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Spinosaurus aegyptiacus v Tyrannosaurus rex
Topic Started: Jan 7 2012, 02:16 AM (459,283 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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Fragillimus335
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I vow to live to see the day when Spinosaurus actually wins a T. rex vs Spinosaurus thread!!!
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mega t.rex the magnificent
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What I notice of tyrannosaurus is its bulky body.
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SpinoInWonderland
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mega t.rex the magnificent
Jan 16 2013, 01:53 PM
What I notice of tyrannosaurus is its bulky body.
Yes, but spinosaurids are also bulky

Here is Suchomimus, a relative of Spinosaurus, and one of the most complete spinosaurids:


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bone crusher
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Sucho may be slightly bulkier than Allosaurus but it's still embarrassingly slender compared to a T rex. And don't even start on that stick thin neck, it's obviously not built for a frontal heavy collision.
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mega t.rex the magnificent
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interesting. Spinosaurids are known for their large arms and spines. Here are some recorded facts of the three largest theropods.

Largest hands- Therizinosaurus.
Largest arms- Spinosaurus.
Longest skull- Giganotosaurus.
Biggest teeth- Tyrannosaurus.
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bone crusher
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mega t.rex the magnificent
Jan 16 2013, 02:02 PM
interesting. Spinosaurids are known for their large arms and spines. Here are some recorded facts of the three largest theropods.

Largest hands- Therizinosaurus.
Largest arms- Spinosaurus.
Longest skull- Giganotosaurus.
Biggest teeth- Tyrannosaurus.
Spinosaurus may also have the longest skull now since Giganotosaurus has a much shorter skull from a more updated Scott Hartman drawing. But in terms of volume and cubic dimension, T Rex still has the biggest, widest and heaviest skull of them all. And also the bulkiest neck.
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mega t.rex the magnificent
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Correct. That's why tyrannosaurus has tiny arms to balance the head
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theropod
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Asaurus
Jan 16 2013, 05:44 AM
mega t.rex the magnificent
Jan 16 2013, 02:36 AM
Godzillaman
Jan 15 2013, 11:44 PM
mega t.rex the magnificent
Jan 15 2013, 04:20 PM
Well anyway back on topic, I favor tyrannosaurus
Why though? I used to favor tyrannosaurus in this fight, but I was proven wrong when I heard of sources that indicate a spinsaurus bite force of 2-3 tons. Tyrannosaurus may be very heavily-built, but given the size of its opponent, it will be a very painstaking fight.
Isn't tyrannosaurus s bite force up to 13000 pofpsi
That's the maximum. The minimum T.rex bite force was 7,000 lbs.
Minimum might be the wrong expression, those where not yielded by different metods, but one is the force it could apply at the posterior teeth and the other one at the anterior ones.
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Godzillasaurus
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mega t.rex the magnificent
Jan 16 2013, 02:38 PM
Correct. That's why tyrannosaurus has tiny arms to balance the head
The small arms are mainly due to the fact that tyrannosaurus used its jaws the majority of the time when hunting.
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SpinoInWonderland
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mega t.rex the magnificent
Jan 16 2013, 02:38 PM
Correct. That's why tyrannosaurus has tiny arms to balance the head
Actually, the tail, not the arms, balances the head
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mega t.rex the magnificent
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brolyeuphyfusion
Jan 16 2013, 11:36 PM
mega t.rex the magnificent
Jan 16 2013, 02:38 PM
Correct. That's why tyrannosaurus has tiny arms to balance the head
Actually, the tail, not the arms, balances the head
But little arms help balance as well. If tyrannosaurus had large king Kong arms, he would eventually fall forward everytime he makes a step. Large arms would put too much weight on the cranial area.
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theropod
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that's partially true, however even in large armed theropods the arms don really constitute a large part of their weight. Of course, in allosaurus the arms are much heavier when compared to the skull than in tyrannosaurus, both due to larger arms and a mroe lightly built skull, but I doubt large arms would result in T. rex toppling over, if that was the case what would feeding cause it to do, turn a cartwheel?
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Godzillasaurus
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mega t.rex the magnificent
Jan 17 2013, 02:31 AM
brolyeuphyfusion
Jan 16 2013, 11:36 PM
mega t.rex the magnificent
Jan 16 2013, 02:38 PM
Correct. That's why tyrannosaurus has tiny arms to balance the head
Actually, the tail, not the arms, balances the head
But little arms help balance as well. If tyrannosaurus had large king Kong arms, he would eventually fall forward everytime he makes a step. Large arms would put too much weight on the cranial area.
But what relevance does the size of the arms of tyrannosaurus have in this match up? Unlike dinosaurs such as allosaurus, they weren't as useful as weapons or grappling tools.
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Ausar
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Godzillaman
Jan 17 2013, 08:13 AM
mega t.rex the magnificent
Jan 17 2013, 02:31 AM
brolyeuphyfusion
Jan 16 2013, 11:36 PM
mega t.rex the magnificent
Jan 16 2013, 02:38 PM
Correct. That's why tyrannosaurus has tiny arms to balance the head
Actually, the tail, not the arms, balances the head
But little arms help balance as well. If tyrannosaurus had large king Kong arms, he would eventually fall forward everytime he makes a step. Large arms would put too much weight on the cranial area.
But what relevance does the size of the arms of tyrannosaurus have in this match up? Unlike dinosaurs such as allosaurus, they weren't as useful as weapons or grappling tools.
If T.rex was close enough, it might be able to grab Spino with its arms and grasp on. And, contrary to popular belief, those arms were far from weak, both arms were shown to be able to lift 400 lbs.
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Fragillimus335
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And Spinosaurus could probably lift 3-4 times that.
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