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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,339 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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| Grey | Sep 27 2012, 07:16 AM Post #631 |
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Kleptoparasite
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This is the same guy presented here with megalodon, of course less hyped...
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| Black Ice | Sep 27 2012, 07:19 AM Post #632 |
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Drom King
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| FireCrown | Sep 27 2012, 07:39 AM Post #633 |
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Felines,Ursids,and Canid
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how did you change your rank title |
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| Fragillimus335 | Sep 27 2012, 08:17 AM Post #634 |
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Omnivore
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That would be a good one, very impressive. |
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| blaze | Sep 27 2012, 08:39 AM Post #635 |
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Carnivore
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The one Verdugo posted from Planet Dinosaur is the best IMO |
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| Grey | Sep 27 2012, 09:36 AM Post #636 |
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Kleptoparasite
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Spinosaurus is too "monster" in the last pic, with its holes in the sail. I prefer the Planet Dinosaur depiction, well done, realistic and featuring only an animal, an enormous carnivorous animal. Dinosaurs were not monsters. |
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| Verdugo | Sep 27 2012, 11:06 PM Post #637 |
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Large Carnivores Enthusiast
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They are both from Discovery channel, no wonder why... BTW, that size scale is inaccurate, 10m for T rex ??. That's way too low, even MOR 1125 is larger than that |
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| Grey | Sep 28 2012, 12:14 AM Post #638 |
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Kleptoparasite
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Don't take into account the squares, they are not scaled up properly to the animals.
Edited by Grey, Sep 28 2012, 12:15 AM.
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| Verdugo | Sep 28 2012, 12:25 AM Post #639 |
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Large Carnivores Enthusiast
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So what are the square for ? For showing ??. Anyway, it just a TV show
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| Grey | Sep 28 2012, 12:33 AM Post #640 |
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Kleptoparasite
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Trying to figure on a human shape, no square fits. I've taken some informations, the TV show is quite correct in its depictions, including this one. Except that megalodon looks too much like a white shark. But that's another story... |
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| SpinoInWonderland | Sep 28 2012, 12:36 AM Post #641 |
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The madness has come back...
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The megalodon in that image, if 1 square = 1 square meter, would be roughly 17.5 meters long, not too large..the size of the Tyrannosaurus is the wrong one there, the documentary fudged up the size of Tyrannosaurus like what Planet Dinosaur did to Spinosaurus in the size comparison charts |
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| Jinfengopteryx | Sep 28 2012, 12:44 AM Post #642 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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| Verdugo | Sep 28 2012, 01:41 AM Post #643 |
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Large Carnivores Enthusiast
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Thanks, but i can't find the "Member Title"
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| Jinfengopteryx | Sep 28 2012, 03:13 AM Post #644 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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I think when you edit your profile, it's at the very top. |
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| Verdugo | Sep 28 2012, 03:22 AM Post #645 |
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Large Carnivores Enthusiast
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![]() Where ?? I can't find it
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