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Patagotitan mayorum skeletal reconstruction. by randomdinos Patagotitan mayorum skeletal reconstruction. by randomdinos
@Bac0nm0rph: lefa

Everyone's new favorite titanosaur. While the number of bones in Patagotitan's holotype and paratypes combined blows ArgentinosaurusFutalognkosaurus and possibly even Dreadnoughtus itself out of the water, it suffers from the problem of unfigured material; only a handful of the preserved elements are shown in the paper, and less of those have useable lateral views. Most of it therefore had to be drawn after the mounted skeletons at the Field and American Museums of Natural History, with the recovered bones adapted to their reported measurements.

The first thing you may notice is that the tail is... still fairly enormous, but much shorter in length than in the schematics; this is because the length of the caudals was probably reported including the articular condyles, which resulted in an oversized result when they were simply all added up. I used the caudals of Dreadnoughtus as a guide to resture the centrum length without condyles. The skull is also no longer using Bonitasaura as a base; the color key for preserved and unpreserved bones in the Bonitasaura craniology was reversed, so as it turns out there is far less known about its skull than I thought - Tapuiasaurus was the next best thing. The osteoderms are drawn after Mendozasaurus's, with arrangement based on the still unnamed Spanish titanosaur; it's quite possible that the number and position of them were very different from this drawing.

Previous version for comparison: sta.sh/01lwyhnsedi2
First version: sta.sh/0qiau0z5v9t

Update 12/21/18: Mostly aesthetic changes, fixed some transparency issues with the bones and reshaped soft tissue. Rescaled and redrew the skull, redrew manus, raised and pushed out the shoulders. It's possible the giant tail may be coming back in future updates, but don't hold your breath for it.
Also performed a whole new GDI, with a more accurate dorsal view - I had a hunch the masses were too low... it seems I was right. The other big two will be updated likewise.

References:
-Hussam Zaher, Diego Pol, Alberto B. Carvalho, Paulo M. Nascimento, Claudio Riccomini, Peter Larson, Rubén Juarez-Valieri, Ricardo Pires-Domingues, Nelson Jorge da Silva Jr., Diógenes de Almeida Campos (2011). "A Complete Skull of an Early Cretaceous Sauropod and the Evolution of Advanced Titanosaurians". PLoS ONE. 6 (2): e16663. doi:10.1371/journal.pone.0016663.
-Wilson, J. A., Pol, D., Carvalho, A. B. and Zaher, H. (2016), The skull of the titanosaur Tapuiasaurus macedoi (Dinosauria: Sauropoda), a basal titanosaur from the Lower Cretaceous of Brazil. Zoological Journal of the Linnean Society. 
-Carballido, J.L.; Pol, D.; Otero, A.; Cerda, I.A.; Salgado, L.; Garrido, A.C.; Ramezani, J.; Cúneo, N.R.; Krause, J.M. (2017). "A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs". Proceedings of the Royal Society B: Biological Sciences284 (1860): 20171219. doi:10.1098/rspb.2017.1219.
-Gonzalez Riga, B.J., Mannion, P.D., Poropat, S.F., Ortiz David, L., Coria, J.P. 2018. Osteology of the Late Cretaceous Argentinean sauropod dinosaur Mendozasaurus neguyelap: implications for basal titanosaur relationships. Journal of the Linnean Society, zlx103, doi.org/10.1093/zoolinnean/zlx…

Human silhouette from www.onlygfx.com/20-woman-silho…
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:iconkoprx:
koprX Featured By Owner Apr 21, 2019
Whats the reason for the extension of all your lognkosaurians?
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:iconrandomdinos:
randomdinos Featured By Owner Apr 22, 2019  Hobbyist Traditional Artist
Intervertebral cartilage updates; they had less than my other skeletals and less than what's seen in crocodilians, now they're consistent.
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:iconimemeeverything:
IMemeEverything Featured By Owner Dec 23, 2018  Hobbyist General Artist
"Largest dinosaur ever discovered"
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Jan 12, 2019
Giant sauropod hype could be a series.

Largest dinosaur ever: chapter I - Puertasaurus
Largest dinosaur ever: chapter II -  Dreadnoughtus
Largest dinosaur ever: chapter III - Patagotitan
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:iconimemeeverything:
IMemeEverything Featured By Owner Jan 12, 2019  Hobbyist General Artist
Prologue: Argentinosaurus
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:iconpeteridish:
PeteriDish Featured By Owner Dec 21, 2018  Hobbyist General Artist
Great job on this big boy! :D
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:iconrandomdinos:
randomdinos Featured By Owner Dec 21, 2018  Hobbyist Traditional Artist
Thanks!
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:iconmajestic-colossus:
Nice update! 
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:iconrandomdinos:
randomdinos Featured By Owner Dec 21, 2018  Hobbyist Traditional Artist
Thank you!
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:iconedczxc:
edczxc Featured By Owner Nov 19, 2018
patagotitan weight wrong.
weight the light.
patagotitan proper weight: 69 ton
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:iconfranoys:
Franoys Featured By Owner Edited Dec 21, 2018  Student Digital Artist
Look, I left you alone before because it is very obvious you lack the ability to write and understand english language as well as knowledge in paleontology, computation, physics and mathematics in general, as well as lacking the ability of tracking valid sources and reading them since you literally limit yourself at citing the main articles in Wikipedia without checking the references or the methodology used, and not even on which specimens each mass estimate is done.

69 metric tonnes is one of the estimates listed in Carballido et al 2017, the one obtained using an allometry regression based on limb bone circumferences, but the paper actually did a volumetric model and a convex hull as well. The convex hull mimimum mass is 44 tonnes; the +21% model which is what better adjusts to modern day taxa is 55 t, and the máximum model which is baiscally as corpulent as the animal could have posibly been considering the dimensions of the bones is 77 tonnes, therefore his estimate is very much posible, furthermore we took the time to scale the whole animal and it has some proportional differences with how the animal was originally mounted; for example a shorter neck and tail.

The mass estimate you see here has been produced by us, in a similar (sometimes better) way in which it is produced by other people; we don't pull it out of our ass; I did first a MATLAB script and now a Python one in order to analyze multiview skeletals to produce a volumetric estimation with GDI analysis. Maybe you could understand it reading this post: svpow.com/2011/01/20/tutorial-…
(It also explains that allometry estimates are more prone to failure tan volumetric methods, sometimes you might be interested on since the higher masses you often quote from Wikipedia for quadrupeds are obtained using allometric regressions that usually overestimate the masses of quadrupeds, as happened with Dreadnoughtus and Stegosaurus rsbl.royalsocietypublishing.or…rsbl.royalsocietypublishing.or… ).

TL DR; if you don't know what you are talking about, don't go out there "correcting" people who knows better.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Dec 23, 2018
REKT. Just like you wrecked me a while ago about the weight of the same animal. :P
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:iconforbiddenparadise64:
ForbiddenParadise64 Featured By Owner Dec 22, 2018
Might want to call an ambulance, we have a report of 3rd degree *burns* here. 
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:iconmark0731:
mark0731 Featured By Owner Nov 20, 2018
There are different estimates. That's his estimate.
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:icondeinocheirusmaster:
deinocheirusmaster Featured By Owner Sep 12, 2018  Hobbyist Traditional Artist
Can I use this as a reference for a drawing I want to make on this dinosaur?
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:iconrandomdinos:
randomdinos Featured By Owner Sep 12, 2018  Hobbyist Traditional Artist
Sure.
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:iconrandomdinos:
randomdinos Featured By Owner Sep 12, 2018  Hobbyist Traditional Artist
Sure.
Reply
:icondeinocheirusmaster:
deinocheirusmaster Featured By Owner Sep 12, 2018  Hobbyist Traditional Artist
Thank you. Hopefully, you like my drawing of it. 
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:iconjakesutton7:
JakeSutton7 Featured By Owner Sep 3, 2018  Hobbyist General Artist
So what happened to depicting Titanosaurs with the Alamosaurus' cone shaped osteoderms? 
It was very common now you don't see it anymore 
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:iconrandomdinos:
randomdinos Featured By Owner Sep 3, 2018  Hobbyist Traditional Artist
There's one lognkosaur (Mendozasaurus) with osteoderms preserved, and they don't look like those of Alamosaurus, so phylogenetic  bracketing gives the group different osteoderms. The status on basal titanosaurs and other groups isn't very clear.
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:iconpcawesomeness:
PCAwesomeness Featured By Owner Sep 3, 2018
Very nice!
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:iconijreid:
ijreid Featured By Owner Sep 2, 2018  Hobbyist Digital Artist
Nice ilium
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:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
Yeah, it's pretty derpy
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:iconkester14:
Kester14 Featured By Owner Sep 2, 2018  Professional Artist
yes, another version keep it up make triceratops prosus or maybe alamosaurus next?
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:iconpraearcturus:
praearcturus Featured By Owner Sep 2, 2018
not to sound ostentatious at all but in english the decimal-point is a full-stop or period '.' rather than a comma ',' as it is in the romance-languages
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:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
Alright, fixed
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:iconspinosaurus14:
Spinosaurus14 Featured By Owner Sep 2, 2018
Really not that impressive in size, but probably because my mind has been oversaturated with 70t plus sauropods.
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:iconmajestic-colossus:
It really isn't. But I guess shoulder height could be a little bit more impressive for the biggest specimen. At least that's the case with almost every other reconstruction I've seen, which show an SH of ~5.3-5.5m at the top of the scapula (here it is barely 5m). It may not seem lile much, but that makes a noticeable difference.
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:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
Which other reconstructions are you talking about? The only skeletals I've seen are mine and :iconjonagold2000:'s, as well as the paper's. None of them suggests a noticeably larger height to the scapula when scaled to available measurements.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Sep 2, 2018
www.deviantart.com/spinoinwond…

The fig.1 in the paper is nearly 6m at the shoulder (scapula). Stephen O'connor (Steveoc86 on DA) used the paper's skeletal as a reference for his wikipedia chart and got similar results.

Jona's was about 5.2 - 5.3m, IIRC.
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:iconsteveoc86:
Steveoc86 Featured By Owner Sep 2, 2018
When I scaled Fig 1 to the scale bar, the measurements just didn't work and it was too large, so I think I ended up scaling it to scapular and femur length. But Yeah, Fig1 isn't very reliable.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Sep 2, 2018
Yes, the Patagotitan skeletal of the paper seems too tall.

I thought Patagotitan was over 5m at the scapula, but now I'm just confused. I'll check the measurements again as soon as possible.
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:iconsteveoc86:
Steveoc86 Featured By Owner Sep 2, 2018
I'm tempted to update the wikipedia chart to this reconstruction, assumung randomdinos would be ok with that, but part of me wants to wait until more is published.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Sep 2, 2018
This skeletal might be about as good as it gets with current material. You'll have to update your chart regardless, neck and tail seem too long.
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:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
The paper's reconstruction is 37m long with a short tail and most of the elements are oversized.  I'm not sure why SpinoinW reconstructed the forelimb of MPEF-PV 4000 as longer than that of MPEF-PV 3999; as far as I know the only overlapping limb bone is the femur, which is shorter in 4000.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Sep 2, 2018
Fair enough. Btw, have you ever thought of making a Notocolossus and a Paralititan? There is a shortage of good references for those two.
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:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
I was making a Paralititan a long time ago, but it felt quite forced to have the measurements making sense together, and I ended up losing the xcf; Notocolossus may be a good idea for a schematic, though.
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:iconbatavotyrannus:
Batavotyrannus Featured By Owner Sep 2, 2018  Hobbyist Digital Artist
fuck it
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:iconthedinorocker:
thedinorocker Featured By Owner Sep 2, 2018
Amazing! 
You  lied to me or have access to new pictures ?:)
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:iconrandomdinos:
randomdinos Featured By Owner Edited Sep 2, 2018  Hobbyist Traditional Artist
Thank you! Neither, I later changed my mind and decided the condyle issues were worth building a new tail; after the tail naturally came the rest...

It will indeed still be updated if better pictures, and of more bones, are available.
Reply
:iconthedinorocker:
thedinorocker Featured By Owner Sep 2, 2018
Stilo the best restoration of the Taxon out there...
And Now I ma even less sure it s a different species from Argentinosaurus...
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:iconmark0731:
mark0731 Featured By Owner Edited Sep 4, 2018
I'm pretty sure it's different.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Sep 1, 2018
Amazing update, it keeps getting better and better! I bet Argentinosaurus will be in the range of 32-34m.
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:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
Thank you!
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:iconmajestic-colossus:
Is the ribcage still the same size? Would you happen to have a dorsal view?
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:iconrandomdinos:
randomdinos Featured By Owner Oct 11, 2018  Hobbyist Traditional Artist
Same dorsal view as the old version, cdn.discordapp.com/attachments…
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:iconmark0731:
mark0731 Featured By Owner Sep 2, 2018
My guess would be 32.2 m.
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Sep 2, 2018
Yeah, you're right. It seems like it is always about 13% longer than Patagotitan.
Reply
:icon105697:
105697 Featured By Owner Sep 1, 2018
Nice!
Reply
:iconrandomdinos:
randomdinos Featured By Owner Sep 2, 2018  Hobbyist Traditional Artist
Thanks!
Reply
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