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Tyrannosaurus rex v Ankylosaurus magniventris
Topic Started: Jan 28 2012, 10:08 PM (48,664 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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Prehistoric Cat
 
Tyrannosaurus VS Ankylosaurus
Edited by Taipan, May 25 2018, 11:58 PM.
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TerrorBird
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Taurus
Feb 5 2012, 06:51 AM
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.
Of course there wouldn't be any direct hard-evidence of false eye-spots on the tail-club because color-patterns are usually never preserved in the fossil record. //// I know there are no sauropods in T-rex's range but this forum is raising a hypothetical battle between T-rex and anklyosaurus, so that's the only reason why I'm talking about the defense-strategy of anklyosaurus.
Edited by TerrorBird, Feb 7 2012, 05:50 AM.
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TerrorBird
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Anomonyous
Feb 5 2012, 12:23 PM
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.

Well, that's the pros & cons of evolution being that animals at first, develop a certain defense strategy or camoflage but then in time, the predators no longer become fooled by it, then evolution develops an altogether different defense-mechanism in the future generations of those animals.
Edited by TerrorBird, Feb 7 2012, 10:44 AM.
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Taipan
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Godzillaman
 
Ankylosaurus vs Carcharodontosaurus


Try this one first.
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Jinfengopteryx
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Prehistoric Cat
Jan 28 2012, 10:17 PM
Tyrannosaurus Rex wins IMO
It has a size advantage + Powerful Bite
I think Tyrannosaurus was agile enough to avoid that tail of Ankylosaurus.
Well, if it tries to come close to the Ancylo, it will get hitten by the club. This would break it's hollow bones, also prey usually wins against the predator, but Ancylosaurus can't runaway, so it's kind of winning, must be different.
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Jinfengopteryx
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SameerPrehistorica
Jan 28 2012, 10:52 PM
Tyrannosaurus - 75 % win / Ankylosaurus - 25 % win
Could you give any reasons for that claim, cause it seems very unlikely!!!
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Megafelis Fatalis
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Tyrannosaurus based on the 1.5m long skull, Ankylosaurus based on the largest skull (~65cm long)
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Neofelis
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I thought Anky was bigger but oh we'll. I vote trex 6/10 due to size advantage but that club could still hurt it and make it fall which would be fatal.
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Jinfengopteryx
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Prehistoric Cat
Jul 31 2012, 11:57 PM
Tyrannosaurus based on the 1.5m long skull, Ankylosaurus based on the largest skull (~65cm long)
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I ment for your claim that T-rex would mostly win, the scale is accurate.
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Cat
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Jul 31 2012, 11:57 PM
Tyrannosaurus based on the 1.5m long skull, Ankylosaurus based on the largest skull (~65cm long)
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If that size comparison is really accurate then I would lean towards T-rex, but there is no doubt that the tail club would still have been very dangerous for the predator.
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Jinfengopteryx
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It is accurate, but still, T-rex would've a ard job avoiding the club.
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Megafelis Fatalis
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Aug 1 2012, 02:27 AM
Prehistoric Cat
Jul 31 2012, 11:57 PM
Tyrannosaurus based on the 1.5m long skull, Ankylosaurus based on the largest skull (~65cm long)
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If that size comparison is really accurate then I would lean towards T-rex, but there is no doubt that the tail club would still have been very dangerous for the predator.
Notice that the Tail is very short to be dangerous to Tyrannosaurus, and don't forget that Ankylosaurus had short legs, wide body and armor, which made it very very very slow
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Jinfengopteryx
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Prehistoric Cat
Aug 2 2012, 07:31 AM
Cat
Aug 1 2012, 02:27 AM
Prehistoric Cat
Jul 31 2012, 11:57 PM
Tyrannosaurus based on the 1.5m long skull, Ankylosaurus based on the largest skull (~65cm long)
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If that size comparison is really accurate then I would lean towards T-rex, but there is no doubt that the tail club would still have been very dangerous for the predator.
Notice that the Tail is very short to be dangerous to Tyrannosaurus, and don't forget that Ankylosaurus had short legs, wide body and armor, which made it very very very slow
Well, rhinos and hippos also can turn fast, even if their legs are short. The tail should be long enough to hit a leg
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7Alx
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Jinfengopteryx
Aug 2 2012, 05:52 PM
Well, rhinos and hippos also can turn fast, even if their legs are short. The tail should be long enough to hit a leg
But rhino and hippo don't have armor unlike to Ankylosaurus.
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Jinfengopteryx
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Still, even elephants can move fast and they're heavier than Ancylosaurus.
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7Alx
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6 ton Ankylosaurus is weight of average Elephant. But Ankylosaurus is twice as short at height due short legs. If they are in equal height, anky would be much heavier. There is not possible that Ankylosaurus could run 40 km/h (Elephant's top speed).
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