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| Spinosaurus aegyptiacus v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 7 2012, 02:16 AM (459,149 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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| Ausar | Mar 26 2014, 08:30 AM Post #3481 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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While I didn't have to get involved, when I see something that I feel I need to express my opinion on, I will get involved. We get the "bacterial bite" thing and it's true that we're over that. But that's not quite the issue. Despite all this, I think we can both agree that this isn't something to waste energy over, so I'm done. |
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| Canadianwildlife | Mar 26 2014, 05:33 PM Post #3482 |
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Apex Predator
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I apologize. |
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| Animal man | Mar 27 2014, 07:35 AM Post #3483 |
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Herbivore
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| ArachnidKid | Mar 28 2014, 02:32 AM Post #3484 |
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Heterotrophic Organism
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Not necessarily he made valid points even after he admitted he preferred mammals and living animals, anyone cannot simply overlook what he says due to lack of insight on a topic.If he has reasoning and good judgement imo it can be used to give some perspective to others who are so archaic in their beliefs |
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| spinosaurus rex | Mar 28 2014, 06:02 AM Post #3485 |
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Carnivore
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have you read what he said. he is not well informed on this subject and even admitted it. i'm not saying he's not a very decent reasoner, because he certainly is on other subjects, but he has limited knowlage in this kind of feild and therefore some of his claims shouldn't be taken for granted if there is evidence suggesting otherwise. the claim on spinosaurus having "inadiquate jaws" are among them. |
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| ArachnidKid | Mar 29 2014, 12:07 AM Post #3486 |
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Heterotrophic Organism
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i think this should clear up any confusion that previously had been here |
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| spinosaurus rex | Mar 30 2014, 08:37 PM Post #3487 |
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Carnivore
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no. it doesn't. your completly missing the point. unless his reasonings is not strong torwards a particular subject.if a person studies nothing but flora for his/her life, you think he would instantly have a great knowlage about the anatomical features, studies, and mechanics of fauna? besides, i don't know why you still doing this. no one is dimeaning him. just saying his knowlage on this particulear subject is not strong enough. and whats funny is that even though your still carrying on, he even admitted he's not the most well informed person to look up to for sources on this subject. anyway, this is terribly off subject. this is the last time i'm making a post on this discusion |
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| Bob5 | Apr 19 2014, 04:49 AM Post #3488 |
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Autotrophic Organism
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The T-Rex's heavy build and big bite would slightly edge the spino's size and large claws |
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| spinosaurus rex | Apr 19 2014, 05:10 AM Post #3489 |
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Carnivore
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all in a matter of opinian at this point |
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| ArachnidKid | Apr 19 2014, 06:12 AM Post #3490 |
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Heterotrophic Organism
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there was never a point in which the decided winner wasn't subjective.. |
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| Arovinrac | Apr 19 2014, 09:56 AM Post #3491 |
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Herbivore
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Dinosaurs are living things around today |
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| ArachnidKid | Apr 19 2014, 01:43 PM Post #3492 |
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Heterotrophic Organism
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Not sure why someone took down the poll.. |
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| retic | Apr 21 2014, 03:33 AM Post #3493 |
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snake and dinosaur enthusiast
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damn, i can't wait for Hartman's mass estimates. |
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| TheROC | Apr 21 2014, 06:08 AM Post #3494 |
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Herbivore
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^Did he give any time frame for that? |
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| TheMechaBaryonyx789 | Apr 21 2014, 07:38 PM Post #3495 |
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Herbivore
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Nope, he only mentioned it as far as I'm aware |
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You have to admit though, the rexes jaws are more built for large terr- prey. Its quite obvious by just comparing both animals jaws.


2:23 AM Jul 14