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Giganotosaurus carolinii v Tyrannosaurus rex
Topic Started: Jan 31 2012, 05:48 PM (110,324 Views)
Taipan
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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.

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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.

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Prehistoric Cat
Jan 31 2012, 04:53 PM
Giganotosaurus VS Tyrannosaurus
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Spartan
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Yes, pretty big. But T. rex isn't far behind.
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Ausar
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I actually found something quite interesting on the matter.

http://a-dinosaur-a-day.com/post/142307981405/if-t-rex-and-giganotosaurus-had-a-hotdog-eating

As she was trying to answer a weird question, she actually measured the the clearance (distance) in meters between the anteriormost end of the jaws at the maximum gape angles of Giganotosaurus and Tyrannosaurus. Since there's no publication about Giganotosaurus' maximum gape angle (which may warrant a caveat), she decided to base off of Allosaurus, which we do have info about.

After estimating the jaw lengths of both animals (using a size comparison of the two theropods by Scott Hartman) and doing some trigonometry, she ended up with a gape of 2.186 meters for Giganotosaurus and 1.849 meters for Tyrannosaurus. That's a ~18% difference. The difference is there, but it's really not all that much.
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Carcharadon
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http://rsos.royalsocietypublishing.org/content/2/11/150495

Tyrannosaurus can open its jaws wider than an alligator, but not as high as a carnosaur.

Regardless, both can very easily kill each other as both of their bites are beyond absolutely devastating. The winner is really the one that luckily gets the first good bite in.
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Black Panther
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Yes, thasslo, it did. It needed it to take bigger bites out if bigger animals like sauropods.
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Ausar
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Btw, regarding earlier comments about build and agility: even in the case that Giganotosaurus is more lightly built than Tyrannosaurus, it's not a given that this alone will give it greater agility because that assumes all else being equal.

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The central concentration of mass due to the abbreviation of the neck, body, and tail and reduction of the arms should have improved the maneuverability of tyrannosaurids compared with longer-bodied, longer-armed mega-avepods (Henderson and Snively 2004; Paul 2005). However, the more massive head of tyrannosaurids may have countered this mass concentration somewhat, although how much is difficult to assess because of uncertain differences in pneumaticity in mega-avepod heads. Snively and Russell (2003) concluded that the arctometatarsalian foot also improved the agility of tyrannosaurids.

link
Edited by Ausar, Jun 28 2016, 01:01 PM.
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Thalassophoneus
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Saurophaganax1
Jun 27 2016, 10:10 AM
Yes, thasslo, it did. It needed it to take bigger bites out if bigger animals like sauropods.
It is wrong to assume what its morphology was like from what its prey was, mainly because we cannot know about its prey if we don't judge from the morphology.
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Drift
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What is the consensus so far as to who would win from weaponry or size?
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bone crusher
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Both could kill each other in their own ways but T Rex could do it that much faster given the best case scenario. After all a crushed giga's spine would be instant kill while multiple laceration on Rex's neck and windpipe would take just that much longer for it to bleed to death.
Size wise if we're being super picky on reliable data then there are more heavier T Rex specimens than Giga type specimen. If we're to include the bigger jaw Giga specimen then we should also include the likes of big toe bone Rex and C Rex for hypothetical sizes. Yes I know sample size is extremely low for giga but that's just life.
The fight based on reliable found specimens should declare T Rex as the winner but none conclusive on a species level.
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Black Panther
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If the giga was able to get as good of a bite on the Rex's neck as the Rex would then it would easily kill the Rex in a matter of seconds. having dozens of 5-8 inch blade-like rec curved, and serrated teeth would tear the throat apart and kill it just as fast as the T.rex's bite.
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The All-seeing Night
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Quote:
 
Both could kill each other in their own ways but T Rex could do it that much faster given the best case scenario. After all a crushed giga's spine would be instant kill while multiple laceration on Rex's neck and windpipe would take just that much longer for it to bleed to death.
How many times does this need to be addressed?
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Black Panther
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Like three times......for each person.
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Ceratodromeus
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too many is the answer but ignorance is bliss.
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Black Panther
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I honesty don't know why people think the T.rex's crushing bite will one shot the giga. Hyenas and crocodiles have powerful crushing bite yet they don't one shot anything.
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Ausar
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It could depend on where they bite. I don't know what hyenas and crocodiles have done (although I don't doubt they're capable of what I'm about to mention), but other animals with puncturing teeth and powerful jaws seem to be able to kill with single skull bites (e.g. wolves and big cats). If Tyrannosaurus did that here, then it is possible to kill with one bite. But I think that's a bit of a cop out; the head is the head.
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bone crusher
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Ok so we all know Sue and CM9380 are much heavier than the scientifically confirmed data of Giga holotype, 8400kg vs 6800kg, 7500kg vs 6800kg respectively, and should have no issue to declare victory to those two t rex specimens. On equal weight, let's look at it this way.
T Rex
Weapon: 10/10
Strength: 10/10
Speed: 8/10

Giga
Weapon: 10/10
Strength: 8/10
Speed: 8/10

T Rex's more robust and proportionally bulky body build triumphs in Strength category and should ultimately aid it in a fight in a well drawn out scenario.
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