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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,150 Views)
Wolf Eagle
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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.

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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).

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Edited by Taipan, Apr 24 2015, 10:10 PM.
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BoomerSooner
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I know, but it says spino ate fish.
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theropod
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Spinosaurus did eat fish. I don’t see the point. Crocodiles and bears eat fish too.
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BoomerSooner
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All I'm saying is OP is misleading. Because it is. When talking about spino's diet, it simply states "Spinosaurus was thought to have eaten fish", and stops there, nothing else. Surely you can see why that's misleading.

But now that I've been informed, I have no doubt that spino could take on large prey.
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TheMechaBaryonyx789
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The fish is already large prey
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BoomerSooner
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I meant large terrestrial prey.
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theropod
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we already had that, it doesn’t make a difference.

The OP shouldn’t be your primary source of information. It has literally no proper scientific background, it’s just copied from somewhere.
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BoomerSooner
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Okay
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ArachnidKid
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BoomerSooner
Mar 23 2014, 01:18 AM
I'm sure it could hunt large animals if it wanted to. I'm just saying it's jaws are inadequate for such large prey[/u] The modern gharrial can probably hunt bigger animals, but it's jaws are more adept to catching slippery fish. Rex's Jaws look way more robust.

You probably know more than me, I'm just going off what the passage says and a basic observation. I'm not too familiar with this creature.
Agreed, i believe member canadianwildfire touched on this topic as well
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spinosaurus rex
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and guess what, their both wrong on spinosaurus jaws being inadequate.
and no offence to canadianwildlife, but this type of topic is far from his normal specialties and has presented nothing but a couple spamed pages and claims with either zero evidence or just plain rediculous to even take seriously.
Edited by spinosaurus rex, Mar 26 2014, 07:41 AM.
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Canadianwildlife
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spinosaurus rex
Mar 26 2014, 07:15 AM
and guess what, their both wrong on spinosaurus jaws being inadequate.
and no offence to canadianwildlife, but this type of topic is far from his normal specialties and has presented nothing but a couple spamed pages and claims with either zero evidence or just plain rediculous to even take seriously.
What did I do? I acknowledge that I do not specialize on dinosaurs, I prefer mammals, actual living things. I left this thread because my knowledge on this topic and on dinosaurs is very low. Of course most of it is speculation, but good speculation I should say. Blaze seems to be the most knowledgeable on this topic, so people should listen to him, not me. I stopped posting a while ago, and I left for a reason, so don't bring me into this. Spino fans are so touchy. ^o) You have to admit though, the rexes jaws are more built for large terr- prey. Its quite obvious by just comparing both animals jaws. -_-
Edited by Canadianwildlife, Mar 26 2014, 08:00 AM.
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spinosaurus rex
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i ment no harm, i swear.
i ment by you stating spinosaurus wasn't being a valid taxon, dispite evidence suggesting otherwise. and some claims you made were very questionable( tyrannosaurus having a poisonous bite, spinosaurus breaking it's arms trying to reach forward, etc). and since when did i bacame a spinosaurus fan? when have i once overratted spinosaurus to the point were i was dubbed a fan boy?
Edited by spinosaurus rex, Mar 26 2014, 08:17 AM.
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Ausar
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What did I just read?

He was addressing ARACHNIDKID, since the latter has merely brought up the fact that you've had your say. Spinosaurus rex was not the one who brought you into this again if you look at spinosaurus rex addressing him.

What I find especially hilarious is the fact that you accuse him of being a "Spino fan".
Edited by Ausar, Mar 26 2014, 08:04 AM.
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BoomerSooner
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Now now, let's not be feisty.
Edited by BoomerSooner, Mar 26 2014, 08:04 AM.
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Canadianwildlife
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Dinopithecus
Mar 26 2014, 08:02 AM
What did I just read?

He was addressing ARACHNIDKID, since the latter has merely brought up the fact that you've had your say. Spinosaurus rex was not the one who brought you into this again if you look at spinosaurus rex addressing him.

What I find especially hilarious is the fact that you accuse him of being a "Spino fan".
Like him I meant no harm. This wasn't my business, yes, but let me clear this up. Someone, I can't remember who, corrected me on the venomous bite topic, and I acknowledged it. Maybe I didn't say I did, but I did acknowledge it. I stand corrected. And you don't have to get so snappy as to say, what did I just read because this is no big deal. You didn't even have to get involved.
Edited by Canadianwildlife, Mar 26 2014, 08:10 AM.
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spinosaurus rex
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yet you retained to be snappy and acused me being a fanboy. he defended my behalf and i appriciate it. what i posted i true things that you have done and you can't deny. making the point that you are not the most well informed member on this subject. and the post wasn't even pointed torwards you. i see no reason for YOU to get involved
Edited by spinosaurus rex, Mar 26 2014, 08:24 AM.
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