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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,084 Views)
Wolf Eagle
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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.

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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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Drift
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High Spined Lizard
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Ceph
Apr 4 2017, 08:54 AM
Great joke guys. Got love Rick Astley. I do have to express a bit of concern that this may escalate into a major influx of fake links. Let's not get carried away please.
They just want to get this to three hundred pages imo,they've nothing to add because nothing can be added.This "dilemma" sparked in 2001 has since been laid to rest by any knowledgeable individual.
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SETA222
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Quote:
 
They just want to get this to three hundred pages imo,they've nothing to add because nothing can be added.This "dilemma" sparked in 2001 has since been laid to rest by any knowledgeable individual.

Complains about people posting, makes a post himself.
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Ceratodromeus
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Drift
Apr 16 2017, 03:54 AM
Ceph
Apr 4 2017, 08:54 AM
Great joke guys. Got love Rick Astley. I do have to express a bit of concern that this may escalate into a major influx of fake links. Let's not get carried away please.
They just want to get this to three hundred pages imo,they've nothing to add because nothing can be added.This "dilemma" sparked in 2001 has since been laid to rest by any knowledgeable individual.
How stupid can you truly get
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Thalassophoneus
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Pelagic Killer
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Ceratodromeus
Apr 16 2017, 06:06 AM
Drift
Apr 16 2017, 03:54 AM
Ceph
Apr 4 2017, 08:54 AM
Great joke guys. Got love Rick Astley. I do have to express a bit of concern that this may escalate into a major influx of fake links. Let's not get carried away please.
They just want to get this to three hundred pages imo,they've nothing to add because nothing can be added.This "dilemma" sparked in 2001 has since been laid to rest by any knowledgeable individual.
How stupid can you truly get
Dude, come on. You don't need to become aggressive towards him. He was simply trying to find a way to lead the talk to the claim "Tyrannosaurus definitely beats Spinosaurus and I am definitely not saying this to contradict Thalassophoneus who likes Spinosaurus and once believed that it beats Tyrannosaurus".
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Ceratodromeus
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Yeah no there is when you're spouting your nonsense over an april fools joke; Im surprised he hasn't been banned at this point.
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Thalassophoneus
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Ceratodromeus
Apr 16 2017, 08:39 AM
Yeah no there is when you're spouting your nonsense over an april fools joke; Im surprised he hasn't been banned at this point.
Seriously now, it isn't necessary to ban him. It is enough that he keeps embarassing himself.
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genao87
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any new studies shown for both Spino and T.Rex? I hope Spino got rid off that low legged version like a Croc.....or is everything the same?
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Thalassophoneus
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genao87
Apr 27 2017, 11:53 PM
any new studies shown for both Spino and T.Rex? I hope Spino got rid off that low legged version like a Croc.....or is everything the same?
It is pretty certain that Spinosaurus was rather short legged. Whether it was quadrupedal is questionable.
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HerpestidaeB4Cat
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a spino would win i think the spino would just overwhelm the rex lean on it til it becomes tired
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Thalassophoneus
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HerpestidaeB4Cat
Aug 20 2017, 05:21 PM
a spino would win i think the spino would just overwhelm the rex lean on it til it becomes tired
That sounds more like masaging rather than a fight.
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TheBatmeme368
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...Anyway, I doubt ANY creature would lean on its opponent to win the fight. I also fail to see how that would work...

Regarding the fight, depends on which specimen of T. rex you use. Stan probably loses (due to being smaller than the vast majority of adult T. rex specimens), the holotype wins imo, as its around the same size (or slightly smaller), but T. rex's bite force was superior. I know bite force isn't everything, but when both of your teeth are not designed for tearing flesh but rely on the power of the bite more than anything else, then yes, it does matter. Spinosaurus' bite would still do respectable amounts of damage though, since they're quite sharp with a decent bite force behind them. But T. rex's bone crushing spikes and higher bite force should make it more effective in a confrontation like this.

FMNH PR 2081, "Scotty", etc should win without too much difficulty in my opinion, wince the difference in size is about ~20 to 40% between Sue and MSNM V4047, for comparison, The difference between a Male African Lion and a Female is about ~46%. Combine that with greater overall weaponry and there's a win.

And I apologize if I'm not going to read almost 300 pages to see if I've been contradicted, many of said pages were before the 2014 paper on Spinosaurus, reducing it's overall length and publishing the "new" estimates on Spinosaurus' mass (6 to 7 tonnes if I remember correctly).
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Thalassophoneus
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In this specific case bite force is very important. The bite force of Tyrannosaurus is exceptionally high. While Spinosaurus and other giant theropods could cause very serious injuries to creatures of at least similar size, Tyrannosaurus may have been able to instantly crush a bone of another creature.
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Kazanshin
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Another thing is their locomotion/maneuverability, robustness/strength and experience/skill. T-Rex has all those three things. I was more at home on land, had a 6 ton bite with the strength to overpower preys like hadrosaurs that outweighed it by a few tons was a big game hunter.
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Thalassophoneus
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Kazanshin
Aug 25 2017, 12:24 PM
Another thing is their locomotion/maneuverability, robustness/strength and experience/skill. T-Rex has all those three things. I was more at home on land, had a 6 ton bite with the strength to overpower preys like hadrosaurs that outweighed it by a few tons was a big game hunter.
Experience and predator/prey relationships do not say a lot. Spinosaurus would also be a big game hunter if it had the bite force and locomotion abilities of Tyrannosaurus.
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Jinfengopteryx
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Thalassophoneus
Aug 25 2017, 11:11 PM
Kazanshin
Aug 25 2017, 12:24 PM
Another thing is their locomotion/maneuverability, robustness/strength and experience/skill. T-Rex has all those three things. I was more at home on land, had a 6 ton bite with the strength to overpower preys like hadrosaurs that outweighed it by a few tons was a big game hunter.
Experience and predator/prey relationships do not say a lot. Spinosaurus would also be a big game hunter if it had the bite force and locomotion abilities of Tyrannosaurus.
Are you trying to counter the experience argument by saying Spinosaurus could also be a big game hunter if it had the tools? That doesn't make sense to me. I could be in the army if I had a weapon and the proper training, but that does not mean I have any military experience.
But I generally agree that experience is not necessarily an advantage since fighting a Spinosaurus is different from a routine hadrosaur hunt. The prey size is a different thing though. If Spinosaurus did not kill anything Tyrannosaurus sized, this could pose a problem.
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