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Mapusaurus roseae skeletal diagram. by Franoys Mapusaurus roseae skeletal diagram. by Franoys
For all those who thought that Tyrannosaurus arms were small, here comes Mapusaurus, the most derived Carcharodontosaurid known (and also one of the largest, tied with Giganotosaurus). This is the one that hunted Argentinosaurus, not Giganotosaurus, and apparently it could have been social. It was the apex predator of it's enviroment.

Mapusaurus was found in the Huincul formation, and was named after the rose colored rocks it was found in and after Rose Lewtin who sponsered the expedition. It lived 97-93 million years ago (Late Cretaceous, Cenomanian age) in the Gondwanan continent, in what today is Argentina.

Several bone elements are coherent with at least one Giganotosaurus sized individual, all of the biggest axial skeleton remains match those of Giganotosaurus in size, and a maxilla, a fibula, a pubic shaft fragment, and a scapular blade fragment and an ischium could have belonged to it. The restoration is scaled to the size of this individual, although other smaller Mapusaurus bones were of course used and scaled up to match the size of the bigger remains.

This version is not completely final but it is close to it, and more deviations on this animal will come, perhaps one with the distinct individuals (at least some of them) and the rigurous skeletal/skeletals. 
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:iconjonagold2000:
JonaGold2000 Featured By Owner Mar 20, 2017  Hobbyist Traditional Artist
Can you start showing the known part again? I wanna know what this is based on.
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:iconfranoys:
Franoys Featured By Owner Mar 20, 2017
Will do eventually
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:iconasari13:
asari13 Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
cool
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:iconantonellisofbbender:
AntonellisofbBender Featured By Owner Feb 25, 2017  Student Filmographer
you are so good as scott hartman
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:iconthedinorocker:
thedinorocker Featured By Owner Feb 25, 2017
Great job!
But I would Scale it at 10 meter or so cause much of the described bones are from a specimen of that size (still a couple of specimens are clearly in the Giganotosaurus size class)
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
I will do another deviation ( or perhaps update this one) with more individuals, however this one intends to reflect the size of the big adults of the species. There are at the very least 7 partial bones coherent with an individual in Giganotosaurus size class. The fibula is well preserved.
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:iconthedinorocker:
thedinorocker Featured By Owner Feb 26, 2017
I know, but mantein it in a 10 meters range Will cost less cross scaling (with all the possible problems it could Give)...
Don t get it wrong, it s a fantastic work 
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:iconfranoys:
Franoys Featured By Owner Feb 26, 2017
Don't worry, the smaller remains were taking into account, the skull and most of the apendicular skeleton was done scaling smaller remains, with also the experience that I had with closely related creatures and their proportions as a correcting factor and a guide. The result is just scaled to the bigger remains. This is however not completely final and I keep working on the creature. As I said i will upload more comprehensive deviations addresing more things.
And thank you!
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:iconbh1324:
bh1324 Featured By Owner Feb 25, 2017
Do I spie a Charcarodontosaurid trying to be a Tyrannosaurinae?

Robust skull and shortened skull, deep and broad rib cage, small arms. It is pretty interesting.
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
The skull is deep and not as elongate because of a taller and shorter maxilla with fewer amount of teeth, but it is possibly not very wide because the nassals are much narrower than in Giganotosaurus. The ribcage is deep, but the shape of the ribs suggest that it is deeper than it is wide, like in Giganotosaurus. Another thing that would make Mapusaurus a bit more Tyrannosaur like than his relatives is the more elongated distal portion of the hindlimbs, which would make it more cursorial than it's relatives as well.

Indeed it is interesting, it is always intriguing to see the convergence in the evolution of highly derived giant theropod forms
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:icondinosaurguy10:
Dinosaurguy10 Featured By Owner Feb 24, 2017   General Artist
jafoasikfdakfhasd
noice
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
Thank you, glad you liked it!
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:icondinosaurguy10:
Dinosaurguy10 Featured By Owner Feb 25, 2017   General Artist
np :D
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:icon105697:
105697 Featured By Owner Feb 24, 2017
Wow, the snout is so.........short.
And the arms are so.......short.
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:iconacepredator:
acepredator Featured By Owner Feb 24, 2017
Considering that most people think Mapusaurus was just 10m long,..
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:iconkirkseven:
kirkseven Featured By Owner Feb 26, 2017
i mean, its no 13.7 meter 9 tonne behemoth.
but its bigger than just 10 meters xD
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:iconfranoys:
Franoys Featured By Owner Edited Feb 25, 2017
If you want to counter people who say that absurdity, they do so because the highest estimation provided in the table 1 in apendix lll is 10.2 meters (but it is based on different remains to the ones that are used to scale this restoration, and as you can see they are quite a few), so the lazy people that doesn't bother reading the article in detail ( even reading the abstract would be enough), just go to the table and cite whatever is written in it ignoring everything else. There are plenty of bones that suggest the presence of individuals bigger than that.
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:iconacepredator:
acepredator Featured By Owner Feb 25, 2017
Yep
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner Feb 24, 2017
Totally not just slightly-tweaked version of Giganotosaurus carolinii skeletal diagram. by Franoys :D (Big Grin) :D (Big Grin) :D (Big Grin) 
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
Well, Giganotosaurus serves as an excelent base (the best base really since as sss pointed out they are sister taxa) but as much Mapusaurus material as possible has been used, drawn with detail, and scaled, and by that I mean the bones that have been ilustrated and described in detail in Coria and Currie. Some cross scaling also happened with the smaller specimens, basically the whole head and all of the apendicular skeleton, but that is hard to notice when just eyeballing the resulting restoration.

The axial skeleton is very poorly preserved and described but it accounts for the proportional differences between Mapusaurus and Giganotosaurus, specially in the height and width of the cervical and the dorsal neural spines. Please notice that that Giganotosaurus alredy has bones based and restored after mapusaurus, like the scapulocoracoid, and the feet (partially, specially the metatarsals, since those are not preserved in Giganotosaurus)

So, I don't know if this comment was just and attack and intented to substract from the credibility of the skeleton or it was jokey, anyway it did fail since it is not funny and it also failed tremendously in the other aspect, as anyone who reads this reply will be able to see.
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:iconspinoinwonderland:
SpinoInWonderland Featured By Owner Feb 25, 2017
Well it was jokey, I myself wouldn't have done much more regarding it :XD:

I'll have just swapped heads and called it a day :D (Big Grin) 
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:icon105697:
105697 Featured By Owner Feb 24, 2017
They are sister taxon.
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:iconowlbaskingshark:
Owlbaskingshark Featured By Owner Feb 24, 2017  New Deviant Hobbyist Traditional Artist
would you mind if I used your skeletals as references? I'll credit you and put a link to your account.
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
You can use them as references, of course, in fact I'll be honored.
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:iconowlbaskingshark:
Owlbaskingshark Featured By Owner Feb 25, 2017  New Deviant Hobbyist Traditional Artist
thanks!
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:iconthegloriousdinobear:
TheGloriousDinoBear Featured By Owner Feb 24, 2017
Quite a lovely skeletal, nice to have a new one around for the animal. 
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:iconfranoys:
Franoys Featured By Owner Feb 24, 2017
Thank you for the kind words.
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:iconpaleojoe:
PaleoJoe Featured By Owner Feb 24, 2017  Student Traditional Artist
Great work so far, 😀 I would suggest making the dorsal neural spines taller than the centrum as in Tyrannotitan. I do look forward to comparing our reconstructions.
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:iconfranoys:
Franoys Featured By Owner Edited Feb 24, 2017
Thank you!, and idem.

The dorsal neural spines are relatively taller than in Giganotosaurus alredy, they match/ surpass the size of the neural spines described and ilustrated in Coria and Currie 2006, unless there is something that I missed (please feel free to point out).

No complete dorsal vertebrae is found or ilustrated, although i haven't tried compositing the two ilustrations of the different regions in the papers.
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:iconpaleojoe:
PaleoJoe Featured By Owner Feb 24, 2017  Student Traditional Artist
After comparing your Giganotosaurus and Mapusaurus I realized they actually have different neural spine proportions, so it's all good and you're welcome.😉
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:iconpaleojoe:
PaleoJoe Featured By Owner Feb 24, 2017  Student Traditional Artist
Even though Mapusaurus and Giganotosaurus are sister taxa.
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:iconkirkseven:
kirkseven Featured By Owner Feb 24, 2017
Shouldn't it be over 13.6 meters and 9 tonnes?

perhaps your just a T.rex fanboy.
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:iconfranoys:
Franoys Featured By Owner Edited Feb 24, 2017
So many comments about T rex in a deviation about an animal that hasn't been restored ever :P, well except that old Sikonnen skeletal I believe.

No, I don't think that scaling a pubis shaft fragment from Giganotosaurus is advisable; as proven by the looks of other body sections, the animal doesn't need to be an exact copy of Giganotosaurus, which is another different genus. Higher variability than 10 percentual points in pubic shaft width is observed within individuals of the same species, as it is one of the most variable bones in Theropoda and one of the least reliable for scalings.
The pubic shaft fragment is not ilustrated, but going by what has been written about it it is a very poorly preserved remain, only 7.2 cm in length of the shaft are preserved (the full shaft would have been well over 1 meter long, being conservative), and the comparison with Giganotosaurus pubis is made via the width of it. (without even knowing which part of the shaft is preserved). Furthermore the concrete measurements of Giganotosaurus pubis have not been published, and it hasn't been ilustrated either.

Several bones are coherent with a very similarly sized individual, the different body regions of the animal are scaled to theese remains. Other remains such as the fibula, the maxilla, the neural spines, the axis, the cervical vertebrae, the ischia, the femur, etc also show proportional differences with Giganotosaurus despite most of those bones being equally as big in one or two metrics. We don't know even if the whole pubis would have been 10% bigger in every dimension at all, as restored here it is not just 10% wider but 10% bigger overal than the pubis in Giganotosaurus which could have not been the case.
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:iconkirkseven:
kirkseven Featured By Owner Feb 24, 2017
alright.

you win this time..
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:iconshaochilong66:
Shaochilong66 Featured By Owner Feb 24, 2017
kek
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:iconjonagold2000:
JonaGold2000 Featured By Owner Feb 24, 2017  Hobbyist Traditional Artist
lmao lets see all those rex haters try and say its undersized lmao, eat it stupid haters
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:iconevodolka:
Evodolka Featured By Owner Feb 24, 2017  Hobbyist Artist
"rose earth lizard" what a lovely name for a prehistoric KILLING MACHINE :D
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:iconpeteridish:
PeteriDish Featured By Owner Mar 13, 2017  Hobbyist Photographer
it sprayed the earth with crimson blood of its unfortunate prey items :D
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:iconevodolka:
Evodolka Featured By Owner Mar 13, 2017  Hobbyist Artist
yep... Llama Emoji-09 (Drinking Tea) [V1]... that would explain it
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
I absolutely love the name as well!
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:iconevodolka:
Evodolka Featured By Owner Feb 25, 2017  Hobbyist Artist
honestly i just expected it to be boring like "Mapu lizard" as i see way too many of those types of names
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:iconfranoys:
Franoys Featured By Owner Feb 25, 2017
True, luckily they were more creative with this one, although saldly that's a rarity xD
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:iconevodolka:
Evodolka Featured By Owner Feb 25, 2017  Hobbyist Artist
glad you agree
they used to be all over the place, i guess it's just because we have used up all the cool meanings so now its just "lets just call it either the guy who found it or the place it was found in"
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