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March 27, 2012
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:iconscotthartman:
Herrerasaurus is usually recovered as a basal theropod - but despite that it still has five toes, although the fifth one is reduced to a single toe bone that appears to lack a claw. The foot bone (metatarsal) of the first toe also extends all the way back to the ankle joint, something that is soon lost in more derived theropods (and of course in living theropods - birds).

The hand also has five "fingers", although four and especially five are reduced a lot, and wouldn't have been obvious in the living animal. You can't see the fifth digit in side view, as it actually attaches to the palmar side of the hand.

This reconstruction isn't radically different than previous authors' attempts, so I don't think there's much exciting or controversial in this one, even if I try to make it sound that way.

Update: Just some minor changes to the silhouette I made a few months ago.
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:iconarchanubis:
*Archanubis Mar 25, 2013
Great work as usual! One of my favorite Triassic Dinos. :)
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:iconeriorguez:
~Eriorguez Mar 30, 2012
Heh, I wanted to see this guy done by you after seeing Eoraptor and the other basal saurischians, to see how they compared... Anyway, I've always found the skull of this critter quite unique, and a bit un-dinosaurian. May I ask if we will be seeing a Coelophysoid in the near future?
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:iconscotthartman:
*ScottHartman Mar 30, 2012  Professional Digital Artist
You'll probably see Tawa before a coelophysoid, but eventually. I do want to fill in more of the stages on the path to tetanurans, but I will be turning to "prosauropods" first, as I think the evolutionary transition from theropod-like animals to true sauropods is both easier for laymen to understand, and woafully under-serviced by skeletal drawings.
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:iconpilsator:
~pilsator Mar 30, 2012  Hobbyist Traditional Artist
Amazing news, Scott :)
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:iconscotthartman:
*ScottHartman Mar 30, 2012  Professional Digital Artist
More on that in a couple weeks ;)
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:iconnemo-ramjet:
~nemo-ramjet Mar 28, 2012
The GSP version of this had a very deep pubis & a shorter neck - which sources did you use for this reconstruction? I agree with the comments above, something very strange was going on with the hands... (Memories of "herraravians" etc. :P)
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:iconscotthartman:
*ScottHartman Mar 28, 2012  Professional Digital Artist
Actually, your eyes are deceiving you - the pubis on Greg's is shorter. It just looks longer because he enlarged the pectoral girdle and then made the gastralia extend horizontally before arching strongly downward into the pubis. Also, the necks are identical in length, but the dorsal column is longer on mine, so it's actually proportionately shorter on mine, not Greg's.

When I finish a skeletal I always check it against all other versions to see where the differences are.
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:icontomozaurus:
~Tomozaurus Mar 28, 2012  Student General Artist
Interesting. The neck looks a little longer and head smaller than previous skeletal I've seen. Is this actually the case, or is it something else that's making it look that way?
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:iconscotthartman:
*ScottHartman Mar 28, 2012  Professional Digital Artist
Looks can be deceiving. The head and neck are identical in length, although the body is a bit longer (and deeper) on mine, so in that sense the head is proportionately smaller, but mostly I think that illusion is caused by how much deeper the body cavity is on my reconstruction - our brains do a rough comparison against surface area, since it's a 2D drawing.

The neck is actually proportionately smaller on mine than it is on Greg's (to the exact same degree as the head, for the same reasons) but again it's by a small degree. The neck is substantially thicker in my reconstruction, as I restore the neck muscles and the room for the trachea and the esophagus differently, so maybe once again your brain is seeing more surface area in the drawing and filling in "longer"?
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:icontomozaurus:
~Tomozaurus Mar 28, 2012  Student General Artist
Indeed they can be. Yes, measuring them up side by side, it would seem that the deeper body cavity of yours is making me see the neck as longer somehow. Interesting how the human brain works.
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