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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,153 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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TheViper
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T-Rex definitly one bite would crush the back of Spinosaurus
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thesporerex
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Canadianwildlife
Mar 3 2014, 05:58 PM
This thread will have to run dry sooner or later.
300 pages later...
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spinosaurus rex
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TheViper
Mar 3 2014, 11:01 PM
T-Rex definitly one bite would crush the back of Spinosaurus
come on. we just went through why tyrannosaurus wouldn't be able to bite the back of this creature for multiple reasons.

Edited by spinosaurus rex, Mar 4 2014, 01:09 AM.
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TheMechaBaryonyx789
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TheViper
Mar 3 2014, 11:01 PM
T-Rex definitly one bite would crush the back of Spinosaurus
Spinosaurus is significantly taller so no.
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Hatzegopteryx
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Canadianwildlife
Mar 3 2014, 05:58 PM
Ok guys just another 71 more pages and we will be at 300. How could this thread last this long? I'm not a dinosaur person, I prefer mammals and birds, especially the ones from Canada and Alaska. This thread will have to run dry sooner or later.
I'm not so sure about that, people join everyday and post here.
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Hatzegopteryx
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TheViper
Mar 3 2014, 11:01 PM
T-Rex definitly one bite would crush the back of Spinosaurus
Yet the latter can't do the same? Wow.
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ArachnidKid
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Carnosaur18
Mar 2 2014, 02:46 AM
man, i'm out. you guys just aren't very open to jackshit...so bye.
lol the same reason i lurk the topic instead of posting data, you have 1 unpopular opinion and you're an antichrist rolleyes
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Hatzegopteryx
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ArachnidKid
Mar 4 2014, 03:34 AM
Carnosaur18
Mar 2 2014, 02:46 AM
man, i'm out. you guys just aren't very open to jackshit...so bye.
lol the same reason i lurk the topic instead of posting data, you have 1 unpopular opinion and you're an antichrist rolleyes
Is it so hard for people to understand? It isn't just an opinion, it's a bunch of baseless speculations that have just been debunked. And when they were debunked, he pretty much got offended by being exposed to how non-credible he is.

No-one called him anti-christ - We debunked a bunch of irrelevant and baseless arguments. Why the hell do people find it so offensive?
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Canadianwildlife
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Hatzegopteryx
Mar 4 2014, 02:06 AM
Canadianwildlife
Mar 3 2014, 05:58 PM
Ok guys just another 71 more pages and we will be at 300. How could this thread last this long? I'm not a dinosaur person, I prefer mammals and birds, especially the ones from Canada and Alaska. This thread will have to run dry sooner or later.
I'm not so sure about that, people join everyday and post here.
Yeah thats true.
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Hatzegopteryx
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Canadianwildlife
Mar 4 2014, 04:38 AM
Hatzegopteryx
Mar 4 2014, 02:06 AM
Canadianwildlife
Mar 3 2014, 05:58 PM
Ok guys just another 71 more pages and we will be at 300. How could this thread last this long? I'm not a dinosaur person, I prefer mammals and birds, especially the ones from Canada and Alaska. This thread will have to run dry sooner or later.
I'm not so sure about that, people join everyday and post here.
Yeah thats true.
Yeah, that's why the thread is still active.
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TheViper
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spinosaurus rex
Mar 4 2014, 12:55 AM
TheViper
Mar 3 2014, 11:01 PM
T-Rex definitly one bite would crush the back of Spinosaurus
come on. we just went through why tyrannosaurus wouldn't be able to bite the back of this creature for multiple reasons.

I didn't read.......This is my first day being in this site
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Hatzegopteryx
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TheViper
Mar 4 2014, 05:37 AM
spinosaurus rex
Mar 4 2014, 12:55 AM
TheViper
Mar 3 2014, 11:01 PM
T-Rex definitly one bite would crush the back of Spinosaurus
come on. we just went through why tyrannosaurus wouldn't be able to bite the back of this creature for multiple reasons.

I didn't read.......This is my first day being in this site
Welcome to Carnivora dude :D
Edited by Hatzegopteryx, Mar 4 2014, 05:55 AM.
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spinosaurus rex
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TheViper
Mar 4 2014, 05:37 AM
spinosaurus rex
Mar 4 2014, 12:55 AM
TheViper
Mar 3 2014, 11:01 PM
T-Rex definitly one bite would crush the back of Spinosaurus
come on. we just went through why tyrannosaurus wouldn't be able to bite the back of this creature for multiple reasons.

I didn't read.......This is my first day being in this site
my bad for my rudness. didn't know it was your first day. welcome to the forum
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Hatzegopteryx
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Posted Image
Dorsoventral view of Spinosaurus aegyptiacus' maxilla and premaxilla. Credit goes to Paleofile.
Edited by Hatzegopteryx, Mar 4 2014, 09:33 AM.
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The All-seeing Night
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My knowledge of these animals is pretty basic. Excuse me if I'm not going to read 230 pages of posts.

The t.rex has the much more powerful bite. It has large jaw muscles and massive durable teeth. However it is at a disadvantage when it comes to gape. The larger estimates for spinosaurus weight puts it at significantly larger, but usually its at 1.5 times th t.rex's weight. Its jaw has more gape, but its bite is much weaker. Its narrow, elongated haw has more reach and can bite easier. The tyrannosaur is more robust and I think it should overcome the spinosaurus more times than not.
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