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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,277 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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| Godzillasaurus | Jan 24 2013, 10:46 AM Post #1561 |
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Reptile King
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Teensy? You are talking about a dinosaur with one of the largest bite forces in all of history! Livescience.com states that the posterior area of the mandible of an adult tyrannosaurus may range from around 7,000 pounds to around 13,000 pounds of force. Here is the article in case you are interested: Tyrannosaurus Bite Force |
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| Superiron21 | Jan 24 2013, 10:50 AM Post #1562 |
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Autotrophic Organism
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thanks... one pal that know what I´m talking about-- |
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| Superiron21 | Jan 24 2013, 10:52 AM Post #1563 |
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Autotrophic Organism
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First thing I totally agree with you... GOOD JOB MAN.... but I have a question... carcharodontosaurus skull is not just a maxila and sereno´s had been reconstructed a little oversized? according to real data what are the measurements of the carcharodontosaurus most complete? Edited by Superiron21, Jan 24 2013, 11:01 AM.
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| MightyMaus | Jan 24 2013, 11:13 AM Post #1564 |
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Autotrophic Organism
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Everything about Tyrannosaurus is small compared to Spinosaurus, except for its bite. I'll give you a scale....
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| SpinoInWonderland | Jan 24 2013, 11:14 AM Post #1565 |
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The madness has come back...
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Size is not strength? Excuses much? Then why is an Apatosaurus much much stronger than a Spinosaurus? Size, duh! And show me proof that Carcharodontosaurus and/or Tyrannosaurus was stronger than Spinosaurus, and I do NOT mean bite force, I mean overall body strength... And size is a huge factor in a fight, intimidation is a bonus that comes with it... |
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| Godzillasaurus | Jan 24 2013, 11:21 AM Post #1566 |
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Reptile King
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Which tyrannosaurus reconstruction are you using? |
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| MightyMaus | Jan 24 2013, 11:31 AM Post #1567 |
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Autotrophic Organism
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It is Shartman's newest Sue reconstruction. |
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| Godzillasaurus | Jan 24 2013, 11:38 AM Post #1568 |
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Reptile King
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Who is Shartman? I need to read a little bit about this before I come to any conclusions. |
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| SpinoInWonderland | Jan 24 2013, 11:40 AM Post #1569 |
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The madness has come back...
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It seems like Tyrannosaurus would rather use it's head like a battering ram rather than use it's jaws if it wants to survive the battle with Spinosaurus... |
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| SpinoInWonderland | Jan 24 2013, 11:41 AM Post #1570 |
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The madness has come back...
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shartman = Scott Hartman |
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| Kunfuzzled | Jan 24 2013, 12:08 PM Post #1571 |
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Autotrophic Organism
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Uhhh why is T.rex missing it's teeth? |
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| SpinoInWonderland | Jan 24 2013, 12:11 PM Post #1572 |
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The madness has come back...
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He probably erased them by accident while erasing the background... |
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| MightyMaus | Jan 24 2013, 01:30 PM Post #1573 |
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Autotrophic Organism
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Precisely... white teeth are a pain in the butt to erase around... ![]() BUT, even with his teeth I don't think Tyrannosaurus stands much of a chance. Edited by MightyMaus, Jan 24 2013, 01:30 PM.
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| TheROC | Jan 24 2013, 01:36 PM Post #1574 |
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Herbivore
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where does that spinosaurus drawing come from? |
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| MysteryMeat | Jan 24 2013, 01:39 PM Post #1575 |
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Herbivore
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That's a decent drawing, but the tarsus is way too long. Gotta use images from the same artist if you wanna compare reconstructions. |
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