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| Giganotosaurus carolinii v Mapusaurus roseae | |
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| Tweet Topic Started: Apr 1 2013, 04:14 PM (8,360 Views) | |
| Taipan | Apr 1 2013, 04:14 PM Post #1 |
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Giganotosaurus carolinii Giganotosaurus ("giant southern lizard"), was a carcharodontosaurid dinosaur that lived 93 to 89 million years ago during the Turonian stage of the Late Cretaceous period. It is one of the longest known terrestrial carnivores, bigger than Tyrannosaurus, but in length and weight, smaller than Spinosaurus. Although longer than T. rex, G. carolinii was lighter and had a much smaller braincase that was the size and shape of a banana. A well-developed olfactory region means it probably had a good sense of smell. Titanosaur fossils have been recovered near the remains of Giganotosaurus, leading to speculation that these carnivores may have preyed on the giant herbivores. Fossils of related carcharodontosaurid fossils grouped closely together may indicate pack hunting, a behavior that could possibly extend to Giganotosaurus itself. he holotype specimen's (MUCPv-Ch1) skeleton was about 70% complete and included parts of the skull, a lower jaw, pelvis, hindlimbs and most of the backbone. The premaxillae, jugals, quadratojugals, the back of the lower jaws and the forelimbs are missing. Various estimates find that it measured somewhere between 12.2 and 13 m (40 and 43 ft) in length, and between 6.5 and 13.3 tons in weight. A second, more fragmentary, specimen (MUCPv-95) has also been identified, found in 1987 by Jorge Calvo. It is only known from the front part of the left dentary which is 8% larger than the equivalent bone from the holotype. This largest Giganotosaurus specimen is estimated to represent an individual with a skull length of 195 cm (6.40 ft), compared to the holotype's estimated at 1.80 m (5.9 ft) skull, making it likely that Giganotosaurus had the largest skull of any known theropod. Giganotosaurus surpassed Tyrannosaurus in mass by at least half a ton (the upper size estimate for T. rex is 9.1 t). Additionally several single teeth, discovered from 1987 onwards, have been referred to the species. ![]() Mapusaurus roseae Mapusaurus ('earth lizard') was a giant carnosaurian dinosaur from the early Late Cretaceous (Cenomanian stage) of what is now Argentina. It was similar in size to its close relative Giganotosaurus, with the largest known individuals estimated as over 12.6 metres (41 ft) in length* and weight estimates of approximately 3 metric tons to 5.5 metric tons. Mapusaurus was excavated between 1997 and 2001, by the Argentinian-Canadian Dinosaur Project, from an exposure of the Huincul Formation (Rio Limay Group, Cenomanian) at Canadon de Gato. It was described and named by paleontologists Rodolfo Coria and Phil Currie in 2006. The fossil remains of Mapusaurus were discovered in a bone bed containing at least seven individuals of various growth stages. Coria and Currie speculated that this may represent a long term, possibly coincidental accumulation of carcasses (some sort of predator trap) and may provide clues about Mapusaurus behavior. Other known theropod bone beds include the Allosaurus-dominated Cleveland Lloyd Dinosaur Quarry of Utah, an Albertosaurus bone bed from Alberta and a Daspletosaurus bone bed from Montana. ![]() ______________________________________________________________________________________________________
Edited by Taipan, Dec 31 2016, 12:22 PM.
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| Big G | Jun 15 2013, 09:45 PM Post #31 |
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Herbivore
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it is unfair to say that MUPCv-95 was only slightly bigger but to say that the biggest Mapusaurus is 10% larger. If you want to use the 10% larger than the largest Mapusaurus, you should also use 6.5-8% larger for MUPCv-95 (as I do). Because, to be honest, it is possible, if not probable, that the largest Mapusaurus was not even 10% larger. |
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| theropod | Jun 15 2013, 09:50 PM Post #32 |
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palaeontology, open source and survival enthusiast
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Maybe more maybe less. Savest thing to say is it was 10% larger, but of course it may be 20% larger or not larger at all. The same also goes for MUCPv-95 tough, and in its case how much larger the element is is difficult to determine, and it is not quite as much larger as the pubic shaft of Mapusaurus, even tough maybe approaching it. |
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| Teratophoneus | Jul 8 2013, 06:35 AM Post #33 |
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Herbivore
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I'm not sure about this. While Mapusaurus is likely more slender, it was maybe slighty longer, so both were about the same size (~ 6-8 tons), or, at least, close. So, this is likely a parity, with a slighty edge for Giganotosaurus due to it's bulkier body. |
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| Teratophoneus | Jul 8 2013, 07:01 AM Post #34 |
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Herbivore
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![]() Here's my scale (The estimates were rounded) Edited by Teratophoneus, Jul 8 2013, 07:02 AM.
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| thesporerex | Jul 21 2013, 02:56 AM Post #35 |
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Kleptoparasite
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50/50 they are too similar to get a clear winner. |
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| theropod | Jul 22 2013, 12:09 AM Post #36 |
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palaeontology, open source and survival enthusiast
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Another point against the "more slender-hypothesis", apart from the one I already mentioned: It bases on remains of smaller animals, not the largest ones. A 1,3m femur is large, but not even close to the largest ones known for carcharodontosaurs (at least 1,4m), not to mention the size extrapolated for femora of the largest specimens of these. Smaller animals have more gracile bones, since they have to support a lighter body. So even tough the femora that are known are more slender, that doesn't mean at the same size lenght they would also be. That being said, even if some of the bones were more slender that would not necessarily mean a more slender animal, since there are great individual variations and I already showed the femur-circumference-method for mass estimates to be flawed. The strange ribcage and tiny pectorals in that Mapusaurus skeletal are mere hypothesis. The ribs are probably not even near complete enough to deduce something like that, and there's a scapular shaft known to be the same size as the one in Giganotosaurus. The evidence for their proportions and bulk to be greatly different is pretty weak if you ask me. |
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| Big G | Jul 30 2013, 03:56 AM Post #37 |
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Herbivore
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deleted post
Edited by Big G, Jul 30 2013, 04:54 AM.
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| vegetarian | Jul 30 2014, 10:12 PM Post #38 |
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Herbivore
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giganotosaurus wins 55% |
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| Teratophoneus | Oct 9 2014, 02:54 AM Post #39 |
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Herbivore
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Since the Teratophoneus who posted that scale...well, do I need to repeat that? Well, firstly, I'm not surprised that MisteryMeat favours M.rosae here. I'm joking. They both are too similar. M.rosae wasn't larger, G.carolinii wasn't bulkier. Both are identical (they're also very close relatives) in everything that can be usefull in this fight. It's even closer than G.carolinii vs C.saharicus. That's a draw by any ways. |
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| Megasaurus | Dec 29 2016, 02:52 AM Post #40 |
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Heterotrophic Organism
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50/50 Around same size and same weapons |
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| Soopairik | Oct 16 2017, 09:09 AM Post #41 |
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Carnoferox's sex toy
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Basically same dino, could turn out differently based on situations. |
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