' arm was MUCH longer (as proven by your comparison). The Spinosaurus needs to get in close, control the Rex's head and make some claw wounds.
2) And because of this, Spinosaurus is MUCH heavier.
3) It is probably quite a lot stronger (9 tons (at max) VS 18.4 tons).
4) Robust, yes, but a claw hit from a Spinosaurus to the head is a near instant kill. Durable, well, read the answer to robust. I don't see how a 9 ton animal (at max) could be more powerful than a 18.4ton animal.
Spinosaurus could hurt the Tyrannosaurus by 1) using it's claws, 2) controlling the head or 3) overpowering the Tyrannosaurus.
Spinosaurus wasn't 18 tons !!
how could an 18m Spinosaurus (and we don't have any evidence about 18m) weigh 18 tons ?
Spinosaurus skull is 1.5 - 1.75m long, a large Spinosaurus would have a 2m skull and a 15m body (using Scott Hartman Skeletal). Baryonyx was about 9.5m and 2000kg, a 15m Spinosaurus would be around 8000kg.
Spinosaurus maximum size could of been close to 18 tons. I'm sure we all know that wouldn't be their average.

Also seeing TheROC's view of how big Spinosaurus would be. The average size Spinosaurus would be 50 feet long and 12 tons.
Edited by DinosaurMichael, Aug 26 2012, 02:33 AM.
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Fragillimus335
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Spinosaurus wins with ease. Modern weight estimates put Spinosaurus at around 16 tons, thats an 18,000 pound weight advantage over T-rex. Also Tyrannosaurus had ZERO experience fighting other large theropods. While Tyrannosaurus was the only large theropod in it's environment, Spinosaurus had to deal with Carcharodontosaurs and Deltadromeus.
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DinosaurMichael
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Fragillimus335
Aug 26 2012, 02:32 AM
Spinosaurus wins with ease. Modern weight estimates put Spinosaurus at around 16 tons, thats an 18,000 pound weight advantage over T-rex. Also Tyrannosaurus had ZERO experience fighting other large theropods. While Tyrannosaurus was the only large theropod in it's environment, Spinosaurus had to deal with Carcharodontosaurs and Deltadromeus.
Yes, but 16 tons or more may of been it's max. The average size Spinosaurus would've been 12 tons.
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Fragillimus335
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Nope, the only adult Spinosaurus we have scales up to 16 tons from a relatively slender Baryonyx. Max size for Spinosaurus in unknown, but it probably exceeded 18 tons. An average T-rex, on the other hand, would be about 6 tons.
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DinosaurMichael
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Fragillimus335
Aug 26 2012, 03:07 AM
Nope, the only adult Spinosaurus we have scales up to 16 tons from a relatively slender Baryonyx. Max size for Spinosaurus in unknown, but it probably exceeded 18 tons. An average T-rex, on the other hand, would be about 6 tons.
Can you give the source?
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Carcharadon
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Fragillimus335
Aug 26 2012, 02:32 AM
Spinosaurus wins with ease. Modern weight estimates put Spinosaurus at around 16 tons, thats an 18,000 pound weight advantage over T-rex. Also Tyrannosaurus had ZERO experience fighting other large theropods. While Tyrannosaurus was the only large theropod in it's environment, Spinosaurus had to deal with Carcharodontosaurs and Deltadromeus.
You think spino wins easily? Nope
Just because it fought other big theropod doesn't mean its far stronger
T.rex had the bone crushing bite that can crush spinosaurus's neck, and I don't know why everyone thinks size is everything
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Carcharadon
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Superpredator
Aug 24 2012, 11:52 AM
Dark allosaurus
Aug 24 2012, 10:59 AM
Superpredator
Aug 23 2012, 08:36 PM
Black Ice
Aug 22 2012, 06:41 AM
In a fight t rex would destroy spinosaurus
How? Spinosaurus was taller, heavier, more powerful, had usable arms with big claws and had a decent bite.
T.rex has a huge bite force advantage
As it was faster, more intelligent, and much more advanced.
Size, weight, power and arms > Bite-force and agility.
T.rex jaws + On Spinosaurus neck = Dead Spinosaurus
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Fragillimus335
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Well, its because size is everything! Tyrannosaurus could barely even reach Spinosaurus's neck and spino could easily knock rex over and tear it apart. At parity and even with a 1 ton weight advantage rex would still beat spino, but spino weighed 8-10 TONS more, thats far too much to expect from rex.
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Carcharadon
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Fragillimus335
Aug 26 2012, 03:18 AM
Well, its because size is everything! Tyrannosaurus could barely even reach Spinosaurus's neck and spino could easily knock rex over and tear it apart. At parity and even with a 1 ton weight advantage rex would still beat spino, but spino weighed 8-10 TONS more, thats far too much to expect from rex.
Size is not everything. Get your facts straight before you say it is.
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Fragillimus335
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Calm down, tell me why rex could overpower an animal 8 tons heavier than itself.
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