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| Tyrannosaurus rex v Ankylosaurus magniventris | |
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| Tweet Topic Started: Jan 28 2012, 10:08 PM (48,663 Views) | |
| Taipan | Jan 28 2012, 10:08 PM Post #1 |
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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. ![]() 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. ![]() ______________________________________________________________________________
Edited by Taipan, May 25 2018, 11:58 PM.
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| TerrorBird | Aug 5 2012, 03:30 AM Post #61 |
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Autotrophic Organism
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I agree with you. Also keep in mind that there are valid published reports that say there were color patterns on the ankly so that it had one dot on each side of the tail-club, which made it resemble the eyes on the head of the ankly. This is called "mimicing", so that Tyranny would bite at the tail-club but gain nothing from the bite. So, there was no such thing that ankly was ever facing the wrong way when Tyranny approached. Edited by TerrorBird, Aug 5 2012, 03:43 PM.
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| Godzillasaurus | Aug 5 2012, 03:39 AM Post #62 |
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Reptile King
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Tyrannosaurus and ankylosaurus were almost like mortal enemies during the Late Cretaceous. That is why ankylosaurus evolved ways of defending itself such as a club-like tail and tough armor. I think it could go both ways. |
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| Jinfengopteryx | Aug 5 2012, 04:01 AM Post #63 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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As I said, well armed prey mostly wins against the predator. Tyrannosaurus would in most cases try to avoid the Ancylosaurus. |
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| Godzillasaurus | Aug 5 2012, 05:06 AM Post #64 |
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Reptile King
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But remember, tyrannosaurs were very well adapted for taking down animals like ankylosaurs. |
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| Jinfengopteryx | Aug 5 2012, 05:56 AM Post #65 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Still, I think it rather attacked Hadrosaurs. |
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| Fishfreak | Aug 5 2012, 12:20 PM Post #66 |
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Friend of the fish
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But this was probably by ambushing never head on, that would be too risky. |
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| linnaeus1758 | Aug 7 2012, 11:48 AM Post #67 |
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Omnivore
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But tyranno is huge next to the ankylosaurus! |
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| Carcharadon | Aug 7 2012, 12:18 PM Post #68 |
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Shark Toothed Reptile
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I think 50/50 T.rex can win by biting Anky in the leg and lift it over and attack the underside Anky can win by breaking T.rex's leg with its bone crushing tail club |
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| Megafelis Fatalis | Aug 7 2012, 08:09 PM Post #69 |
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Carnivore
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But they don't have armor, and they don't have a very wide body. (Ankylosaurus skull was 65cm long and 74cm wide!!) |
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| Fragillimus335 | Aug 26 2012, 02:41 AM Post #70 |
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Omnivore
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Ankylosaurus is much smaller than commonly portrayed. It was actually about 6.5 meters long and 3 tons. Tyrannosaurus could easily overpower it. |
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| SpinoInWonderland | Aug 26 2012, 03:31 AM Post #71 |
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The madness has come back...
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Nuff said... Also, Walking With Dinosaurs states that Ankylosaurus had a mass of 7 tonnes iirc, making it larger than Tyrannosaurus |
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| DinosaurMichael | Aug 26 2012, 03:32 AM Post #72 |
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Apex Predator
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I'd say 5-6 tons would've been more likely. |
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| Carcharadon | Aug 26 2012, 03:32 AM Post #73 |
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Shark Toothed Reptile
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7 tonnes would be probable the same size as Tyrannosaurus rather than bigger Edited by Carcharadon, Aug 26 2012, 03:32 AM.
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| 7Alx | Aug 26 2012, 04:57 AM Post #74 |
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Herbivore
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WWD's Ankylosaurus is oversized, although not that oversized like Liopleurodon. |
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| Jinfengopteryx | Aug 26 2012, 05:28 AM Post #75 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Well, that 7t figure is a bit exaggerated, 6,1t are more likely imo. |
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