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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,265 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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theropod
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I did understand that pretty well more than a year ago, no need to remind me. unfortunately, I don´t give a coin on your opinion on my work either, because it is ridiculous.
Edited by theropod, Jan 28 2013, 02:18 AM.
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Superiron21
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brolyeuphyfusion
Jan 27 2013, 01:27 PM
Superiron21
Jan 27 2013, 05:55 AM
"Sail? It's more likely a muscular ridge."
I don't see that is a muscular... most of the paleontologist think that the sail was for thermoregulation.... and the sail is more fragile than strong....
No they don't, the sail thing actually came from nowhere, Stromer actually suggested a fatty hump...

From now on, I'm just gonna ignore you, I can't even have a single discussion with you that doesn't show your bias...
Thank god I´m not gonna stand your pathetic based on nothing haters argument..... Here there are impartial people and that's what I really appreciate....
Edited by Superiron21, Jan 28 2013, 02:22 AM.
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Maelstrom
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Superiron21
Jan 28 2013, 02:21 AM
Thank god I´m not gonna stand your pathetic based on nothing haters argument..... Here there are impartial people and that's what I really appreciate....
Are you impartial?
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Grey
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Regarding the thread, one major questioning is the ability of Spinosaurus teeth to inflict or not critical damages on the neck a big game hunting theropod and to resist to shocks and pressures during a battle.


Regardless, it seems pretty clear that Spinosaurus main weapon to kill larger animals would be its arms rather than its mouth. Here again, we don't have one preserved part.
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Superiron21
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Maelstrom
Jan 28 2013, 02:27 AM
Superiron21
Jan 28 2013, 02:21 AM
Thank god I´m not gonna stand your pathetic based on nothing haters argument..... Here there are impartial people and that's what I really appreciate....
Are you impartial?
I wasn't talking about me... I was talking about another people including yourself... I consider you impartial in your posts....
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Maelstrom
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Superiron21
Jan 28 2013, 02:36 AM
I wasn't talking about me... I was talking about another people including yourself... I consider you impartial in your posts....
Well thanks for considering me as impartial, I meant to say you were were saying was contradictive, for example calling someone a hater for thinking that Spinosaurus would win in a fight against T.rex, which is what you did to broly. Sure broly dislikes T.rex but he isn't as bad as he used to be.
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Jinfengopteryx
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Grey
Jan 28 2013, 02:32 AM
Regarding the thread, one major questioning is the ability of Spinosaurus teeth to inflict or not critical damages on the neck a big game hunting theropod and to resist to shocks and pressures during a battle.


Regardless, it seems pretty clear that Spinosaurus main weapon to kill larger animals would be its arms rather than its mouth. Here again, we don't have one preserved part.
I don't think the arms of Spinosaurus could be used for killing, rather for gripping probably, I don't know how freely it could move the arms, but it probably couldn't use them cat or bear like.
Edited by Jinfengopteryx, Jan 28 2013, 02:46 AM.
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theropod
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However it shouldn´t have problems reaching T. rex, the arms where probably long enough and it might have had a decent height advantage.

I too see these claws as gripping tools, but imagine what damage they could cause nevertheless, due to their sheer size. It is not really important which of it´s weapons it uses, at it´s higher estimates it has the mere raw power to pretty much easily get the job done.
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Jinfengopteryx
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I know that it could hit T-rex with it, I simply don't think they were a tool for attacking large opponents.
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Superiron21
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Maelstrom
Jan 28 2013, 02:41 AM
Superiron21
Jan 28 2013, 02:36 AM
I wasn't talking about me... I was talking about another people including yourself... I consider you impartial in your posts....
Well thanks for considering me as impartial, I meant to say you were were saying was contradictive, for example calling someone a hater for thinking that Spinosaurus would win in a fight against T.rex, which is what you did to broly. Sure broly dislikes T.rex but he isn't as bad as he used to be.
According to most of his posts he always try in every single fight to underrated t-rex... even when is impossible.... having an opinion is one thing..... but this is totally different.... but I don't want to argue with him... let's change the route to the main topic...
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Maelstrom
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Superiron21
Jan 28 2013, 03:02 AM
According to most of his posts he always try in every single fight to underrated t-rex... even when is impossible.... having an opinion is one thing..... but this is totally different.... but I don't want to argue with him... let's change the route to the main topic...
Ok then, back to topic. I think T.rex would win against lower estimates for Spinosaurus because of better weaponry, but loses against Spino's higher estimates due to huge size advantage.
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MightyMaus
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Grey
Jan 27 2013, 06:27 PM
MightyMaus
Jan 27 2013, 06:04 PM
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Just thought this pic of MSNM V4047 looked especially impressive! For some reason it looks larger than 1 meter to me? Imagine the whole skull!
Honestly, I'm no tyrannosaur fanboy and I love Spino but I think this is way more striking to the mind.

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It hurts me to write that but Spino's snout looks ridiculous here...
Don't forget that this is only 1/2 of Spinosaurus's skull, and it's pretty far in the background! Here is a very rough idea of the whole skull.

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Yeah, it's not in ventral view, but those are hard to find! :)
Edited by MightyMaus, Jan 28 2013, 03:10 AM.
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Maelstrom
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MightyMaus
Jan 28 2013, 03:09 AM
Don't forget that this is only 1/2 of Spinosaurus's skull, and it's pretty far in the background! Here is a very rough idea of the whole skull.

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Either way T.rex's skull is much more impressive.
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Godzillasaurus
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Maelstrom
Jan 28 2013, 03:10 AM
MightyMaus
Jan 28 2013, 03:09 AM
Don't forget that this is only 1/2 of Spinosaurus's skull, and it's pretty far in the background! Here is a very rough idea of the whole skull.

Posted Image
Either way T.rex's skull is much more impressive.
But that doesn't make spinosaurus a wimpy sardine eater. The jaws of spinosaurus may be thin in comparison to most large theropods, but it wasn't defenseless.
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Maelstrom
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Godzillaman
Jan 28 2013, 03:17 AM
But that doesn't make spinosaurus a wimpy sardine eater. The jaws of spinosaurus may be thin in comparison to most large theropods, but it wasn't defenseless.
I've never stated so, infact I favour Spino 60/40 anyway.
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