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Tyrannosaurus rex v Ankylosaurus magniventris
Topic Started: Jan 28 2012, 10:08 PM (48,660 Views)
Taipan
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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. 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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Ankylosaurus magniventris
Ankylosaurus is a genus of ankylosaurid dinosaur, containing one species, A. magniventris. Fossils of Ankylosaurus are found in geologic formations dating to the very end of the Cretaceous Period (about 66.5–65.5 Ma ago) in western North America. Although a complete skeleton has not been discovered and several other dinosaurs are represented by more extensive fossil material, Ankylosaurus is often considered the archetypal armored dinosaur. Other ankylosaurids shared its well-known features—the heavily-armored body and massive bony tail club—but Ankylosaurus was the largest known member of the family. In comparison with modern land animals the adult Ankylosaurus was very large. Some scientists have estimated a length of 9 meters (30 ft). Another reconstruction suggests a significantly smaller size, at 6.25 m (20.5 ft) long, up to 1.5 m (5 ft) wide and about 1.7 m (5.5 ft) high at the hip. Ankylosaurus may have weighed over 6,000 kilograms (13,000 lb), making it one of the heaviest armored dinosaurs yet discovered. The body shape was low-slung and quite wide. It was quadrupedal, with the hind limbs longer than the forelimbs. Although its feet are still unknown, comparisons with other ankylosaurids suggest Ankylosaurus probably had five toes on each foot. The skull was low and triangular in shape, wider than it was long. The largest known skull measures 64.5 centimeters (25 in) long and 74.5 cm (29 in) wide.

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Tyrannosaurus VS Ankylosaurus
Edited by Taipan, May 25 2018, 11:58 PM.
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blaze
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Tyrant
Feb 10 2013, 03:17 AM
I think I would favor over tyrannosaur over an ankylosaur even at parity because of this tidbit of info.

Quote:
 
These herbivores were up to ten meters long, with a tail ending in a huge bony club - 'probably used as a weapon', says Torsten Scheyer, 'even though they definitely could not simply swing it back and forth; the whole construction was simply too stiff for that.'


http://carnivoraforum.com/topic/9806084/1/#new Go to broly's 2nd post.

If I read that correctly and the information proves to be accurate ankylosaurus's club tail was far less effective than it has been portrayed, coupled with the fact that the ankylosaur would be incredibly ungainly and probably have low stamina and I think a cautious tyrannosaur would prevail over the club tailed dinosaur more often than not at similar sizes.

For this match up however tyrannosaurus destroys ankylosaurus because of the huge size disparity.
That article is from 2004 and is contradicted by Arbour (2009) Estimating Impact Forces of Tail Club Strikes by Ankylosaurid Dinosaurs

From the abstract
Quote:
 
Free caudal vertebrae segments had limited vertical flexibility, but the tail could have swung through approximately 100° laterally. Muscle scars on the pelvis record the presence of a large M. longissimus caudae, and ossified tendons alongside the handle represent M. spinalis. CT scans showed that knob osteoderms were predominantly cancellous, which would have lowered the rotational inertia of the tail club and made it easier to wield as a weapon. Conclusions/Significance: Large knobs could generate sufficient force to break bone during impacts, but average and small knobs could not. Tail swinging behaviour is feasible in ankylosaurids, but it remains unknown whether the tail was used for interspecific defense, intraspecific combat, or both.
The "handle" of tail club does seem to be very stiff though but that's only half of the length of the tail.

The tail club of the specimen AMNH 5245 of Euoplocephalus is estimated to deliver an impact force of 7,281–14,360N, and an impact stress of 36,400–71,810 N/cm2, around 3 to 7 times the force needed to break bone, it'll be expected that the blow of Ankylosaurus will be much stronger.
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DarkGricer
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A 6 meter Anky wouldn't stand much of a chance, though a 9 meter one would probably win.

At 6 meters: T.rex wins 90% of the time
At 9 metes: Ankylosaurus wins 65% of the time.
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Spinodontosaurus
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What 9 meter goliath are you referring too?
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Jinfengopteryx
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He has made some estimates by himself. Some were much larger than 6 m.
Or he was hypothethically speaking, as long time, Ankylosaurus was claimed to be 9 m long.
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Big G
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Ankylosaurus=9 m
T-Rex=12 m

My choose= Let's say that, even if the T-Rex was bigger, would hardly exceeded that armor. I think the Ankylosaurus would win.
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theropod
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The problem is, ankylosaurus probably wasn't 9m...
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Big G
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theropod
Mar 23 2013, 02:45 AM
The problem is, ankylosaurus probably wasn't 9m...
Oh, sorry, the problem is that they are up to date on new estimates.

Then I would say 50/50, because the T-Rex had a much bigger, but Ankylosaurus was the armor.
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SpinoInWonderland
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MrGiganotosaurus
Mar 23 2013, 02:49 AM
theropod
Mar 23 2013, 02:45 AM
The problem is, ankylosaurus probably wasn't 9m...
Oh, sorry, the problem is that they are up to date on new estimates.

Then I would say 50/50, because the T-Rex had a much bigger, but Ankylosaurus was the armor.
Sure, the armor is very strong, but what's underneath the armor, the same cannot be said for that. Tyrannnosaurus can step on the Ankylosaurus and press down on it...
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brolyeuphyfusion
Mar 23 2013, 02:55 AM
MrGiganotosaurus
Mar 23 2013, 02:49 AM
theropod
Mar 23 2013, 02:45 AM
The problem is, ankylosaurus probably wasn't 9m...
Oh, sorry, the problem is that they are up to date on new estimates.

Then I would say 50/50, because the T-Rex had a much bigger, but Ankylosaurus was the armor.
Sure, the armor is very strong, but what's underneath the armor, the same cannot be said for that. Tyrannnosaurus can step on the Ankylosaurus and press down on it...
Anky would shatter the leg bone if t rex can near it.
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DarkGricer
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Nate
Apr 4 2013, 07:00 AM
brolyeuphyfusion
Mar 23 2013, 02:55 AM
MrGiganotosaurus
Mar 23 2013, 02:49 AM
theropod
Mar 23 2013, 02:45 AM
The problem is, ankylosaurus probably wasn't 9m...
Oh, sorry, the problem is that they are up to date on new estimates.

Then I would say 50/50, because the T-Rex had a much bigger, but Ankylosaurus was the armor.
Sure, the armor is very strong, but what's underneath the armor, the same cannot be said for that. Tyrannnosaurus can step on the Ankylosaurus and press down on it...
Anky would shatter the leg bone if t rex can near it.
Except that a 6 meter Anky probably didn't have the muscle to break said leg bone.
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blaze
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Read my post in the previous page, the size of the animal is not the most important thing but the size of the club, that of Euoplocephalus has been estimated to be able to strike with a force between 3 to 7 times the necessary to break bone and the club of a 6m Ankylosaurus is at least as big if not bigger.
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Monitor X
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These guys are so idiots, if Ankylosaurus was not evolved to perform efficient defense against giants predators, how the hell it woud have been able to evolve ?

Except for the armor and the club, it had nothing, of course this was a powerful and dangerouse defense for any predator, even for Tyrannosaurus which was basically the anti-tank specialized giant theropod.
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DinosaurMichael
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Monitor X
Apr 4 2013, 07:08 PM
These guys are so idiots, if Ankylosaurus was not evolved to perform efficient defense against giants predators, how the hell it woud have been able to evolve ?

Except for the armor and the club, it had nothing, of course this was a powerful and dangerouse defense for any predator, even for Tyrannosaurus which was basically the anti-tank specialized giant theropod.
Believe me. That's what I keep telling someone like Prehistoric Cat/Megafelis Fatalis, yet it seems he ignores everything I say about Ankylosaurus. rolleyes
Edited by DinosaurMichael, Apr 4 2013, 08:53 PM.
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SpinoInWonderland
The madness has come back...
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Monitor X
Apr 4 2013, 07:08 PM
These guys are so idiots, if Ankylosaurus was not evolved to perform efficient defense against giants predators, how the hell it woud have been able to evolve ?
It had an effective defense, but that doesn't mean that it would easily repel titanic 6+ tonne theropods easily.

Remember that Tyrannosaurus wasn't the only N. American Late Cretaceous predator around. There were smaller ones, many of which are undiscovered as the discovered taxa are very likely only a small part of what actually lived in the Mesozoic.
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SpinoInWonderland
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I still believe that Tyrannosaurus wins this, although Ankylosaurus has a chance if it gets to hit the legs...
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