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Mapusaurus roseae skeletal diagram. by Franoys Mapusaurus roseae skeletal diagram. by Franoys
Mapusaurus roseae is 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 dentary, a quadrate, a fibula, a tibia, a pubic shaft fragment, and a scapular blade fragment and 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.

Update 09/08/2018:

Updated the squamosal,dentary, and quadrate.
Redrew the neural arches of the cervical and dorsal vertebrae.
Added the catalog numbers of more specimens used for the scaling of this individual (More than 16 fossils are coherent with an individual of this size, that rivals or exceeds Giganotosaurus holotype size)
Re scaled the tail with the missing bits in Carcharodontosaurines restored after Acrocanthosaurus and Allosaurus.
Asuming the radius is from the same individual as the humerus and the 118 cm femora, the forearm and hand result a 15% larger than in the previous version, and thus the arm is less ridiculously small, although it is still very reduced in size.
Added mass estimation obtained via Graphical double integration, with a top view of the skull based on Carcharodontosaurus and Giganotosaurus and with the postcrania cross scaled from Acrocanthosaurus. (Journal will come eventually).
Changed the stance.

Update 16/09/2018

Turns out tibiae were oversized and the wrong size figure for them was listed. Fixed.
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:icontoostig:
Toostig Featured By Owner Oct 2, 2018
is this on average of most specimens found or is this the biggest specimen we have of mapusaurus roseae?
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:iconfranoys:
Franoys Featured By Owner Oct 2, 2018  Student Digital Artist
It is an individual based on the largest bones of the bonebed. Individuals based on the rest of the bones (the ones not listed in the deviation) are all smaller. The problem is that the original paper doesn't group all the remains on different individuals (aside from some vague suggestions) because they were found mixed up in a bonebed. You will see what I mean if you give the paper a look; I think it is available online.
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:iconmark0731:
mark0731 Featured By Owner Edited Aug 25, 2018
I noticed just now how much bigger the arm became.
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:iconchristina1969:
christina1969 Featured By Owner Aug 12, 2018
I see the height of the neural spines between Mapusaurus and Giganotosaurus is now bigger than it was in the previous versions. Interesting.
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:iconpaleosir:
paleosir Featured By Owner Aug 14, 2018  Hobbyist Traditional Artist
It is unknown whether the neural spines on the mount are restored.
So it is not impossible they both had comparable spines.
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:iconartlover1214:
Artlover1214 Featured By Owner Aug 10, 2018
Do you think there's enough differences between Mapusaurus and Giganotosaurus for them to be separate genera?
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:iconcarcharsauce:
carcharsauce Featured By Owner Aug 11, 2018  Hobbyist Filmographer
Skull shape is very different and they lived at different times
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Aug 11, 2018
I don't think skull shape is that much of an excuse, though. T.rex individuals tend to vary considerably in skull shape, and they're still in the same genus. 

I think the temporal gap between Giga and Mapu is a better way to know if they're not the same genus.
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:iconpaleosir:
paleosir Featured By Owner Aug 12, 2018  Hobbyist Traditional Artist
Nah time span splitting is atrocious. 
Use the osteological differences.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Aug 12, 2018
hm, okay

I mean, skull alone is not enough, is it?
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:iconpaleosir:
paleosir Featured By Owner Aug 12, 2018  Hobbyist Traditional Artist
It is if there is enough difference.
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:iconcarcharsauce:
carcharsauce Featured By Owner Aug 10, 2018  Hobbyist Filmographer
Yeeees mapusaurus is now officially my fave
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:iconnich3860:
nich3860 Featured By Owner Oct 26, 2018
Mapusaurus was always my favorite.... at least until we find more complete remains for Veterupristisaurus ;) (Wink) 
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:iconcarcharsauce:
carcharsauce Featured By Owner Oct 26, 2018  Hobbyist Filmographer
Ah yea that was my fave for a while. Hope it’s size of 11m is still accurate
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:iconnich3860:
nich3860 Featured By Owner Oct 26, 2018
Mapu or Veteru ? From what i know Veteru is 10m +-.
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:iconcarcharsauce:
carcharsauce Featured By Owner Oct 27, 2018  Hobbyist Filmographer
Veteru. Also it is pretty underrated
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:iconnich3860:
nich3860 Featured By Owner Oct 27, 2018
Yeah, it's too bad we don't have more complete remains of it, this was the biggest predator in an ecosystem that harbored Giraffatitan which is my favorite plant eater , hence it would have been it's main predator (the juveniles that is,)
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:icondeform2018:
Deform2018 Featured By Owner Aug 9, 2018  Student Traditional Artist
So, Mapusaurus is larger than Giganotosaurus now?
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:iconfranoys:
Franoys Featured By Owner Edited Aug 9, 2018  Student Digital Artist
The Giganotosaurus mass estimate is still for the old skeletal, it probably will go up a bit, I don't think it will exactly reach Mapusaurus' estimate because the dorsal view is identical, and the Mapusaurus skeletal has taller neural spines and a slightly deeper torso due to a larger pubis, the program is very exact and very sensitive to this kind of stuff, so it will probably yield a slightly higher mass estimate for this reconstruction than for the Giganotosaurus, but only by a couple dozen kilograms; which is negliable. The problem here is that I don't know exactly how wide theese two animals are in relation to one another, and a very slight variation in that could flip the tables.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Aug 9, 2018
Damn, Mapusaurus was a beast!

Cool update.
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:iconnich3860:
nich3860 Featured By Owner 3 days ago
IKR ? Mapusaurus FTW
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:iconfranoys:
Franoys Featured By Owner Aug 10, 2018  Student Digital Artist
It was, but the way in which it's description was written and the sizes listed and how was reported by the media (as well as it's name, which isn't as hyperbolic as Giganotosaurus and others) didn't allow for the fact to be very well known by the general public, and the meme that Mapusaurus could only get as big as a large Allosaurus is vey widespread.
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:iconcl1ff:
Cl1ff Featured By Owner Aug 9, 2018  Hobbyist Artist
This might seem like a weird statement, but this is a very handsome skeletal. It’s well done, has a great looking dinosaur, and the dinosaur has a name that I think is fun to say. Nice!
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:iconnich3860:
nich3860 Featured By Owner 3 days ago
He is  a very handsome dino ..... ;) (Wink) 
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:iconfranoys:
Franoys Featured By Owner Edited Aug 10, 2018  Student Digital Artist
Thank you very much!

I too love it's name.
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:iconmark0731:
mark0731 Featured By Owner Edited Aug 9, 2018
Poor Giganotosaurus, it got beeffed up the least.
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:icontkwth:
TKWTH Featured By Owner Aug 9, 2018  Hobbyist Digital Artist
Oooo, I like this! Mapusaurus has always been weird to me. I guess I always expected it to be a Giganotosaurus clone, given how the media basically portrayed the two as interchangeable lmao
Also is it just me or is the silhouette a lot cleaner this time around? ;) (Wink)
Just one bit of advice, I know I'm being a pain, but I'd recommend perhaps bringing the back leg forward a bit, in a more Hartman-like pose. It'd make the whole thing look a lot more balanced and less front-heavy and awkward. It already looks a lot more balanced than your other skeletals, where that front-heavy look has honestly always kinda bothered me, but that little bit of extra leg movement won't hurt ^-^
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:iconfranoys:
Franoys Featured By Owner Edited Aug 9, 2018  Student Digital Artist
Thank you, Mapusaurus takes a lot of time to reconstruct if you want to do it in a rigorous manner and it also requires having worked with other Carcharodontosaurids known by asociated skeletons beforehand, otherwise there is a severe risk of getting the proportions wrong because the remains were described individually and come from a bonebed composed by at least 7 individuals, so maybe portraying it just like a Giganotosaurus lookalike worked as a shortcut, they are still very similar animals anyway, after all they are sister taxa.

The hindlimb posture is posible and fine , the animal is perfectly balanced as the foot is planted before the COM, and it is not going to change, animals are not statues and terrestrial birds can adopt a wide variety of postures. I also don't feel comfortable copying the work of others.
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:icontkwth:
TKWTH Featured By Owner Aug 9, 2018  Hobbyist Digital Artist
Fair enough, I suppose. Perhaps my own aesthetic preferences got in the way of fair criticism :) also yeah, I guess if you had to cut corners while reconstructing it you could tallen the cranium and basically call it a day xD
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:iconkester14:
Kester14 Featured By Owner Aug 9, 2018  Student Digital Artist
triple upload I ascended.
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:iconimperator-201:
Imperator-201 Featured By Owner Aug 9, 2018
So it beats even Giganotosaurus in mass now? Strange.
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:iconfranoys:
Franoys Featured By Owner Edited Aug 9, 2018  Student Digital Artist
Well the bone measurements are there and they almost match, match or exceed those of Giganotosaurus (depending on the particular bone), so what's the strange thing?
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:iconimperator-201:
Imperator-201 Featured By Owner Aug 9, 2018
I didn't mean there was something factually off about it, it's funny to me is all.
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:iconfranoys:
Franoys Featured By Owner Aug 10, 2018  Student Digital Artist
Oh. Well it is still far from certain that the mass is significantly higher, look at this other response that I wrote for someone that asked something that had to do with this comments.deviantart.com/1/6655….
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:iconimperator-201:
Imperator-201 Featured By Owner Aug 10, 2018
Alright, thanks.
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:icondinosaurfaneric:
DinosaurFanEric Featured By Owner Jul 5, 2018
Well done. Love the accuracy.
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:iconcarcharsauce:
carcharsauce Featured By Owner Jun 17, 2018  Hobbyist Filmographer
Is this the largest known specimen?
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:iconfranoys:
Franoys Featured By Owner Jun 22, 2018  Student Digital Artist
Yes, the skeletal is scaled from the largest bones of the bonebed.
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:icontigris115:
tigris115 Featured By Owner May 5, 2018
smolarms
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:icongamerey:
Gamerey Featured By Owner Sep 22, 2017
This is a very detailed skeletal.  I have many questions about how one goes about making a skeletal diagram such as this.  How long did it take to make?  Where did you get the references?  Did you draw it by hand or on a computer?  If you drew it on a computer, what program did you use?  What is the overall process for making it?  Once again, great skeletal.
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:icontrefrex:
TrefRex Featured By Owner May 12, 2017
May I use this as reference? Permission
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:iconfranoys:
Franoys Featured By Owner May 12, 2017  Student Digital Artist
Sure, feel free to do so! Don't forget to give credit though.
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:icontrefrex:
TrefRex Featured By Owner May 13, 2017
;)
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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  Student Digital Artist
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  Student Digital Artist
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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