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The size of Utahraptor ostrommaysorum

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Carnosaur

MemberCompsognathusJuly 16, 20149905 Views6 Replies

Today an oddball for the series enter the ring...he is:

Utahraptor ostrommaysorum; Utah's thief

Why utahraptor you may be asking?

Well, it does have a widely accepted size atrributed to it, but there are some potentially large specimens that are rumored to exist in the BYU collection.

It is based on on caudals 2 times the lenght of another specimen, so it may be a bit early to tell something about its size.Though our picture of Utahraptor should change greatly in the next 2 years, maybe they will write something about its size.
I feel a bit uncomfortable when combining a 11 meter raptor with the new built. 5 ton dromaeosaurid anyone?

Well...not exactly. A 11 meter specimen would be pretty massive, though I doubt that caudal lenght is good for extrapolating. 

However, scaling from the run of the mill Utahraptor - 7 meters; 500 kg - (or 24 feet; 1100 pounds if that suits you) an 11 meter utahraptor would weigh around 2 tons. No more then an 8 meter Allosaurus Fragilis.

 Mickey  Mortimer has put this into consideration in his theropod database entry:

"Utahraptor ostrommaysorum Kirkland, Gaston and Burge 1993
(~12 m; ~2.7 tons) caudal vertebrae (Britt et al., 2001)
"

It would be almost 3 t.

That however, is using a 12 meter length that i have not seen repeated any where else.

There has also been talk that these remains aren't dromaeosaurid in nature, but those of Acrocanthosaurus or an extant relative.

I don't really buy into this, Carcharodontosaurs and dromaeosaurs aren’t exactly closely related or indistinguishable.  I have trouble believing the authors that figured them would misidentify carnosaur vertebrae to be those of a dromaeosaur, although that’s not impossible. Anyway, just a size difference is not enough to cast that much doubt on it, we know other extreme examples of animals from the same taxon showing such disparities. 

In conclusion, i will stick to the 7 meter; 500 kg estimates for Utahraptor until these fossils in the BYU collection are scientifically described and verified.

 

Nature doesn't deceive us; it is we who deceive ourselves.

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Replies to The size of Utahraptor ostrommaysorum

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Lord Vader
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Interesting. I see Utahraptor as one ton tops, and that's the size I use for fights. 

Jack of all trades. Master of none

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Hiphopananomus
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Good estimates, I myself see utharaptor in the 1500 kg to 1 ton range but, were all entitled to our opnions!

"Somewhere on this island is the greatest predator that ever lived. Second greatest predator must take him down."Roland Tembo"

"Jurassic park: The Lost World"

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Something Real
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CARNOSAUR - This is very interesting information you've presented! Indeed, an 11 meter, 2-ton Utahraptor would be a sight to see! Likely something I'd run from at a brisk pace were I to see it at a distance! :)

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Dynamosaurus Imperiosus/ Raptorexxx 700
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Thank you Carnosaur for doing what i requested of you and it was indeed very awesome of you i would suggest Shantungosaurus now.

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Carnosaur
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i've been wanting to do Shantungosaurus for a while now, looks like he's next up!

Nature doesn't deceive us; it is we who deceive ourselves.

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Sci-Fi King25
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This is interesting. I use the 7 meter size in my fights.

“Banana oil.”- George Takei, Gigantis: The Fire Monster

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