type of allosaurus bigger than t rex?

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wilferrel

Bronx, NY

#1 Oct 28, 2008
allosaurus bigger than t rex?
NK Dart

Australia

#2 Oct 28, 2008
no.

“I don't exist:youve gone crazy”

Since: Aug 08

Australia

#3 Oct 29, 2008
Almost as long as the average ones (a massive example of allosaurus fragilis reached a length of 12 metres, but would have only weighed 4 tonnes).
regnar

North Brunswick, NJ

#4 Nov 11, 2008
No Allosaur was bigger then a t rex. Maybe as long but not as heavy
jak

Fort Collins, CO

#5 May 22, 2011
there is a type of allosaurus called allosaurus amplexius that was 45 feet long so that is the one that is bigger than rex it is hard to find out that the way I found out was by not going on the internet but asking a paleontologist and he said allosaurus amplexius was 45 feet long and trex was 42 feet long so yes there is is a type of allosaur bigger than a tyrannosaurus. I have one more thing to say allo was allso smarter and faster
archosaur

Stafford, VA

#6 May 22, 2011
Got a source for any of that? A. amplexus was around 39 feet, whereas T. rex maxed out at around 44 feet. Also, there is no way Allosaurus was faster or smarter than Tyrannosaurus. Tyrannosaurus is built for speed, and it has a fairly large brain compared to other large theropods.

Since: Sep 10

Location hidden

#7 May 22, 2011
Tyrannosaurus was still much heavier than just about every allosaurid.
Brachiotitan

Calgary, Canada

#8 May 22, 2011
Well, I doubt that any Giganotosaurus or Carcharodontosaurus would come close to sue's body mass.
troodon88

United States

#9 May 22, 2011
no, trex outweighed it and allosaurus likely wasnt as big either, around 30-35 feet ussually
Razor Jaws

Sarasota, FL

#10 May 22, 2011
Brachiotitan wrote:
Well, I doubt that any Giganotosaurus or Carcharodontosaurus would come close to sue's body mass.
Correction: http://en.wikipedia.org/wiki/Giganotosaurus This says giga's top eight is 13.3 tons, while t rex at 9.1 MAX.
Spinodontosaurus

Cockermouth, UK

#11 May 23, 2011
That study was flawed, Giganotosaurus and Tyrannosaurus have completely different proportions yet that study tried to lump EVERY theropod into the same body plan. It didnt work.
Brachiotitan

Calgary, Canada

#12 May 23, 2011
So much misinformation, so little time.
Sillosuchus iz 10 m

Saronno, Italy

#13 May 23, 2011
THERRIEN & HENDERSON, 2007
MY THEROPOD IS BIGGER THAN YOURS OR NOT: ESTIMATING BODY SIZE FROM SKULL LENGTH IN THEROPODS
http://www.bioone.org/doi/abs/10.1671/0272-46...
To develop a widely applicable method to estimate body size in theropods, the scaling relationship between skull length, body length, and body mass was investigated using 13 strictly carnivorous, non-avialan theropod taxa ranging in size from the 1-m Sinosauropteryx prima to the 12-m Tyrannosaurus rex. Body length was obtained from the literature for complete to nearly-complete specimens and body mass was obtained from three-dimensional mathematical slicing of those same specimens to ensure accurate body length-body mass associations. Least-square regressions reveal a tight correlation between skull length and body length (SK-BL) and skull length and body mass (SK-BM). The SK-BL regression is negatively allometric, which indicates that skulls become longer relative to body length with increasing body size. In contrast, the SK-BM regression is positively allometric, indicating that body mass increases faster than skull length with increasing body size. These conclusions confirm that the common practice of scaling isometrically smaller relatives of a given taxon to obtain body length and body mass estimates is not valid. Although predictive equations derived from the regressions fail to predict accurately body size in abelisaurids and juvenile theropods due to their different head/body proportions, they produce accurate body size estimates for theropods of known body size, thus validating their applicability. Body size estimates for Carcharodontosaurus and Giganotosaurus, approaching 13 m and 14 tons, suggest that they may have surpassed Tyrannosaurus in size. A revised body size estimate for a large Spinosaurus specimen suggests a much shorter and heavier animal than recently suggested.
Brachiotitan

Calgary, Canada

#14 May 23, 2011
But something that has a shorter, not as dense body and a longer but lighter skull cannot be heavier than another animal that is longer(in true body length) and stockier.
Other Lizard

San Francisco, CA

#15 May 23, 2011
Brachiotitan wrote:
Well, I doubt that any Giganotosaurus or Carcharodontosaurus would come close to sue's body mass.
Since WHEN were you a T.Rex fanboy?

“Epic Facepalm!”

Since: May 11

Queen Creek, AZ

#16 May 23, 2011
Brachiotitan wrote:
Well, I doubt that any Giganotosaurus or Carcharodontosaurus would come close to sue's body mass.
GIGANOTOSAURUS = 42-46 ft long, 12,000-14,000 lbs
CARCHARODONTOSAURUS = 39-43 ft long, 13,200-16,000 lbs
TYRANNOSAURUS = 44-48 ft long, 12,000-14,000 lbs

My estimates can be seen here by clicking the link: http://theropods.blogspot.com/2011/04/theropo... Scroll down to the header entitled, "Theropod Size Conclusions".

My estimates can be explained here:
Giganotosaurus and Carcharodontosaurus - http://theropods.blogspot.com/2011/03/theropo...
Tyrannosaurus - http://theropods.blogspot.com/2011/03/theropo...
Other Lizard

San Francisco, CA

#17 May 23, 2011
48ft T.Rex? Laughable.

“Epic Facepalm!”

Since: May 11

Queen Creek, AZ

#18 May 23, 2011
Yeah 48 ft maximum. Be lucky I didn't say it could grow to 60 ft like some UCMP 118742 fanboys.
Well heck, you saw my estimates for the other UCMP specimen right? 14.99 m = 49 ft.
troodon88

United States

#19 May 23, 2011
no, 48 feet is too big for trex, and hey its my favorite dinosaur, but thats completely wrong, though i do agree that spino and giga are also said to be bigger than they really are alot

“Epic Facepalm!”

Since: May 11

Queen Creek, AZ

#20 May 23, 2011
Fine, 42-46 ft long - but in my opinion, still, 48's the maximum...

What about UCMP 137538?
* http://www.topix.com/forum/science/dinosaurs/...
* http://www.topix.com/forum/science/dinosaurs/...

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