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| Tyrannosaurus rex v Ankylosaurus magniventris | |
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| Tweet Topic Started: Jan 28 2012, 10:08 PM (48,658 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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| blaze | Jun 3 2013, 09:37 AM Post #136 |
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Carnivore
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Given how much of it hasn't been found yet I'm afraid the answer is, we don't know but Euoplocephalus had a lateral range of motion of 100° Figure 10. Diagram showing the approximate right lateroflexion of the tail in Euoplocephalus, and the definition of the half angle of articulation θ. Regarding the accuracy of Paul's Ankylosaurus... ![]() I wasn't expecting this... the dorsals, based on the scalebars are a bit bigger than what Paul depitcs but the cervicals are much smaller... the caudal on the other hand is pretty much perfect, with the only difference is that Paul restored the missing part of the chevron. I think the cervicals will fit in Carpenter's version but the dorsals and the caudals? forget it, the scalebars are probably to blame but I still lean on Paul's being more accurate, despite Carpenter being the "go to" man for Ankylosaurs. Edited by blaze, Jun 3 2013, 11:02 AM.
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| MysteryMeat | Jun 3 2013, 02:23 PM Post #137 |
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Herbivore
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blaze do you have published measurements on those vertebra? |
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| blaze | Jun 3 2013, 03:30 PM Post #138 |
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Carnivore
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This is all I got, from Brown (1908), it seems the last cervical is indeed that small. Length of centrum anteroposteriorly 7th? cervical 70mm 17th? dorsal 130mm 9th? caudal 60mm Width of centrum, posterior end 7th? cervical 120mm 17th? dorsal 125mm 9th? caudal 120mm Height of centrum and spine 7th? cervical 250mm 17th? dorsal 295mm 9th ? caudal 280mm |
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| theropod | Jun 5 2013, 01:44 AM Post #139 |
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palaeontology, open source and survival enthusiast
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Why is the humerus so much more robust in Paul's skeletal? Are the bones he shows all the ones that we know? If so, is it really likely the tail was that short compared to the body? |
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| blaze | Jun 5 2013, 02:03 AM Post #140 |
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Carnivore
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Carpenter has the humerus in complete latera view while Paul shows it a bit mmm turned (?), I don't know if the tail can be longer, Euoplocephalus seems to have a proportionally longer tail so maybe it could but I'm not sure and yes that's pretty much all we have of it, there's only like 4 specimens. |
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| theropod | Jun 5 2013, 02:12 AM Post #141 |
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palaeontology, open source and survival enthusiast
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Then that's one laterally extremely wide but anterocaudally very thin humerus. Then I would say a slightly longer tail would be better. A lenght approaching 8m is possible apparently. It would be at a size disadvantage, but have sufficient reach and power to break the theropods leg bones. |
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| retic | Jun 23 2013, 10:29 AM Post #142 |
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snake and dinosaur enthusiast
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tyrannosaurus wins. it has a huge size advantage but at parity ankylosaurus wins. |
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| thesporerex | Jul 18 2013, 06:23 AM Post #143 |
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Kleptoparasite
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well since the 9 metre ankylosaurus does not exist anymore I would go with t-rex 90% of the time but a 9 metre ankylosaurus would win 75-80% of the time. also to clear up "can t-rex's bite break ankylosaurus's armour" question. the anwser is yes it can crush its armour fairly easily with its bite reaching 9 tons at max. |
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| Godzillasaurus | Jul 18 2013, 07:26 AM Post #144 |
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Reptile King
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Tyrannosaurus actually had a bite force closer to 13,500 pounds per square inch, which translates to a little more than 6 tons. Tyrannosaurus still had a very powerful bite and heavily-built skull structure nonetheless. |
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| Ausar | Jul 18 2013, 07:30 AM Post #145 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Well, the 9 meter figure may be debunked, but there are some in this thread arguing Ankylosaurus may have reached 7 meters (I think probably even 8). The youngest size scale in this thread shows that Ankylosaurus is in a perfect position to reduce T.rex's leg bones to dust. I think Ankylosaurus has an edge in this matchup, despite a weight discrepancy. |
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| Teratophoneus | Jul 18 2013, 07:32 AM Post #146 |
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Herbivore
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The bite force of Tyrannosaurus is estimated up to ~ 5700 newton or ~ 5.7 tons. |
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| Arovinrac | May 31 2014, 08:23 PM Post #147 |
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Herbivore
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Those are not reliable sources |
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| Ausar | May 31 2014, 08:56 PM Post #148 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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From what I remember of the latest size comp., Ankylosaurus was in the perfect position to strike at the legs of the theropod, even though it was significantly lighter than its opponent.
Edited by Ausar, May 31 2014, 11:26 PM.
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| vegetarian | May 31 2014, 09:13 PM Post #149 |
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Herbivore
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to walking with dinosaurs Ankylosaurus kill a Tyrannosaurus |
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| Arovinrac | May 31 2014, 11:25 PM Post #150 |
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Herbivore
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Thats not reliable |
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