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| Tyrannosaurus rex v Ankylosaurus magniventris | |
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| Tweet Topic Started: Jan 28 2012, 10:08 PM (48,662 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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| Fragillimus335 | Aug 28 2012, 11:46 PM Post #76 |
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Omnivore
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Actually all of these estimates are too high. Ken carpenter recently re-described Anky at 6.25 meters long and 3-4 tons. The old 9 meter, 7 ton estimates were from ancient papers.
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| DinosaurMichael | Aug 28 2012, 11:47 PM Post #77 |
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Apex Predator
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For all we know. 3-4 tons could possibly be it's average, while 6 tons could of been it's max. |
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| Rammus | Sep 15 2012, 08:44 PM Post #78 |
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Autotrophic Organism
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Ankylosaurus wins. Its not going to sit there and let T.Rex bite the crap out of it. And I don't think the T.Rex was that agile. |
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| Verdugo | Sep 16 2012, 12:15 AM Post #79 |
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Large Carnivores Enthusiast
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Hmm, T rex wins with ease. It's just too big Edited by Verdugo, Sep 16 2012, 12:16 AM.
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| Mauro20 | Sep 16 2012, 11:27 PM Post #80 |
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Badass
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In a fight to the death, Tyrannosaurus wins, in my opinion. This would not be easy, anyway. |
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| ordraco | Sep 21 2012, 03:18 AM Post #81 |
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Unicellular Organism
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Ankylosaurus has been vastly over sized and a bit overrated when it comes to that club it's got,Its already been mentioned but its also too large there |
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| Archosaur | Oct 13 2012, 08:17 PM Post #82 |
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Unicellular Organism
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Isn't the ankylosaurs tail disproportionally short? |
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| theropod | Oct 14 2012, 02:47 AM Post #83 |
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palaeontology, open source and survival enthusiast
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poor anky. they seemingly where really oversized a lot (eve tough the comparison should assume a 1,4m skull from the excerpts from brochus paper that I have read). no way it could be heavier than rex, and it doesn´t seem like it would have been able to cause fatal damage swift enough. |
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| Verdugo | Oct 14 2012, 03:13 AM Post #84 |
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Large Carnivores Enthusiast
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This is weird, i thought that Ankylosaurus was evolved to fend up against T rex, i didn't know it was an easy meal for any T rex |
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| theropod | Oct 14 2012, 07:03 AM Post #85 |
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palaeontology, open source and survival enthusiast
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it´s really weird. but beign that small it seems very unlikely for it to successfully defend itself. it would just need to be bigger, otherwise the blunt trauma it will cause cannot fatally harm something as big as rex |
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| dinosaur | Dec 30 2012, 07:25 AM Post #86 |
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Heterotrophic Organism
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Victory for the tyrant lizard king! |
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| Carcharadon | Dec 30 2012, 07:27 AM Post #87 |
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Shark Toothed Reptile
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mismatch, ankylosaurus size is exaggurated, t.rex is far too big and deadly |
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| SpinoInWonderland | Dec 30 2012, 01:19 PM Post #88 |
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The madness has come back...
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Tyrannosaurus wins, nevermind my previous posts here... |
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| dinosaur | Dec 30 2012, 04:32 PM Post #89 |
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Heterotrophic Organism
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Wow! Finally! you favor the king for once!
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| SpinoInWonderland | Dec 30 2012, 04:38 PM Post #90 |
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The madness has come back...
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Tyrannosaurus is not the king!!!!!
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you favor the king for once!
2:24 AM Jul 14