Deviation Actions

DrScottHartman's avatar

Nothronychus graffami

The second species of Nothronychus, this one known from a more complete skeleton.

Edit: Updated the silhouette (darn those withers and their attendant neck thickness increases!) while also adjusting the stance ever-so-slightly.
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© 2010 - 2021 DrScottHartman
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Evodolka's avatar
stands up like a death penguin
Blade-of-the-Moon's avatar
Hey Scott, do you by any chance know of any overhead views of any Nothronychus? I'm guessing it's not nearly as wide as say Therizinosaurus?
soulsreach's avatar
I have a question, looking at this and similarly-shaped dinosaurs. They look quite heavy, and yet their feet/legs are always so small and delicate. How did they support their weight like this for extended periods of time?
Dawley's avatar
I love therizinosaurids. Excellent work!
DrScottHartman's avatar
Thanks, I'm fond of them as well.
CarlosAshgalde's avatar
Do you think Therizinosaurs had a slow metabolism like sloths? Personally I'd say they had the guts for it.
DrScottHartman's avatar
I wouldn't be surprised, but this is a question we really shouldn't have to speculate on - someone needs to do histological work on both therizinosaurs and giant sloths.
ZEGH8578's avatar
Now, this one I actually do have a hard time seeing balanced, like that. Wouldn't it have to be even more vertically posed, so not to fall on its face? The tail seems to offer next to no counter-weight, even the belly is positioned in front of the pelvis, and would pull it forward, at least from what it looks.
DrScottHartman's avatar
It helps to see it in 3D (like in a skeletal mount). The belly is widest just in front of the pelvis, and the guts continue into the pelvis on these guys. As a result the CoG should be almost exactly where the front foot is placed (remember it's walking, so it's not in perfect static equilibrium).
PeteriDish's avatar
is it me or did these dinos try really hard to walk like us? :rofl: the more therizinosaurs I see the more weirded out I am by how "vertical" they seem to be... XD
DrScottHartman's avatar
I would have said they tried hard to walk like giant ground sloths, but yes, they seem to have gone vertical as much as they could.
that analogy makes a lot of sense to me- I believe that ground sloths, therizinosaurids, and perhaps prosauropods follow a very similar body plan due to fulfilling the same ecological niche. I wonder if someone has taken the time to name such specific niches?
PeteriDish's avatar
TitanoRex's avatar
so could therizinosaurs actually "slash" or claw like so many documentaries presume?
DrScottHartman's avatar
It had a decent range of motion with the arms, although they couldn't reach far in front of them, so they'd have had to slash at predators sort of obliquely.
Godzillafan1987's avatar
Just be a tornado, Nothro.
Thewhiningrhino's avatar
This is hands down one of my favorite weird-a$$ dinosaurs. :crazy: Just looks like something Lewis Carrol would make up! :lol:
DrScottHartman's avatar
I have to agree. Although as more of the asian species get better described I think Nothronychus will end up looking pretty normal for the group (although the group is still weird as heck).
Yapok96's avatar
Ooh! I might use this for a 3D model or something later. BTW, I've heard some stuff about Therizinosaurids being plantigrade based on some foot prints, could you shed some light on the subject?
DrScottHartman's avatar
In short...no. Like all digitigrade animals they could probably crouch on their ankles if they wanted to, but there's no way they could take a normal stride like that; the knee would have to be dramatically modified, and having seen several I can say they aren't.
PWNZ3R-Dragon's avatar
Awesome pic! Question about therizinosaurs though: Were they really that upright? O_o
DrScottHartman's avatar
It's still a matter of some debate, but having seen the specimen up close the pelvis is modified in countless ways to accommodate such a pose...but the simplest way to convince yourself is to just picture the animal with its back horizontal...it would fall flat on its face without the legs protracted so far forward that it couldn't really walk (although it may have needed to adopt such a position to drink water).
Qilong's avatar
Very cool. I'd note that it looks as though you've restored the femur as though it were strictly vertical, rather that laterally splayed as the femoral caput and the clearance required for femoral protraction indicate. Is this just standard form, or am I under-evaluating your restoration?
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