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Saurophaganax maximus by Fragillimus335 Saurophaganax maximus by Fragillimus335
The "Reptile Eating Master" was an enormous allosaurid, possibly the largest ever found.  It lived during the late Jurassic period in the western United states. This theropod was probably 11-13 meters in length and somewhere around 4-7 metric tons in weight.  Saurophaganax was likely the only Morrison theropod large enough to tackle the immense diplodocids in its environment.

This is a massively improved replacement to my "Sketchbook Saurophaganax" And about 5x larger!
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:iconkingovrats:
KingOvRats Featured By Owner Sep 29, 2015   Traditional Artist
You're always doing very good job at giving them colour patterns!
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:iconacepredator:
acepredator Featured By Owner Aug 30, 2014
Bizarre idea: since this super predator lived with Amphicoelias, it could have used the must larger herbivore as a screen to conceal itself, or follow it to attack prey fleeing in terror from a 250-ton sauropod.
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:iconfragillimus335:
Fragillimus335 Featured By Owner Aug 31, 2014  Hobbyist General Artist
Or other prey would use Amphicoelias as the worlds greatest body guard!  As aside note, Amphicoelias probably didn't weigh 250 tons.  Currently my best guess is ~120-170 tons. (If it was a giant Diplodocid)
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:iconacepredator:
acepredator Featured By Owner Edited Nov 7, 2014
ok thanks

sorry for the late comment.

And in any case that sauropod generated its own ecosystem, that is for sure.
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:iconthepivotfan2013:
ThePivotFan2013 Featured By Owner Mar 29, 2014
Fantastic. Just fantastic. 100/10  Clap 
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:iconfragillimus335:
Fragillimus335 Featured By Owner Mar 29, 2014  Hobbyist General Artist
It's way better than the first one! :0
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:iconunarla:
Unarla Featured By Owner Feb 26, 2014  Hobbyist Traditional Artist
Brilliant shading especially around the eyes and where the jaws connect:clap:
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:iconfragillimus335:
Fragillimus335 Featured By Owner Feb 26, 2014  Hobbyist General Artist
Thanks!
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:iconunarla:
Unarla Featured By Owner Feb 26, 2014  Hobbyist Traditional Artist
Your welcome:D
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:iconlikosaurus:
Likosaurus Featured By Owner Feb 26, 2014  Professional Filmographer
SICK!!!
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:iconrogerrex:
RogerRex Featured By Owner Feb 25, 2014
It's so ... BEAUTIFUL *-*
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:iconfragillimus335:
Fragillimus335 Featured By Owner Feb 26, 2014  Hobbyist General Artist
:D Thanks!
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:icontarbosaurusbatar:
TarbosaurusBatar Featured By Owner Feb 2, 2014  Hobbyist General Artist
Carnosaurs are the best! =)
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:iconfragillimus335:
Fragillimus335 Featured By Owner Feb 2, 2014  Hobbyist General Artist
It's hard to choose favorites!  But something about Acrocanthosaurus's skull is very cool!  So I guess carnosaurs win for me as well!
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:icontarbosaurusbatar:
TarbosaurusBatar Featured By Owner Feb 2, 2014  Hobbyist General Artist
Acro is like a mix of Carcharodontosaurs and Allosaurs. Carnosaurs are my favorite theropods (tied with Coelurosaurs).
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:iconfragillimus335:
Fragillimus335 Featured By Owner Feb 2, 2014  Hobbyist General Artist
My top five would have to be Acrocanthosaurus, Ceratosaurus, Giganotosaurus, Spinosaurus, and Utahraptor.  So it looks like carnosaurs win!
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:icontarbosaurusbatar:
TarbosaurusBatar Featured By Owner Feb 2, 2014  Hobbyist General Artist
If I had to do a top five, It would be (from least to most) Staurikosaurus, Tarbosaurus/Tyrannosaurus, Suchomimus/Oxalaia/Spinosaurus, Allosaurus/Epanterias and Giganotosaurus.  
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:iconfragillimus335:
Fragillimus335 Featured By Owner Feb 2, 2014  Hobbyist General Artist
Cool, and thanks for the watch man!
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:icontarbosaurusbatar:
TarbosaurusBatar Featured By Owner Feb 2, 2014  Hobbyist General Artist
You're welcome.
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:iconcarnosauria:
Carnosauria Featured By Owner Jun 22, 2013
Saurophaganax is one of my favourite dinosaur! But 5 tons sound a bit low for a 13m Saurophaganax.
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:iconfragillimus335:
Fragillimus335 Featured By Owner Jun 22, 2013  Hobbyist General Artist
Quite possibly right, it could be 5-7 tons.
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:icongigadino96:
Gigadino96 Featured By Owner May 28, 2013
He is like an Allosaurus with steroids :D.
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 28, 2013  Hobbyist General Artist
Yup!
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 2, 2013
I think you've underestimated Saurophaganax's mass.

Big Al's mass was estimated to be about 1500 kilograms, and was about ~7.5 meters in length, scaling from that, a 13-meter Saurophaganax would have a mass of ~7.816 tonnes, placing it in the same league as Carcharodontosaurus saharicus and the Giganotosaurus specimen MUCP-v95.

Now, you may say that the 1500-kilogram estimate is too fat, so let's drop it to about 90% of that, or about 1350 kilograms. That would still yield us a ~7.03 tonne Saurophaganax.

Even if you drop it further to 1200 kilograms, it would still yield a ~6.25 tonne Saurophaganax, which is about the size of a large(not Sue sized, just larger-than-average) Tyrannosaurus.

Just saying :D
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 2, 2013  Hobbyist General Artist
There's the rub, I doubt big Al weighed anything more than 1000-1100kg. Using the estimated weight of 2.3 tons for a 9.7 meter AMNH 680, I get 1060kg, which I think is spot on.

Still perhaps 5-6 tons would be more accurate.
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:icontheropod1:
theropod1 Featured By Owner May 13, 2013  Student Traditional Artist
I'd say 5-6t sounds good. Maybe even a bit more, but not dramatically (and I think T. rex ought to have been ~7t, I previously underestimated theropod weight a bit). From my discussions with @blaze at carnivora I learned Big Al's estimate when adjusting the ribs correctly would be 1,4t. Anyway, larger animals often get bulkier, but at least in sauropods we see a trend towards higher pneumatisation, which might also hold true for theropods. I think it is a good guess large theropods would have reduced mass werever possible in order to remain functional as predators.
I too regard 13m as the best lenght figure for this predator. Above that it gets too allometric and hypothetical, below seems a bit conservative considering large theropods have shorter arms than smaller ones.

Really like that drawing anyway dude!
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 13, 2013  Hobbyist General Artist
Thanks man! School can't distract me from dinosaurs... :D
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:icontheropod1:
theropod1 Featured By Owner May 13, 2013  Student Traditional Artist
Me too! Speaking of school, how's studying going? btw I found an amazing Youtube channel (UCberkeley), that's very useful for general biology!
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 13, 2013  Hobbyist General Artist
It's ok, I took a Calculus exam at 7 am today, and on the way a giant white pelican flew over my head, followed by a raven carrying an entire doughnut in its beak. That HAS to be a good omen! :D
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:icontheropod1:
theropod1 Featured By Owner May 14, 2013  Student Traditional Artist
That reminds me of a seagull that once stole my chicken leg at Lyme Regis!
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 2, 2013
The range I get using your suggested range is:
Minimum: ~5208 kilograms
Maximum: ~5728 kilograms

But this doesn't consider the general rule that the larger an animal gets, the bulkier it becomes, so this could be pushed to ~5.5-6 tonnes, but here's a catch: [link]

Someone actually took the effort to do a GDI, he did the Torvosaurus tanneri holotype, which was similar in size to Big Al, and he got results much higher than the 1-1.1 tonnes that you are suggesting.

So, 6-8 tonnes for Saurophaganax doesn't look unlikely after all...

P.S. AMNH 680 is more elongated than Big Al...
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 2, 2013  Hobbyist General Artist
So, then the elongation would also likely apply to Saurophaganax as well... I've seen the holotype skeleton of Big Al in person, and I can assure you, it is <1300 by how much I'm not sure, but being built like a bird, it could be a lot.
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 2, 2013
Wait, why would the elongation apply to Saurophaganax just because it did to an Allosaurus specimen?

Also, are you imagining Big Al as a shrinkwrapped figure or something more similar to Scott Hartman's?

Also, most dinosaurs are likely denser then birds, since they don't need to fly, they don't need as much pneumaticity...
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 2, 2013  Hobbyist General Artist
They are still a lot less dense than mammals...
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 3, 2013
I know, if Big Al had the density of a human, it would have reached around ~1600 kilograms in mass...
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:icondinobirdman:
DinoBirdMan Featured By Owner May 1, 2013  Student Artist
This is just as big as it goes and it could even ate the super giant like New Mexican Diplodocus.
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 1, 2013  Hobbyist General Artist
What New Mexican Diplodocus??? Info PLEASE!
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:icondinobirdman:
DinoBirdMan Featured By Owner May 1, 2013  Student Artist
Why the Seismosaurus!

I known about my favorite sauropod dinosaur was, an it also the same specie of this Diplodocus of the New Mexico state.

Right?;)
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 1, 2013  Hobbyist General Artist
Ooooohhhh...Diplodocus hallorum! Aka Seismosaurus... I guess he isn't exactly "new". :D
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:icondinobirdman:
DinoBirdMan Featured By Owner May 1, 2013  Student Artist
I know, it hard to make out.
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:iconpivotshadow:
PivotShadow Featured By Owner May 1, 2013
Wait...it was bigger than tyrannosaurus?
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:icongigadino96:
Gigadino96 Featured By Owner May 28, 2013
Little longer but lighter.
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 29, 2013
rather heavier actually...
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:icongigadino96:
Gigadino96 Featured By Owner May 29, 2013
Saurophaganax could reach 12-13 meters in length, but weighed 5.5-6 tons. If you are looking for a Theropod longer and heavier than Tyrannosaurus, excluding Spinosaurus, here Giganotosaurus, Carcharodontosaurus and perhaps Mapusaurus. These Theropods were bigger than Tyrannosaurus and Saurophaganax.
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 29, 2013
5.5-6 tonnes? Hello, are you still in the shrink-wrapped era? Scaling from the ~1.5-tonne Big Al estimate, a ~13-meter Saurophaganax would be in the region around 8 tonnes!
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:icongigadino96:
Gigadino96 Featured By Owner May 29, 2013
Ah no, it seems to me that you have on Carnivora Forum supported that weight until you've done the calculations that could potentially lead Saurophaganax to 8 tons.
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 29, 2013
I once supported lower estimates in general before, but I am constantly revising my knowledge of dinosaurs. You may have noticed that I add extra flesh to the skeletals in the latest comparisons I made, but I left them as they were in the early ones.
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:icongigadino96:
Gigadino96 Featured By Owner May 29, 2013
What's wrong? I remind you that Mickey Mortimer had estimated 5.2 tons for a MUPCv-95 of 13.5 meters ... Saurophaganax was probably longer but less robust, also Mickey Mortimer has estimated its weight at 6 tons.
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner May 29, 2013
Those estimates were old, made way back in the shrink wrapped era...

Mortimer also estimated FMNH PR2081 at 5.8 tonnes.
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:iconfragillimus335:
Fragillimus335 Featured By Owner May 1, 2013  Hobbyist General Artist
MAYBE longer, but almost definitely not heavier.
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