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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,137 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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| The Reptile | Aug 24 2014, 03:38 AM Post #3661 |
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Herbivore
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You know what really grinds my gears? This BS: https://www.youtube.com/watch?v=lshFn-Sngok These pivot fights always end in tyrannosaurus curbstomping every other dinosaur, no joke Edited by The Reptile, Aug 24 2014, 03:38 AM.
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| Ceratodromeus | Aug 24 2014, 03:41 AM Post #3662 |
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Aspiring herpetologist
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it's because some people think tyrannosaurus was this unstoppable killing machine, some of those pivots do give you a good chuckle though |
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| The Reptile | Aug 24 2014, 03:54 AM Post #3663 |
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Herbivore
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Well it is not really about how tyrannosaurus is presented to most people necessarily, but how their brains perceive their obviously favorite dinosaur of all time. Bias is common in younger, less intelligent, and less "professional" dinosaur fans, especially if they are a 100% prime-cut fanboy. Especially if none of them consider the strengths and weaknesses of each animal, there is no way that you will convince them that spinosaurus still has its evolutionary benefits, with a large size being one of the most obvious. I liked that part where the t-rex did a dropkick . That is a pure byproduct of fanboyism ![]() Edit: That was the wrong video. Here is the right one: https://www.youtube.com/watch?v=a_H5Qf4c2ZI Edited by The Reptile, Aug 24 2014, 03:58 AM.
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| Ausar | Aug 24 2014, 04:27 AM Post #3664 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Also hilarious where it sh*ts on its dead opponent.
Edited by Ausar, Aug 24 2014, 05:33 AM.
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| The Reptile | Aug 24 2014, 06:50 AM Post #3665 |
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Herbivore
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Yea that part was really dumb |
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| Drift | Aug 27 2014, 06:20 AM Post #3666 |
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High Spined Lizard
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Questioning my old observation is utterly comedic however, @Jinfengopteryx Not quite, since its embellished existence serves as a reminder that when truth is uttered it's tossed aside, after years of growing a taste for the sweet fictional nature of the majority of this animals capabilities. |
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| The Reptile | Aug 30 2014, 06:40 AM Post #3667 |
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Herbivore
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How many times must we reiterate that MONSTERS RESURRECTED IS INACCURATE AND THAT YOU SHOULD NOT USE IT AS A SOURCE. Of course a lot of what was in the spinosaurus episode was entirely theoretical, but many of those theories were inaccurate and have mislead people into the wrong direction (and yes, I too used to accept some of them, until I read the 2013 paper on spinosaurid feeding mechanics, which made me rethink some of my theories as well). If I am not mistaken, didn't they completely forget to note in the episode that spinosaurus was more than likely a fish eater? All that they said was that its teeth were conical and its skull was slenderized (which both are correct, but these are a given); they went as far to say that it would have killed similarly to macrophagous crocodilian species. So they were correct in that its morphological features were presented correctly, but their ideas as to how it used them were very much overdone and most likely inaccurate. So please stop debating about it to, because it is not worth it Edited by The Reptile, Aug 31 2014, 05:21 AM.
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| theropod | Sep 1 2014, 09:05 PM Post #3668 |
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palaeontology, open source and survival enthusiast
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People are taking MR to heart so much it makes them biased against Spinosaurus. Do I seriously have to mention "documentaries" claiming T. rex averaged at 15m in lenght, were able to outrun every animal and could kill anything on the planet with their armour-piercing bites? Because I know one were none less than Bob Bakker said the latter two. Does it have any meaning? No. Edited by theropod, Sep 1 2014, 09:06 PM.
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| The Reptile | Sep 2 2014, 02:52 AM Post #3669 |
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Herbivore
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Well I still think documentaries should be forgotten completely unless they accurately propose logical hypotheses of how prehistoric animals lived. We know that those 3 claims that you listed are most likely BS, but yet people still use those to support their bias |
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| theropod | Sep 2 2014, 05:08 AM Post #3670 |
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palaeontology, open source and survival enthusiast
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Yes, that’s what I mean. Documentaries should not be important to us, especially if we know they are inaccurate. |
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| The Reptile | Sep 3 2014, 08:11 AM Post #3671 |
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Herbivore
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Well I mean if they are likely accurate (or to the very least propose logical theories as opposed to this "spinosaurus is a ruthless superpredator" nonsense, which I have no clue why people are still discussing it) then there is no reason to dismiss them as invalid. I am just talking about discussing probably INACCURATE documentaries, which is frowned upon either way. Valid theories can very well be discussed, it is just when the documentary in question is providing misinformation that it becomes a problem Edited by The Reptile, Sep 3 2014, 08:12 AM.
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| theropod | Sep 3 2014, 08:53 AM Post #3672 |
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palaeontology, open source and survival enthusiast
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Well, such "logical theories" still should not rely on a documentary as a source. You should be able to explain and elaborate them yourself (or find the actual research works from which they originated). For example there’s no point in citing Planet Dinosaur to support that Spinosaurus was a piscivore. What you should do is either cite one of the (by now) numerous scientific publications that reached this conclusion, or argue what features suggest that Spinosaurus was a piscivore. Or do both. But real scientific theories tend to never originate from documentaries, so you don’t have to, and shouldn’t, make attribution to them. It’s like citing wikipedia instead of Bates & Falkingham 2012 on the fact that T. rex’ bite force was estimated at 5.7t. |
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| Drift | Sep 3 2014, 08:55 AM Post #3673 |
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High Spined Lizard
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No need to let your person feelings get entangled in this topic,trust me when i say i understand that these movies,documentaries,ect, Happen to be horse s.h.i.t,but when people use them like this valid source of information..do you expect me to sit there just letting them soak in the glory of ignorance? I merely shred the stupidity when it rises, i don't stir the waters in search for such rhetoric.
Edited by Drift, Sep 3 2014, 08:56 AM.
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| theropod | Sep 3 2014, 09:19 AM Post #3674 |
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palaeontology, open source and survival enthusiast
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Err, most of your posts on this thread seems to reference and whine about things like Monsters Resurrected or even Jurassic park, often without anyone else bringing them up first (let alone using them as a source)…
Edited by theropod, Sep 3 2014, 09:20 AM.
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| Drift | Sep 4 2014, 03:08 AM Post #3675 |
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High Spined Lizard
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Which is whet drove me initially to respond to said comments in the first place, they were being used like imaginary soap boxes to std on while spewing troll slandered childish opinions not rooted in reality. |
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. That is a pure byproduct of fanboyism
2:23 AM Jul 14