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:icontheropoda: #theropoda
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We blur science and sci-fiction.

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June 6, 2008
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:iconscotthartman:
Finally! After an eternity of revisions and attempts to reconcile the proportions of specimens of different ages that frequently didn't overlap, I feel confident I've nailed the general proportions.

With generous aid from several people ("credits" below) I figured out that the legs weren't actually too short in my original skeletal - in fact I ended up making them too long in my most recent attempt. Instead, the vertebrae and ribs based on UA 8678 (that would be the cervicals, dorsals, sacrals, and 5 anterior caudals) were scaled up too large.

That's an important distinction, as scaling them down had a chain-reaction on the relative size of the head, pelvic and pectoral girdles, etc.

It's still a strange and somewhat low-slung theropod, but nothing like my previous attempts. I should note that there weren't any mathematical scaling errors - rather, the way I chose to reconcile the axial series of UA 8678 to the larger tail and head of FMNH PR 2100 was wrong (the latter has proportionately taller neural spines, which is probably an ontogenetic feature).

Obviously newer data could require some nips or tucks, but I honestly think you are safe to illustrate Majungasaurus now. I know I plan to!

Special thanks (in alphabetical order) go out to Matt Carrano, David Krause, Adam Pritchard, and Scott Sampson, all of whom who provided excellent critiques and made this version possible (not to mention the research and publications the restoration is based on).

Now I'm going to go find a bottle of champagne to pop...
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:iconpiche2:
Critique by ~piche2 May 30, 2012, 5:58:04 PM
Tras ser conocido por numerosos cráneos y esqueletos bien preservados, el Majungasaurus ha llegado a ser uno de los dinosaurios terópodos más estudiados del Hemisferio Sur. Aparentemente estaba más relacionado con los abelisáuridos de la India que con los de Sudamérica o África continental, lo cual tiene importantes repercusiones biogeográficas. El Majungasaurus era el superpredador de su ecosistema, cazando principalmente saurópodos como el Rapetosaurus, y siendo también el único dinosaurio del cual hay evidencia directa de canibalismo.Aunque los brazos no disponen de mucha evidencia, se reconoce que estos eran muy pequeños, mientras las patas eran largas y robustas me gusta.
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:iconrobosawrus:
~robosawrus Mar 18, 2013  New member
I dont know if this helps, but this is a common problem when dealing with composite skeletons that consist of differing ontogenetic ages. My solution involved the dimensions of the centra of the overlapping portions of the common elements of FMNH PR 2100 and 8678. after everything was at the same scale, i came up with two reduction ratios one was centrum height, one was centrum length. I then superimposed the vertebrae accoding to each parameter and noted what was different, larger, thicker, taller, etc. I ended up going with the cntrum length ratio. I then modified the remaining FMNH PR 2100 vertebrae to backdate them ontogenetically based on the changes seen in the superimposed common vertebrae.

I filled in the space underneath and between the articulations of the haemeal arches, added mass to the tops of the neural arches, and increased the height of the neural spines and their width at the base. This recreates what I beleive would be these vertebrae in the ontogenetic state of the younger animal. Centrum dimensions seem to be more conservative measurements for this purpose than measurements of any other part of the vertebra.
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:icondobermunk:
~dobermunk Mar 2, 2013  Professional Filmographer
those legs... are so ... underwhlemed.
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:iconscotthartman:
*ScottHartman Mar 2, 2013  Professional Digital Artist
Yes they are. It's a really strange animal.
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:iconruleroflions:
~RulerOfLions Sep 12, 2012
Were it's legs really that short?
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:iconscotthartman:
*ScottHartman Sep 12, 2012  Professional Digital Artist
They really were. I can now say that with a bit more certainty than before.
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:iconruleroflions:
~RulerOfLions Sep 24, 2012
Then that would mean it couldn't run very fast. Probably not more than 15 mph.
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:icondinosaurusbrazil:
~dinosaurusbrazil Jun 1, 2012  Hobbyist Traditional Artist
Majungasaurus was an interesting abelisaurid, because his legs were much short, probably, because they ate sauropods, so they didnīt have to run much fast to catch his food, but, other abelisaurids, like carnoturus, could be fast runners, so it makes me thinking what carnotaurus ate...
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:iconsupergoji18:
~supergoji18 Jun 1, 2012  Student Traditional Artist
it seems that the longer/larger the neck/head is on a predator is, the less necessary arms become.

Needless to say, i feel bad for these guys. If they had an itch on their head, then what? XD
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:iconscotthartman:
*ScottHartman Jun 1, 2012  Professional Digital Artist
Rub it against a tree I imagine. :)
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:iconsupergoji18:
~supergoji18 Jun 2, 2012  Student Traditional Artist
XD forgot they could do that.
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