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| Giganotosaurus carolinii v Tyrannosaurus rex | |
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| Tweet Topic Started: Jan 31 2012, 05:48 PM (110,314 Views) | |
| Taipan | Jan 31 2012, 05:48 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. ![]() 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. ![]() ______________________________________________________________________________
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| Megasaurus | May 13 2017, 06:56 PM Post #616 |
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Heterotrophic Organism
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No giga holotype is same height or highter than Sue.T rex heavier https://www.google.cz/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjin8LAxuzTAhUDahoKHaRgBqgQFggoMAA&url=http%3A%2F%2Fwww.skeletaldrawing.com%2Fhome%2Fmass-estimates-north-vs-south-redux772013&usg=AFQjCNG4OY1y0uF8pvMkN8sXYTjNNR8fwQ Edited by Megasaurus, May 13 2017, 06:59 PM.
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| moldovan0731 | May 20 2017, 07:41 PM Post #617 |
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Heterotrophic Organism
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https://farm6.staticflickr.com/5457/31301763275_265d3c74a4_b.jpg Edited by moldovan0731, Jul 2 2018, 01:21 AM.
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| bone crusher | May 25 2017, 12:19 AM Post #618 |
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Heterotrophic Organism
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So according to some new update the legendary T Rex specimen UCMP 137538 "big phalanx" actually had a similar sized toe as Sue's but still wider at the midshaft by 1mm. So it could potentially be heavier maybe at 8800 kg? |
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| Spartan | May 25 2017, 12:48 AM Post #619 |
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Kleptoparasite
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Which new update? need five words |
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| bone crusher | May 25 2017, 01:02 PM Post #620 |
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Heterotrophic Organism
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http://asier-larramendi.deviantart.com/art/The-king-T-rex-563547842
It's more or less in the same ballpark. Also a new GDI on Sue was done which yields a 8830 kg weight. Judging by the skeletal restoration it appears to be perfectly fit, not overweight or shrink wrapped and falls right in between Hartman's 8400 kg and Hutchinson's 9500 kg. There's a very detailed description on how he attained the result in the article. http://franoys.deviantart.com/journal/Tyrannosaurus-rex-size-682386614 You can also see his findings on other theropods using the same GDI method.
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| Spartan | May 25 2017, 08:40 PM Post #621 |
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Kleptoparasite
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How is that a new update when it's over a year older than Snively's response who says the toe bone belonged to an animal probably slightly smaller than Sue? Anyway, I'm looking forward to his new publication:
(also from his response to user Grey) |
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| bone crusher | May 25 2017, 10:09 PM Post #622 |
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Heterotrophic Organism
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I honestly had no idea who Snively is and what kind of updates he's been making regarding the issue but sounds like he's a professional and very well informed indeed. Do you have a link to his homepage or something? Looking forward to his publication too! Also is it just me or it seems like Sue's weight is gradually going up throughout the course, it might eventually be settled with a 9000 kg as a consensus. |
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| Spartan | May 26 2017, 12:16 AM Post #623 |
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Kleptoparasite
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He's a researcher at the University of Wisconsin: http://eric-snively-uwlax.com/ https://www.researchgate.net/profile/Eric_Snively Yeah, T. rex really seems to be an anomaly in this regard. While most extinct giants get downsized over time the tyrant king just keeps getting more massive. |
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| bone crusher | May 26 2017, 12:59 AM Post #624 |
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Heterotrophic Organism
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Just found some interesting data on Scotty tho it's from 2014's paper by Roger B. J. Benson on "Rates of Dinosaur Body Mass Evolution Indicate 170 Million Years of Sustained Ecological Innovation on the Avian Stem Lineage" http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001853#pbio.1001853.s011 From the Excel spreadsheet he mentioned Scotty's femur length as 1333 mm compared to 1321 mm for Sue. Also Scotty's femur circumference is 570 mm but no data for Sue's (apparently it's 580 mm for Sue?). In terms of Tibia length, Scotty is 1140 mm vs 1185 mm for Sue. |
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| Wombatman | May 27 2017, 01:21 AM Post #625 |
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Herbivore
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On this topic, whenever you see a big theropod reconstruction, consider that the tail is probably shown too thin. Almost always. |
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| moldovan0731 | May 27 2017, 03:49 AM Post #626 |
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Heterotrophic Organism
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The comparison: http://imgur.com/exL2cql (I need five words). |
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| bone crusher | May 27 2017, 11:21 AM Post #627 |
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Heterotrophic Organism
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Scott Hartman is one of the few who properly added bulky tail muscle for T Rex in his last article. |
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| Kiryu2012 | Jun 29 2017, 03:05 AM Post #628 |
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Heterotrophic Organism
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I'm gonna go ahead and side with the Tyrannosaurus for its stronger bite and experience in taking on deadlier prey. |
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| Skuller_One | Sep 23 2017, 07:25 PM Post #629 |
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Heterotrophic Organism
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Sometimes , images explains everything ...![]() Especially , look at skulls ... |
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| Kazanshin | Sep 23 2017, 07:53 PM Post #630 |
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Herbivore
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For once, we agree. Rex takes this. |
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