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Tyrannosaurus rex v Ankylosaurus magniventris
Topic Started: Jan 28 2012, 10:08 PM (48,665 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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Apex
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well sue happens to be the biggest
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Taurus
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DarkGricer
Feb 2 2012, 04:41 AM
apexpredator7
Feb 2 2012, 04:38 AM
well sue happens to be the biggest
Yeah! And Anky even ****d HER up!
Or Sue has killed the Ankylo after the ankylo smashed her leg. And Sue survived! The real issue with Ankylo is the size, it is much smaller than an average Trex.
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Anomonyous
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tigerkid
Jan 29 2012, 07:36 AM
Tyrannosaurus would NOT beat this beast easily. See t.rex is getting overrated again. Ankylo is a walking tank. I know t.rex had a strong bite but do you really expect him to bite through that armour? And even if he could do you think ankylosaurus will let t.rex happily bite through his armour when he has a club at the end of his tail? And the only soft spot on the ankylo is his belly and t.rex certainly couldn't flip ankylo with those arms. So all in all ankylo would win 8/10
Seeing that some studies suggest tyrannnosaurus had a f*cking 25 ton bite force, crushing the skull would have been no huge deal.

That said I think ankylosaurus has the advantage in this fight.

P.S. If you don't mind me asking, how old are you?
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Anomonyous
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Mack
Jan 30 2012, 12:49 AM
I think both Ankylosaurus and T.rex are very highly, inflated overrated. Based on the size-comparision T.rex should have the edge, but in reality the bones of many large Tyrannosaurs showed al-mighty blows to their leg-bones and this might had very well be due to the tail-club of an ankylosaurus. Theropod lower leg bones, shinebones are also quite so thin and evidently the club-tail of ankylosaurus was mostly hitted there (sekvence 0:33- 2:00)


I accually belive a smaller more agile predator with better mobility and intelligence would had been better at dealing with ankylosaurus then larger, less agile predators, with little mobilty and lower intelligence.
Dromaeosaurids were no more intelligent than tyrannosaurs. That reputation mainly stems from JP hype.
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TerrorBird
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I see nobody mentioned a particular key defense-mechanism belonging to anklyosaurus. That is, scientists say that a simple color pattern of 2 large round spots appear on the tail-club, deliberately making these spots look like 2 big eyes on the tail-club which then translates into the predator thinking that this is the head of anklyosaurus. This, in turn, would then also make the stem of the tail appear as the neck of the animal. Hence, all this means that predators such as tyrannosaurus initially lunged and bit at the tail because their instincts told them that once the "neck" is snapped, then the victim dies. This key evolutionary strategy would have helped anklyosaurus survive through the ages. Hence, I'm voting for anklyosaurus in surviving through a death-match between these 2 animals.
Edited by TerrorBird, Feb 4 2012, 03:13 PM.
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Anomonyous
Feb 2 2012, 02:22 PM
tigerkid
Jan 29 2012, 07:36 AM
Tyrannosaurus would NOT beat this beast easily. See t.rex is getting overrated again. Ankylo is a walking tank. I know t.rex had a strong bite but do you really expect him to bite through that armour? And even if he could do you think ankylosaurus will let t.rex happily bite through his armour when he has a club at the end of his tail? And the only soft spot on the ankylo is his belly and t.rex certainly couldn't flip ankylo with those arms. So all in all ankylo would win 8/10
Seeing that some studies suggest tyrannnosaurus had a f*cking 25 ton bite force, crushing the skull would have been no huge deal.

That said I think ankylosaurus has the advantage in this fight.

P.S. If you don't mind me asking, how old are you?
Holy..... 25tons ok if that was real it would destroy ankylosaurus but that's probably not going to be real because if it was t.rex would destroy everything. I don't mind you asking I'm very young 8
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Superpredator
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And I see no one has answered my question of how a size advantage would help T.rex
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Anomonyous
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TerrorBird
Feb 4 2012, 02:52 PM
I see nobody mentioned a particular key defense-mechanism belonging to anklyosaurus. That is, scientists say that a simple color pattern of 2 large round spots appear on the tail-club, deliberately making these spots look like 2 big eyes on the tail-club which then translates into the predator thinking that this is the head of anklyosaurus. This, in turn, would then also make the stem of the tail appear as the neck of the animal. Hence, all this means that predators such as tyrannosaurus initially lunged and bit at the tail because their instincts told them that once the "neck" is snapped, then the victim dies. This key evolutionary strategy would have helped anklyosaurus survive through the ages. Hence, I'm voting for anklyosaurus in surviving through a death-match between these 2 animals.
I would doubt this; tyrannosaurus isn't an Einstein but it's not Rick Perry either. A young tyrannosaurus might fall for it but we're talking about a full-grown one here.
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Anomonyous
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tigerkid
Feb 4 2012, 04:03 PM
And I see no one has answered my question of how a size advantage would help T.rex
Tyrannosaurus possesses a height advantage, making it easier to duck down and bite at ankylosaurus' vulnerable spots.
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Anomonyous
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tigerkid
Feb 4 2012, 04:00 PM
Holy..... 25tons ok if that was real it would destroy ankylosaurus but that's probably not going to be real because if it was t.rex would destroy everything. I don't mind you asking I'm very young 8
http://www.livescience.com/1557-rex-secret-weapon-discovered.html

Study here.

That's likely an overestimate but a 13 ton bite wouldn't be impossible, I'd think.
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Scar
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Since when was Ankylosaurus under eighteen feet in length? Last I checked the estimates were between twenty and thirty feet. That chart is *way* off.
Edited by Scar, Feb 5 2012, 05:32 AM.
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Scar
Feb 5 2012, 05:30 AM
Since when was Ankylosaurus under eighteen feet in length? Last I checked the estimates were between twenty and thirty feet. That chart is *way* off.
The size comparison is based on the Ankylosaurus largest skull until now.

''The largest known skull measures 64.5 centimeters (25 in) long and 74.5 cm (29 in) wide''

http://en.wikipedia.org/wiki/Ankylosaurus#Paleobiology

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TerrorBird
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Anomonyous
Feb 5 2012, 03:38 AM
TerrorBird
Feb 4 2012, 02:52 PM
I see nobody mentioned a particular key defense-mechanism belonging to anklyosaurus. That is, scientists say that a simple color pattern of 2 large round spots appear on the tail-club, deliberately making these spots look like 2 big eyes on the tail-club which then translates into the predator thinking that this is the head of anklyosaurus. This, in turn, would then also make the stem of the tail appear as the neck of the animal. Hence, all this means that predators such as tyrannosaurus initially lunged and bit at the tail because their instincts told them that once the "neck" is snapped, then the victim dies. This key evolutionary strategy would have helped anklyosaurus survive through the ages. Hence, I'm voting for anklyosaurus in surviving through a death-match between these 2 animals.
I would doubt this; tyrannosaurus isn't an Einstein but it's not Rick Perry either. A young tyrannosaurus might fall for it but we're talking about a full-grown one here.
Even in today's animal kingdom, we see this same very defense-mechanism, and it's called mimicry whereas animals mimic the eyes. For instance, the Caligo butterfly's wings exhibit 1 big "dot" on each wing that mimics the eyes of an owl so that owls become fooled by it (see "Owl-butterfly" in Wikipedia). The mimicry of the anklyosaurus would show the 2 round spots on its tail-club to mimic eyes, but an important 2nd defense-mechanism is the long tail that the club is attached to. This long tail would mimic the long-necked dinosaurs (such as Diplocodus) during that time, which also tells me that long-necked herbivore-dinosaurs were an easy target for carnivores because they need only to break the neck. But in anklyosaurus' situation, as soon as its tail is targeted & attacked, it then uses its sweeping motion of the tail-club to injure the legs of the carnivore. If am listing here the particular reference for what I am talking about here: Thulborn, Tony. 1994. Mimicry in ankylosaurid dinosaurs. Records of the
South Australian Museum 27(2):151-158.


Edited by TerrorBird, Feb 6 2012, 05:30 AM.
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Taurus
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TerrorBird
Feb 5 2012, 06:40 AM
Anomonyous
Feb 5 2012, 03:38 AM
TerrorBird
Feb 4 2012, 02:52 PM
I see nobody mentioned a particular key defense-mechanism belonging to anklyosaurus. That is, scientists say that a simple color pattern of 2 large round spots appear on the tail-club, deliberately making these spots look like 2 big eyes on the tail-club which then translates into the predator thinking that this is the head of anklyosaurus. This, in turn, would then also make the stem of the tail appear as the neck of the animal. Hence, all this means that predators such as tyrannosaurus initially lunged and bit at the tail because their instincts told them that once the "neck" is snapped, then the victim dies. This key evolutionary strategy would have helped anklyosaurus survive through the ages. Hence, I'm voting for anklyosaurus in surviving through a death-match between these 2 animals.
I would doubt this; tyrannosaurus isn't an Einstein but it's not Rick Perry either. A young tyrannosaurus might fall for it but we're talking about a full-grown one here.
Even in today's animal kingdom, we see this same very defense-mechanism, and it's called mimicry whereas animals mimic the eyes. For instance, the Caligo butterfly's wings exhibit 1 big "dot" on each wing that mimics the eyes of an owl so that owls become fooled by it (see "Owl-butterfly" in Wikipedia). The mimicry of the anklyosaurus would show the 2 round spots on its tail-club to mimic eyes, but an important 2nd defense-mechanism is the long tail that the club is attached to. This long tail would mimic the long-necked dinosaurs (such as Diplocodus) during that time, which also tells me that long-necked herbivore-dinosaurs were an easy target for carnivores because they need only to break the neck. But in anklyosaurus' situation, as soon as its tail is targeted & attacked, it then uses its sweeping motion of the tail-club to injure the legs of the carnivore.
There's no evidence of Ankylosaurus has false eye spots. Also you have a problem with this theory: there's no sauropods in most Trex's range beside Alamosaurus which are in small part of southern range of Trex.
Edited by Taurus, Feb 5 2012, 06:53 AM.
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Anomonyous
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TerrorBird
Feb 5 2012, 06:40 AM
Even in today's animal kingdom, we see this same very defense-mechanism, and it's called mimicry whereas animals mimic the eyes. For instance, the Caligo butterfly's wings exhibit 1 big "dot" on each wing that mimics the eyes of an owl so that owls become fooled by it (see "Owl-butterfly" in Wikipedia). The mimicry of the anklyosaurus would show the 2 round spots on its tail-club to mimic eyes, but an important 2nd defense-mechanism is the long tail that the club is attached to. This long tail would mimic the long-necked dinosaurs (such as Diplocodus) during that time, which also tells me that long-necked herbivore-dinosaurs were an easy target for carnivores because they need only to break the neck. But in anklyosaurus' situation, as soon as its tail is targeted & attacked, it then uses its sweeping motion of the tail-club to injure the legs of the carnivore.
I believe Rebel has already answered that. However, I would like to add in that tyrannosaurus is probably more intelligent than the usual prey of the butterflies. Additionally, if it is fully grown, it's probably seen enough ankylosauruses already to know than the tail isn't the head.

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