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Tyrannosaurus rex v Ankylosaurus magniventris
Topic Started: Jan 28 2012, 10:08 PM (48,651 Views)
Taipan
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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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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.

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Tyrannosaurus VS Ankylosaurus
Edited by Taipan, May 25 2018, 11:58 PM.
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Full Throttle
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Wouldn't the fact that Ankylosaurus is so low to the ground be an advantage in it's favor?

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Jaws
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t rex is to big
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Ankylosaurus would win easily. The t rex's bite was pretty powerful, but if you check the amount of trexes with ankylosaurus related injuries compared to the amount of ankys with t rex bites, both are rare (compared to lets say trexes vs triceratops) and no fatal t rex bites have been found on anktanks, but there have been several smashed trex limbs. I think that t rex would have A) tried to scavenge B) Nothing dead, time to hunt for a hadrosaur. It would only go after triceratopses if desperate and would not attack an ankylosaur.
(btw I am new here, Just some crap about myself- I am 13 and like paleontology(possibly one of the best my age in the country), astrophysics, baseball and soccer. I am kind of American (went to nine schools and am multiracial, look like nothing), am agnostic and asexual (had a girlfriend for a week awkward as :X ) which is like having no character to some people, and I live in England in a tiny flat with my grandparents. btw the sequel; I this is stupid but are we allowed to do (Made scientifically accurate- by me :D ) pokemon vs dinosaurs here or pop culture stuff vs prehistoric animals? Why am I even saying all this stuff? I'm gonna get banned.)
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Spartan
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Why should a T. rex rather go for a Triceratops than for an Ankylosaurus?
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Jaws
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Lord Max
Oct 15 2015, 05:02 AM
Ankylosaurus would win easily. The t rex's bite was pretty powerful, but if you check the amount of trexes with ankylosaurus related injuries compared to the amount of ankys with t rex bites, both are rare (compared to lets say trexes vs triceratops) and no fatal t rex bites have been found on anktanks, but there have been several smashed trex limbs. I think that t rex would have A) tried to scavenge B) Nothing dead, time to hunt for a hadrosaur. It would only go after triceratopses if desperate and would not attack an ankylosaur.
(btw I am new here, Just some crap about myself- I am 13 and like paleontology(possibly one of the best my age in the country), astrophysics, baseball and soccer. I am kind of American (went to nine schools and am multiracial, look like nothing), am agnostic and asexual (had a girlfriend for a week awkward as :X ) which is like having no character to some people, and I live in England in a tiny flat with my grandparents. btw the sequel; I this is stupid but are we allowed to do (Made scientifically accurate- by me :D ) pokemon vs dinosaurs here or pop culture stuff vs prehistoric animals? Why am I even saying all this stuff? I'm gonna get banned.)
ahem rex is more than 2x bigger
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Grimace
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Jaws
Oct 16 2015, 01:45 PM
Lord Max
Oct 15 2015, 05:02 AM
Ankylosaurus would win easily. The t rex's bite was pretty powerful, but if you check the amount of trexes with ankylosaurus related injuries compared to the amount of ankys with t rex bites, both are rare (compared to lets say trexes vs triceratops) and no fatal t rex bites have been found on anktanks, but there have been several smashed trex limbs. I think that t rex would have A) tried to scavenge B) Nothing dead, time to hunt for a hadrosaur. It would only go after triceratopses if desperate and would not attack an ankylosaur.
(btw I am new here, Just some crap about myself- I am 13 and like paleontology(possibly one of the best my age in the country), astrophysics, baseball and soccer. I am kind of American (went to nine schools and am multiracial, look like nothing), am agnostic and asexual (had a girlfriend for a week awkward as :X ) which is like having no character to some people, and I live in England in a tiny flat with my grandparents. btw the sequel; I this is stupid but are we allowed to do (Made scientifically accurate- by me :D ) pokemon vs dinosaurs here or pop culture stuff vs prehistoric animals? Why am I even saying all this stuff? I'm gonna get banned.)
ahem rex is more than 2x bigger
Doesn't especially matter. Would you want to fight a midget who was holding a metal baseball bat who's entire plan was to smash you in the teeth or knees with it the very second you got close enough?
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FishFossil
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Ankylosaurs likely had a defense strategy similar to that of turtles of simply hunkering down and waiting it out, and in an animal that large and well armored, trying to expose it's weak point is not an easy task. Plus, it had that massive tail which could easily do life threatening damage if the Tyrannosaurus misplaced it's steps. Unless the tyrannosaur could somehow displace the ankylosaur, which would be made much easier if Tyrannosaurus was indeed a pack hunting animal, I don't see it having great chances. One on One, I say this is a fight won easily by Ankylosaurus.
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Spinodontosaurus
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Since when was Tyrannosaurus twice the size of Ankylosaurus? Greg Paul estimated the largest known Ankylosaurus specimen at 6 tonnes, while Scott Hartman estimates the largest Tyrannosaurus at 8.4 tonnes. We're talking about a 30-40% weight advantage at most.
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Ausar
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^In that case, I believe Ankylosaurus is the clear winner.

But is there any idea on how heavy in would have been on average?
Edited by Ausar, Oct 17 2015, 07:57 AM.
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blaze
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We only have 4 specimens and they differ in size by about ~15% more or less.

I'm not totally convinced of Paul's 6t estimate, I've been wanting to do a GDI of it for a while, this might be the right moment to do it.
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Spartan
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Would be very appreciated, blaze.
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bone crusher
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Spinodontosaurus
Oct 17 2015, 07:53 AM
Since when was Tyrannosaurus twice the size of Ankylosaurus? Greg Paul estimated the largest known Ankylosaurus specimen at 6 tonnes, while Scott Hartman estimates the largest Tyrannosaurus at 8.4 tonnes. We're talking about a 30-40% weight advantage at most.
John Hutchinson's 9.5 tonnes Sue would come close but you get the point, T Rex is much bigger. I think if the rex manages to dodge the first tail swing then it could potentially move in and flip over Anky using its massive skull powered by heavily muscled neck to expose its underbelly.
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Ausar
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I think the problem all lies in if the T.rex could outmaneuver the Ankylosaurus and its attacks, which I don't believe will occur more often than not. Although I don't believe T.rex (or any theropod for that matter) was some beast that had just about no agility (as some people have made it out to be), anything that primarily uses its tail as a weapon needs to be a good turner. And when Ankylosaurus is constantly giving T.rex the tail, well...
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Jaws
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Spinodontosaurus
Oct 17 2015, 07:53 AM
Since when was Tyrannosaurus twice the size of Ankylosaurus? Greg Paul estimated the largest known Ankylosaurus specimen at 6 tonnes, while Scott Hartman estimates the largest Tyrannosaurus at 8.4 tonnes. We're talking about a 30-40% weight advantage at most.
anky=4 t

rex=9.5 t

anky is so overrated
Megafelis Fatalis
Jul 31 2012, 11:57 PM
Tyrannosaurus based on the 1.5m long skull, Ankylosaurus based on the largest skull (~65cm long)
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nuff said how is anky going to win?
Grimace
Oct 16 2015, 03:00 PM
Jaws
Oct 16 2015, 01:45 PM
Lord Max
Oct 15 2015, 05:02 AM
Ankylosaurus would win easily. The t rex's bite was pretty powerful, but if you check the amount of trexes with ankylosaurus related injuries compared to the amount of ankys with t rex bites, both are rare (compared to lets say trexes vs triceratops) and no fatal t rex bites have been found on anktanks, but there have been several smashed trex limbs. I think that t rex would have A) tried to scavenge B) Nothing dead, time to hunt for a hadrosaur. It would only go after triceratopses if desperate and would not attack an ankylosaur.
(btw I am new here, Just some crap about myself- I am 13 and like paleontology(possibly one of the best my age in the country), astrophysics, baseball and soccer. I am kind of American (went to nine schools and am multiracial, look like nothing), am agnostic and asexual (had a girlfriend for a week awkward as :X ) which is like having no character to some people, and I live in England in a tiny flat with my grandparents. btw the sequel; I this is stupid but are we allowed to do (Made scientifically accurate- by me :D ) pokemon vs dinosaurs here or pop culture stuff vs prehistoric animals? Why am I even saying all this stuff? I'm gonna get banned.)
ahem rex is more than 2x bigger
Doesn't especially matter. Would you want to fight a midget who was holding a metal baseball bat who's entire plan was to smash you in the teeth or knees with it the very second you got close enough?
very bad analogy rex is like 2-3 times bigger



carnegie vs anky=anky 60/40
stan vs anky=50/50
sue vs anky=rex 80/20
USMP vs anky=rex 100/0
Edited by Jaws, Oct 18 2015, 03:59 PM.
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blaze
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^You say that Ankylosaurus is 3t and then say that T. rex is 4.5 times bigger, that implies Tyrannosaurus is 13.5t which is simply untrue.

But funny that you said Ankylosaurus is 3t, I finished my GDI of Paul's reconstruction, at least 3.2t for the smallest specimen, it was heavier than this because I didn't include the armor and Paul's reconstruction probably is too skinny in the neck and tail region.

So at a minimum of 3.2t for the smallest specimen (AMNH 5214), the holotype which is 10% larger would weight 4.2t and the largest specimen, a little over 16% larger, would weight 5 tonnes.

Here's the image for anyone that wants to replicate the GDI.
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