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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,115 Views) | |
| Wolf Eagle | Jan 7 2012, 02:16 AM Post #1 |
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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. ![]() 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).
Edited by Taipan, Apr 24 2015, 10:10 PM.
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| genao87 | Jun 20 2015, 06:16 AM Post #3991 |
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Heterotrophic Organism
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You are preaching like that study has been officially been accepted as the final study and ignoring the others.... |
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| Spartan | Jun 20 2015, 06:30 AM Post #3992 |
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Kleptoparasite
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It's the most recent one and currently accepted. |
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| Ceratodromeus | Jun 20 2015, 06:30 AM Post #3993 |
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Aspiring herpetologist
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"it's over guys" no, no it is not -- save perhaps in your mind.Plenty of room left for discussion on this thread. |
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| Fist of the North Shrimp | Jun 20 2015, 07:45 AM Post #3994 |
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vá á orminum
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Well, if we would have properly read the material, Spinosaurus never would have been that benemoth. I mean, reading the works of Stromer alone. |
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| FishFossil | Jun 20 2015, 08:16 AM Post #3995 |
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Herbivore
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Definitely. Also would have helped if world War 2 was never a thing. Then we would still have the type specimen as well.
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| Drift | Jun 21 2015, 10:05 AM Post #3996 |
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High Spined Lizard
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Agreed, It was the final nail in the coffin (for this topic) regardless of anyone who still wished to add their two cents in an attempt to revive this proverbial dead horse. |
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| Lukose | Jun 27 2015, 07:12 AM Post #3997 |
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Autotrophic Organism
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Spinosaurus simply lacks the tools to fight other large, more terrestrial theropods effectively. Especially ones who are well equipped already for fighting other large dinosaurs. Tyrannosaurus wins this, but it's a silly matchup anyway. This is kinda like pitting something like an a flamingo against a hawk. The flamingo might have more mass to throw around, but it's not fair, because the hawk is designed for killing other birds and the flamingo is not. |
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| steakbush1357 | Jun 27 2015, 07:19 AM Post #3998 |
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Autotrophic Organism
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^Agreed. Tyrannosaurus has too many advantages in this match-up. The only advantages Spinosaurus has that I can think of are longer arms/claws and size. |
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| Agentjaguar | Jun 29 2015, 02:26 AM Post #3999 |
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Herbivore
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Sad to see that Spino, a once thought to be spectacular killer, was actually Superman in a fat suit. |
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| Spartan | Jun 29 2015, 02:32 AM Post #4000 |
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Kleptoparasite
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It's still a spectacular killer and certainly not a pushover. |
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| bone crusher | Jun 29 2015, 02:36 AM Post #4001 |
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Heterotrophic Organism
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Spino is just longer now people, not larger as in mass, so aside from longer arms and claws (hardly useful if it can't move swiftly standing on hind legs), there's no advantage whatsoever over t rex, carchy, giga or even Mapu. I can see it would still pose a threat to anything under 6 tons tho. |
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| Agentjaguar | Jun 29 2015, 02:39 AM Post #4002 |
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Herbivore
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Spectacular killer of fish. Meanwhile, T-rex is bringing down 8 ton triceratops. |
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| Ceratodromeus | Jun 29 2015, 02:49 AM Post #4003 |
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Aspiring herpetologist
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It's roughly the same size as most tyrannosaurus specimens! |
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| bone crusher | Jun 29 2015, 03:00 AM Post #4004 |
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Heterotrophic Organism
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Sure but as long as Sue, C.rex and a few other Sue sized rexes exist T Rex still enjoys a major weight advantage. 8400kg vs 7000kg or 9500kg vs 7000 kg depends which source you choose. Better luck next time with a larger Spino I say. |
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| Spartan | Jun 29 2015, 03:08 AM Post #4005 |
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Kleptoparasite
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So it's not spectacular because it kills fish? Are giant sauropods not spectacular just because they don't kill anything?
I doubt any terrestrial predator could kill a 8 ton triceratops.
Why "even" Mapu? |
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no, no it is not -- save perhaps in your mind.

2:23 AM Jul 14