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The size of Alamosaurus sanjuanensis

Carnosaur

MemberCompsognathusAugust 18, 201410193 Views40 Replies

This sauropod really lives up to the family name. The titanosaurs were the last of the giants, and Alamosaurus was no exception

The scientifically accepted size for this creature is enormous enough - 15 meters long and a head that towers into the sky at 8.4 meters.

Case closed right?

erhm...not really

In 1999, a string of neck vertebrate were discovered in the Big Bend region of Texas. The hillside in which it was discovered yielded partial pelvic bones and ten articulated cervical vertebrae.

Big Bend Alamosaurus dig

A cursory glance at the fossilized remains shows that they appear to be titanosaurine in nature

Don't quote me on that one, as i don't specialize in categorizing vertebrate based on a cursory glance. For all intensive purposes, they do resemble those of Alamosaurus and the likely hood of two titanosaur species inhabiting the same area at the same time is highly unlikely.

The vertebrae were found side by side, stretching for around 8 meters. From the pictures, those ten vertebrae look like the ten largest, which should account for almost all of the neck except for the first few cervicals behind the head. 23 feet, and we find that it is almost exactly 1.5 times bigger than the one listed above. If its proportions are like the other specimens of Alamosaurus found The numbers would be astoundingly large.

Confirmed Alamosaurus sizes:                 "Big bend sauropod"

Lenght: 15.6 meters                                Length: 24 meters

Height: 8.4 meters                                   Height: 12.6 meters

Now, let's look at some other titanosaur species for weight calculations.

Basing off of Aegyptosaurus( which was in the same length and height class)

 The 52-foot 'normal' animal probably had a mass around 15 tons. now, the 79 foot "big bend" specimen would be substantially larger then that. Titanosaurus were some of the heavier sauropods, and doing the basic calculations:

The 79-footer would have been about 50 tons (1.5^3 = 3.375)

There are vague rumors floating around the internet of a hundred foot specimen, which i believe to be just an internet rumor.

For now, i believe we have confirmation of this big bend sauropod belonging to Alamosaurus, and the already giant sauropod just got a bit bigger.

 

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

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Hiphopananomus
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I can agree with those estimates. I always found those 110 foot long and 100 ton estimates, blown out of proportions. 

"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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Rex Fan 684
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http://svpow.com/2009/09/02/how-big-was-alamosaurus/

 

Did you use this during your research? Looks similar.

 

I certainly think Alamosaurus could be bigger than the usual 15-18 meter, 15-30 ton estimates you see out there. Perhaps as big as 24 meters and 50 tons, maybe even bigger...

 

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Carnosaur
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i came across it, yes. The paper is what interested me more so then his numbers, though

Lehman, T.M. & Coulson, A.B. 2002. A juvenile specimen of the sauropod Alamosaurus sanjuanensis from the Upper Cretaceous of Big Bend National Park, Texas. Journal of Paleontology 76(1): 156-172.

Alamosaurus was most likely argentinosaurus' size, if not smaller. I think Argentinosaurus represents close to the size limit for a terrestrial creature

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

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Rex Fan 684
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I can't click on what you just put :/

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Me neither.

"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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Rex Fan 684
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Oh, almost forgot. Alamosaurus is my favorite sauropod with Camarasaurus and Titanosaurus right behind it.

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Cool, I personally like Aregentinosaurus and Saltosaurus The most.

"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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Carnosaur
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i always had a soft spot for saltasaurus. Omeisaurus is up there as well

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

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Rex Fan 684
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Here's my thinking. Hasn't really changed much...

 

http://www.jurassicworld-movie.com/community/forums/topic/28464

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Omeisaurus, is cool as well. I don't kno where my love for Saltosaurus comes from. to me it seems like a combination between a ankylosaur and a titnosaur.

"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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Rex Fan 684
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Did you ever see the episode of Dinosaur Planet, Alpha's Egg? Something tells me it'd appeal to you Hipho ;)

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Yeah, I've seen it. The one thing I didn't get is why they called the gigas/mapus Carcharadontosaurus. Otherwise I really enjoyed it.

"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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Rex Fan 684
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Same. I'd assume it was supposed to be Giganotosaurus.

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Yeah, your  probably right. Seemed a bit big for a mapu.

"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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Carnosaur
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I always thought they meant "Carcharodontosaurs"

Mapu was probably larger then Giga, actually. Quite interesting

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Rex Fan 684
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Also, Mapusaurus lived after Saltosaurus and Aucasaurus(I believe)...

 

 

Are you sure Carnosaur? The largest Mapusaurus fossils indicate animals about 12 meters long and 5-6 tons. The 14 meter, 8 ton estimates are usually considered too high.

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Yeah, I think your mistaken Carnosaur. Mapu seems to be much more slender then giga. And it doesn't seem as long ether.

"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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Carnosaur
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you guys realize that the largest mapusaurus is dimensionally 10% larger than the giganotosaurus holotype, which means at least 2% larger than MUCPv-95, and should, assuming geometric similarity, be 1/3 heavier.

Theropod database on Mapusaurus

Also, i don't quite understand where you guys get the "more slender then giga" idea, only the smaller carcharodontosaurs were slenderly built, and Mapu isn't one of them

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I copied this from the link you gave me...

 

"This taxon was discovered in 1995, but only reported to Coria in 1997, when he and Currie examined the material. It was announced at that years Society of Vertebrate Paleontology meeting, and described briefly in an abstract (Coria and Currie, 1997). At the time, only the remains of an 8 meter long specimen were known, and it was identified as an adult. Coria and Currie returned to the site in 1998 to discover the presence of at least six individuals, some of which Currie said could be larger than Giganotosaurus’ holotype. The largest specimens are MCF-PVPH-145, 185 and 202, which are about 100-103% the size of the Giganotosaurus holotype."

 

Could be larger than the holotype.

"Men like me don't start the wars. We just die in them. We've always died in them, and we always will. We don't expect any praise for it, no parades. No one knows our names." ―Alpha-98
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Hiphopananomus
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Giga

Giga

 

Mapu

Mapu

 

there are the upper estimates for mapu compared to the average estimates of giga... As you can see giga appears a great deal more robust then the Mapusaurus.

"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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