1/40 Acrocanthosaurus- Released

[Blade-of-the-Moon]

I keep reminding myself that it's a rough sculpt at this point which means no where near final...but the jaw did seem odd..heh... in the last two pics it looks fine...just hte first two it seemed short...couln't figure it.... :?

I like the overall pose...I'm getting the impression he/she is a large, heavy animal that may have just spotted a prey item or something else of interest.

[Tyrannax]

It seems to be a bit smaller than the Tyrannosaurus. Is he in scale with the others? I'm sure you told us, but I'd rather not go sniffing though all these threads to find it.

I'm almost positive these are in scale as I think I've read somewhere that your Tylosaurus was canceled due to a faulty size?

[[][][]cordylus[][][]]

If he is in scale with the trex he would be slightly larger...

[Tyrannax]

Hm? Acrocanthosaurus grew to 38 feet. I am almost positive there isn't a specimen over 40 feet, is there?

[timlee3005]

Apr 7, 2009 20:09:13 GMT Tyrannax said:

Hm? Acrocanthosaurus grew to 38 feet. I am almost positive there isn't a specimen over 40 feet, is there?

Not so far as I know

[tetonbabydoll]

He may be shorter, but it looks as though it may have had more overall mass, especially with a hump instead of sail.

[Tyrannax]

Cordylus, Acrocanthosaurus was a shorter, skinnier, theropod that was closer in size to Allosaurus. I may be wrong, but I do not think any specimen has ever exceeded the size of Sue, or Scotty now, since he is probably longer.

[[][][]cordylus[][][]]

Based on some bones found by creationists in the 90's (I think), they estimated him to be about or over 40 feet long, and using the tail lengths of similar allosaurs, it could be even longer. And with that hump that was most likely covered by thick muscles and fat, that could have added a thousand pounds or so to the whole animal...

The average acro I think was slightly larger than the average rex (Av. rex = 38 feet or so, Av. Acro = 40 feet or so). And with that sail...


Acro has always been one of the largest.


I wonder what colors this guy will have....

[Tyrannax]

Are you sure? Maybe bell could shed some light...or better yet Tomhet since he admires the theropod so much. I am pretty sure 38 feet was the largest, but than again I am basing this off facts from long ago.

That is true, the spine would make the animal appear larger, but remember its build in general was not as large as Tyrannosaurus. Not that it matters which was larger, but Tyrannosaurids are one of the most if not the most strongly built theropods.

In any case, they were both massive animals and it would not matter which one were to attack us as we'd be dead anyway. ;D

But I am also sure that you know that Tyrannosaurus usually grew to over 40 feet if it survived long enough. Animals under 35 feet were still growing, and died of causes by means of other Tyrannosaurids or some sort of natural cause.

Either way, are these in scale or not?

[dinonikes]

I used a skeletal reconstruction that had a meter line next to it to show size and scale- I just scaled up the skeletal reconstruction til the meter line was one inch in length so it was in scale with 1:40. The skeleton reconstructed in the drawing may not have been the largest Acro ever found- i just went with the reconstruction on this one- the jaw is in scale with the rest of it- I forget the name of the site- its the same one that I got the supersaurus skeletal reconstruction drawing from-

[Meso-Cenozoic]

Well, as far as I could find, Acro seemed to be about the same length as a large Allo, but was a much heavier animal.

This chart puts him at about 11 meters (36 feet). I guess that would be an average adult size. But, I'm sure there were exceptions!

[dinonikes]

Well, I am right in there - this piece measures approx. 11 inches in length-

[Tyrannax]

That is about right. I do not think many if any Acrocanthosaurs surpassed the length of the largest Tyrannosaurs.

[Blade-of-the-Moon]

I agree..Acros weren't as big ol' Rex from what I always heard and read...11" sounds right for 1/40..larger than Safari's as well..but that could be the pose.

To re-iterate... all the pieces were supposed to be 1/40.. unless they are super tiny and need scaling up to be workable ..that was how I remember the scale issue being addressed. ..

[[][][]cordylus[][][]]

Apr 8, 2009 3:08:06 GMT Tyrannax said:

That is about right. I do not think many if any Acrocanthosaurs surpassed the length of the largest Tyrannosaurs.

Well.... the largest acros could be larger than the largest rexes... After all, it seems every day they discover something bigger and bigger.... Keep you mind open.


And it doesn't seem fair to compare the average "x" to the biggest "x"...

[stoneage]

Apr 7, 2009 21:53:19 GMT Tyrannax said:

Are you sure? Maybe bell could shed some light...or better yet Tomhet since he admires the theropod so much. I am pretty sure 38 feet was the largest, but than again I am basing this off facts from long ago.

That is true, the spine would make the animal appear larger, but remember its build in general was not as large as Tyrannosaurus. Not that it matters which was larger, but Tyrannosaurids are one of the most if not the most strongly built theropods.

In any case, they were both massive animals and it would not matter which one were to attack us as we'd be dead anyway. ;D

But I am also sure that you know that Tyrannosaurus usually grew to over 40 feet if it survived long enough. Animals under 35 feet were still growing, and died of causes by means of other Tyrannosaurids or some sort of natural cause.

Either way, are these in scale or not?

There is a large amount of uncertainty when estimating the size of Dinosaurs. Organisms often vary proportionally within the same species, not to mention higher taxonomic divisions. Also the technique used to estimate mass varies between specimens. Mass varies by the cube of distance so is much less accurate at large sizes. Mass probably varied within an individual depending on external variables.
The largest theropod found so far is Kelmayisaurus gigantus found by Grady in 1993 in China. It is from the Early Cretaceous. It's nearly complete vertebrae column was reported to have measured 22 meters. It hasn't been published yet and many believe it's from a Sauropod.
Next is Spinosaurus aegyptiacus. The largest of which was estimated to be 17.4 meters and 12-19 tons, which was destroyed during World War II. Even the existing specimen is thought to be 15.9 meters and 9-15 tons. Also the holotype is considered to be a subadult.
The largest Gigantosaurus carolinii found is estimated at 13.5 meters and 5.2 tons.
There is a Deltadromeus agilis found estimated at 13.3 meters and 3.5 tons. Ironically this specimen is longer then the Carcharodontosaurus described along side it by Sereno. It is thought that Deltadromeus may be a junior synonym for Bahariasaurus.
The largest T-Rex at least in length is thought to be Sue. She was 11.2 meters and 6.7 tons. Horner said a specimen named Celeste was 10 % bigger. It was estimated at 12.3 meters and 8,9 tons, however no measurements have ever been presented. Paul Sereno originally estimated an unamed T-Rex at 13.6 meters and 12 tons. But Paul Sereno now says it's about the same length as Sue.
An Allosaurus fragilis was found estimated at 12.1 meters and 4-5 tons, longer then Sue. This shows how much variation occurs in a single species when the normal taxon is normally 7-9 meters. This shows how little we can trust any of our specimens as being representitive of their species.
Based on undesribed speciments Utahraptor ostrommaysorum is estimated at 12 meters and 2.7 tons.
There is also the Edmarka rex described by Bakker at 12 meters and 4 tons.
Bahariasaurus ingens is estimated at 11.9 meters and 2.5 tons.
An undescribed Carcharodontosauris was estimated at 11.8 meters and 3.5 tons. The press however claimed it was 13.7 meters and 5.5 tons.
Acrocanthosaurus atokensis largest estimate is 11.7 meters and 2.5 tons.
Deinocherius mirificus 10-13 meters and 2.4-4.3 tons.
Carcharodontosaurus saharicus 11.1 meters and 2.9 tons.
Suchomimus tenerensis 11 meters and 2.9-4.8 tons.
Chilantaisaurus tashuikensis 10-11 meters 2.6 tons.
Saurophaganax maximus 10.9 meters and 3.2 tons.
Yangchuanosaurus 10.5 meters and 3.1 tons.
Allosaurus tendagurensis 10 meters and 2.5 tons.
Therizinosaurus cheloniformes 9.6 meters and 6.2 tons.
Megaraptor namunhuaiquii 9.5 meters and 1.4 tons.
Ceratosaurus ingens 7-8 meters and 1.1 to 1.7 tons. The holotype quadrate of Ceratosaurus roechlingi is actually from a larger individual about 9.3 meters.
The point is that there are many theropods longer the T-Rex, and some heavier. T-Rex is no longer the Size King and as we find more and more specimens it may be relegated to a has been. ;D PS: Back in the day the Marx T-Rex was estimated at 50 feet.

[[][][]cordylus[][][]]

Wow stoneage. That was a mouthful. ;D

[dinonikes]

i am of the belief that since there just aren't enough skeletons of any of these types known to make any statements saying that they grew to any definitive size-just read the question in my avatar to see what I think about all of this size talk- but since I can't just make these things any old size I want- i tend to go with the average or the largest kown specimen depending on what information I find online- as far as the Acro- like i said above i used a reconstruction of a specific skeleton to make my piece and the size of my piece is a 1:40 scale representation of that information

[stoneage]

Apr 8, 2009 22:43:46 GMT dinonikes said:

i am of the belief that since there just aren't enough skeletons of any of these types known to make any statements saying that they grew to any definitive size-just read the question in my avatar to see what I think about all of this size talk- but since I can't just make these things any old size I want- i tend to go with the average or the largest kown specimen depending on what information I find online- as far as the Acro- like i said above i used a reconstruction of a specific skeleton to make my piece and the size of my piece is a 1:40 scale representation of that information

You are correct! Many species are only know from one or two specimens and then often times they are incomplete. T-Rex is relatively well known but many others are not. Until we find more complete specimens its difficult to predict average adult size. That was sort of my point earlier.

[Blade-of-the-Moon]

It's really funny when you think about it... fossilization is supposed to be a really rare occurence...so your chances are slim in the first place of finding anything...then you have individual groups and species to further divide the pie...it's a wonder we find more than one to base anything on in the first place...much less make good estimates..heh ;D