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| Utahraptor ostrommaysorum v Kentrosaurus aethiopicus | |
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| Tweet Topic Started: Sep 21 2012, 08:46 PM (4,828 Views) | |
| DinosaurMichael | Sep 21 2012, 08:46 PM Post #1 |
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Apex Predator
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Utahraptor ostrommaysorum Utahraptor (meaning "Utah's predator" or "Utah thief") is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period (in rock strata dated to 126 ± 2.5 million years ago). It contains a single species, Utahraptor ostrommaysorum. The holotype specimen of Utahraptor is fragmentary, consisting of skull fragments, a tibia, claws and some caudal (tail) vertebra. These few elements suggest an animal about twice the size of Deinonychus. Like other dromaeosaurids, Utahraptor had large curved claws on their second toes. One claw specimen is preserved at 22 centimetres (8.7 in) in length and is thought to reach 24 centimetres (9.4 in) restored. The largest described U. ostrommaysorum specimens are estimated to have reached up to 7 m (23 ft) long and somewhat less than 500 kg (1,100 lb) in weight, comparable to a grizzly bear in size. Some undescribed specimens in the BYU collections may have reached up to 11 m (36 ft) long, though these await more detailed study. Kentrosaurus aethiopicus Kentrosaurus is a genus of stegosaurid dinosaur from the Late Jurassic of Tanzania. Its fossils have been found only in the Tendaguru Formation of Tanzania, dated to the Kimmeridgian stage, between about 155.7 ± 4 Ma and 150.8 ± 4 Ma (million years ago). Apparently, all finds belong to one species, K. aethiopicus Hennig 1915. Kentrosaurus was described by German palaeontologist Edwin Hennig in 1915. Often thought to be a primitive member of the Stegosauria, several recent cladistic analyses find it to be derived, and a close relative to Stegosaurus from the North American Morrison Formation. Kentrosaurus generally measured around 4.5 metres (15 ft) in length as an adult, probably had a double row of small plates and spikes running down its back, and could use its tail as a "thagomizer" for defense. Kentrosaurus aethiopicus was a small stegosaur, smaller than Stegosaurus armatus, Hesperosaurus mjosi, Dacentrurus armatus and Tuojiangosaurus multispinus, and about as large as Huayangosaurus taibaii. The total length of a composite skeletal mount in the Museum für Naturkunde Berlin, Germany, from the tip of the snout to the tip of the tail is 4.5 m (15 ft). Slightly more than half of this length is made up by the tail. Larger single elements were found, so that the animal could probably attain a total length of 5.5 m (18 ft). The long tail of Kentrosaurus results in a position of the center of mass that is unusually far back for a quadrupedal animal. It rests just in front of the hip, a position usually seen in bipedal dinosaurs. ![]() ______________________________________________________________________
Edited by Taipan, Dec 4 2017, 08:34 PM.
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| Fishfreak | Sep 21 2012, 09:11 PM Post #2 |
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Friend of the fish
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utahraptor wins imo it was agile enough to dodge that tail and would be able to get to the head |
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| SpinoInWonderland | Sep 22 2012, 01:41 AM Post #3 |
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The madness has come back...
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Kentrosaurus wins, those spikes are very formidable |
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| Black Ice | Sep 22 2012, 01:46 AM Post #4 |
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Drom King
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Droms latched on and climbed on their prey. Its obvious the raptor wins. |
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| Mauro20 | Sep 22 2012, 01:49 AM Post #5 |
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Badass
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Utahraptor wins. |
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| Megafelis Fatalis | Sep 22 2012, 04:36 AM Post #6 |
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Carnivore
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The Raptor is fast and Smart enough to beat that Stegosaur ............... |
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| Carcharadon | Sep 22 2012, 06:16 AM Post #7 |
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Shark Toothed Reptile
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Utahraptor wins, it's alot more agile and could just bite the stegosaurid on the head before it gets hit by the tail
Edited by Carcharadon, Jan 22 2013, 10:35 AM.
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| theropod | Sep 22 2012, 06:28 AM Post #8 |
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palaeontology, open source and survival enthusiast
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the stegosaur is too spiky. If it can position itself there is no way for the drom to get past a long tail full of those thagomizers. if it leaps it´s dead. and it´s intelligence won´t help it here, unless you think it could use a gun... |
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| Fishfreak | Sep 22 2012, 01:33 PM Post #9 |
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Friend of the fish
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that'll be a bit hard with the spikes on the side and the spikes on the back |
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| SpinoInWonderland | Sep 22 2012, 06:47 PM Post #10 |
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The madness has come back...
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Latch on spiky prey? Any dromaeosaur that tries to latch on spiky prey is very mad |
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| theropod | Sep 22 2012, 06:59 PM Post #11 |
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palaeontology, open source and survival enthusiast
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^^yeah, if the drom latches onto the stegosaur that is evidence for being one of the dumbest predators one could imagine. it will be able to realize that it can´t do that |
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| Megafelis Fatalis | Sep 22 2012, 06:59 PM Post #12 |
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Carnivore
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If the Raptor is smart enough, it would go and bite the Stegosaur's small head, or bite the throat. |
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| theropod | Sep 22 2012, 07:01 PM Post #13 |
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palaeontology, open source and survival enthusiast
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and the stegosaur would stand still and let it do that without defending itself? and dromaeosaurs jaws aren´t built for biting the skull, that´s the most unlikely killing metod for a dromaeosaur that usually pierced the throat with it´s claws or attacked the flanks. |
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| Jinfengopteryx | Sep 22 2012, 07:02 PM Post #14 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Doing things like that is instinct. Also, the Kentrosaurus would of course turn them away. EDIT: theropod was faster. Edited by Jinfengopteryx, Sep 22 2012, 07:02 PM.
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| Megafelis Fatalis | Sep 22 2012, 07:04 PM Post #15 |
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Carnivore
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The Raptor is much faster than the Stegosaur, it could use its claws as you said to rip the neck . |
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