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Walker's heavy claw (2018) by ScottHartman Walker's heavy claw (2018) by ScottHartman
2018 Update: Some more revisions in preparation for tackling other spinosaurids (hopefully!) in the coming year. I've decided that there is probably less missing from the incomplete femur (missing a section out of the middle) than before, which brings the femur more into line in terms of how robust it is relative to its length. I updated the scaling of the incomplete lower limb elements to reflect his. I also updated the vertebral column somewhat, reducing the rate at which the neural spines increase in height in the mid-posterior dorsals. Along this line, I've seen some internet hacks of my skeletal (note: please don't hack up or modify my skeletal reconstructions and post them!) that restore the last dorsal as having a very short neural spine; the neural spine of the last dorsal is obviously broken and is clearly labeled as such in the classic Charig & Milner description, so there's no reason to try and force it to have a really short neural spine. Finally, I've raised the neck a bit - not due to any changes in the anatomy, but to put it more in line with the semi-flexed pose I use on other theropods, and because I think it will make a more useful comparative pose in its relatives. For posterity I've left the previous updates below.


2016 Update: I updated the presacral series to reflect the new identifications of Evers et al. 2015 in their Sigilmassasaurus description. This has the effect of putting a stronger S-curve back into the neck, but it still leaves us with a hangdog angle for the skull. Interestingly, the neural spine morphology suggests the building up of axial muscles or nuchal ligaments (or both) along the back of the neck and front of the dorsal column, which is not unlike what Andre Cau has suggested for Spinosaurus, and would make it analogous to what we see in Deinocheirus as well (but on a smaller scale than either of those taxa).

2015 Updated: After nearly a decade and a half here is the overhauled skeletal. The overall proportions aren't all that different, but some of the details are. The midline crest has been moved back above the lacrimal, and I can now confirm that the odd downcurving neck seems to be a real thing, although it also uses some upwardly deflected almost cervicalized anterior dorsals to achieve it. The gray portion of the ilium is the part that was preserved as an imprint (i.e. there is no surviving bone from those parts) and so its accuracy depends entirely on the observations of the original excavators.

Original description: Baryonyx wasn't the first spinosaurid found, but it went a long ways in clarifying what these sorts of theropods looked like and ate. And it turns out they ate fish - although like modern crocodilians, Baryonyx almost certainly ate anything else it could get a hold of too (both fish scales and iguanodont bones were found in its stomach).
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:iconaction-figure-opera:
action-figure-opera Featured By Owner May 2, 2018
I noticed that if one were to omit the crests from the skull of dilophosaurus, it would be long and slender like a spinosaurid. Dilophosaurus also has the same kind of snout as a spinosaurid, with the adapted notch for catching fish. Is dilophosaurus related to spinosaurids, or are these features just examples of convergent evolution?
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:iconscotthartman:
ScottHartman Featured By Owner May 3, 2018  Professional Digital Artist
Greg Paul noticed these things as well, and suggested in the 1980s that it might mean they were close relatives. But a large amount of data suggests that it is convergence, as Dilophosaurus is a much more primitive theropod in other anatomical respects.
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:iconmark0731:
mark0731 Featured By Owner Apr 29, 2018
I don't like the new pose to be honest, but it's great work nevertheless.
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:iconwhitedragon66:
Whitedragon66 Featured By Owner Apr 29, 2018
um this is baryonyx skeleton correct
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:iconphiloceratops:
Philoceratops Featured By Owner 3 days ago  Hobbyist General Artist
Yes, it is. Scott Hartman is pretty reliable when it comes to these...
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:iconameban:
Ameban Featured By Owner Apr 11, 2018  Professional General Artist
Checking your works about the Theropoda family, I've noticed Spinosaurids have the most masive hips of the family. However, their skulls are pretty lighter than Carnosaurua or Tyranosauriade members.  Of course, lesser members of this family have lighter structures.

Do you think there is a conexion between the skull size and the hips size? 
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:iconjes86:
JES86 Featured By Owner Apr 13, 2018
Hmmm.  I actually don't see that at all - I would say tyrannosaurs have the most massive hips - even in the profile.  In dorsal (from the top) views that are available, this is emphasized even more.
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:iconameban:
Ameban Featured By Owner Apr 13, 2018  Professional General Artist
Oh! I understand what you say, but I think I didn't explained myself well enough. I didn't mean the hip bone, but the hip-arc. For some reason, this family has long crests over the spine, and here, you can see the hips are higher than the shoulders, unlike other Theropoda members, such as the Megalosaurs here:  This IS your (great?) grandfather's theropod by ScottHartman , where you can see the shoulders and hips are place at same level.
I just wondered why such difference. Is it related to the skull size? The locomotion? Habitat? 
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:iconjes86:
JES86 Featured By Owner Apr 16, 2018
Perhaps it's an adaptation for fish hunting, spending a lot of time poised over streambeds and such.
Form fits function.
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:iconjes86:
JES86 Featured By Owner Mar 14, 2018
How do the dorsal views of spinosaurs compare with each other?
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:iconmesozoic0906:
Mesozoic0906 Featured By Owner Feb 10, 2018
Some more revisions in preparation for tackling other spinosaurids (hopefully!) in the coming year. ”

So.. Wait for 2019?
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:iconscotthartman:
ScottHartman Featured By Owner Feb 19, 2018  Professional Digital Artist
That's the goal.
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:iconkirkseven:
kirkseven Featured By Owner Jan 20, 2018
Nice!
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:iconspinosaurusdinosaur:
SpinosaurusDinosaur Featured By Owner Jan 18, 2018  Hobbyist Digital Artist
Very lovely! Still awesome to me~
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:icondeinonychusempire:
DeinonychusEmpire Featured By Owner Jan 18, 2018  Hobbyist General Artist
Alas, come June 22 this beautiful creature will no longer be known for what it really was.
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:icongigaboss101:
GigaBoss101 Featured By Owner Apr 2, 2018  Hobbyist Traditional Artist
FUCCCCCCCCCKKKKKKKK.
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:iconalternateprehistory:
AlternatePrehistory Featured By Owner Jan 19, 2018
Why?
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:iconmesozoic0906:
Mesozoic0906 Featured By Owner Jan 19, 2018
Jurassic World 2
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:iconalternateprehistory:
AlternatePrehistory Featured By Owner Jan 19, 2018
rip
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:iconteamdinosauria21:
TeamDinosauria21 Featured By Owner Jan 18, 2018  Student Digital Artist
Amazing :)
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:iconshinreddear:
ShinRedDear Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
I am constantly surprised by how what could be seen a minor re-adjustments can change our perception of the overal skeleton! This new 2018 is all kinds of strange, reminds me more of a big heron/swan than before! Thank you for helping us improve our understanding of extinct animals!
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:icondinosaurlover83:
Dinosaurlover83 Featured By Owner Jan 18, 2018  Student Artist
Noice. Glad to see more skeletals from you, Scott.
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:iconalternateprehistory:
AlternatePrehistory Featured By Owner Jan 18, 2018
Looking awesome!
What are the measurements you're basing the dorsal vertebra on? They seem a bit longer than in the original description.
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:iconrobertfabiani:
robertfabiani Featured By Owner Jan 18, 2018  Professional Digital Artist
always good to add alil extra beef always
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:iconalternateprehistory:
AlternatePrehistory Featured By Owner Jan 19, 2018
?
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:iconscotthartman:
ScottHartman Featured By Owner Jan 18, 2018  Professional Digital Artist
 They're based on the measurements in the monograph.
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:icondinopithecus:
Dinopithecus Featured By Owner Jan 18, 2018
I once read that Baryonyx had a long, straight neck that was fairly inflexible (the opposite of what’s normal for theropods). Evidently this skeletal shuts down the idea that it was straight, but was it really inflexible?
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:iconscotthartman:
ScottHartman Featured By Owner Jan 18, 2018  Professional Digital Artist
It was probably more flexible in up and down motion than in side to side motion.
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:iconcjcroen:
CJCroen Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
IT KEEPS CHANGING!!!!!
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:icondesmodeus:
Desmodeus Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
Our understanding keeps changing.
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:iconcjcroen:
CJCroen Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
True.
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:iconpaleosir:
paleosir Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
Very nice.
Is there any reason in particular that the hallux is restored as a traditional theropod hallux, instead of the large hallux that touches the ground, as in Spinosaurus?
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:iconscotthartman:
ScottHartman Featured By Owner Jan 18, 2018  Professional Digital Artist
Because we don't know where that trait appeared - in most ways Baryonyx is a more traditional theropod than Spinosaurus (even tossing out the idea of it being quadrupedal and aquatic).
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:iconpaleosir:
paleosir Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
I guess so. Even then, aren´t there ichnites from Spain from the same time period that suggest a hallux touching the ground?
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:iconsaberrex:
Saberrex Featured By Owner Jan 18, 2018  Hobbyist General Artist
I'm guessing that they may belong to another genus.
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:iconpaleosir:
paleosir Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
Sure. That´s possible.
But that does remove reasons for keeping Bary´s hallux short.

IMO there are more reason to give it a large ground-touching hallux.
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:iconscotthartman:
ScottHartman Featured By Owner Jan 18, 2018  Professional Digital Artist
Also, the FASC specimen doesn't really establish this either - it only has a complete MT I, and a partial MT II - without knowing the length of the rest of the foot it's hard to know exactly how close of contact the first digit had with the ground (I'm not saying their reconstruction here is wrong, just that it's not a slam dunk as is sometimes implied).
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:iconpaleosir:
paleosir Featured By Owner Jan 18, 2018  Hobbyist Traditional Artist
You´re right. It´s far from established, and not certain.
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:iconkingrexy:
kingrexy Featured By Owner Jan 18, 2018  Student Digital Artist
In honor of the new jurassic movie I suppose?
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:iconscotthartman:
ScottHartman Featured By Owner Jan 18, 2018  Professional Digital Artist
In honor of needing to update it for a commission I'm doing. But the new Jurassic World movie is a nice tie in.
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:iconkingrexy:
kingrexy Featured By Owner Jan 18, 2018  Student Digital Artist
^^
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:iconmerkavadragunov:
MerkavaDragunov Featured By Owner Jun 17, 2017
excuse me but...
someone has been using this skeletal and tracing over it and claiming it as their own (basically theft)
Accurate Baryonyx Walkeri
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:iconatlantis536:
Atlantis536 Featured By Owner Nov 3, 2017  Hobbyist Traditional Artist
Not just any someone... That's Asuma17! The infamous art thief!
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:iconsekley:
Sekley Featured By Owner Apr 15, 2017
I've heard talk going around that your skeletal's vertebrae column is too large. Is that true?
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:iconscotthartman:
ScottHartman Featured By Owner Apr 15, 2017  Professional Digital Artist
Not that I'm aware of. Do you mean the neural spines over the hips?
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:iconsekley:
Sekley Featured By Owner Apr 16, 2017
I found what they were talking out. It was that your skeletal's vertebrael column didn't match the scaling from the 1997 paper.

cdn.discordapp.com/attachments…

cdn.discordapp.com/attachments…

cdn.discordapp.com/attachments…
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:iconsekley:
Sekley Featured By Owner Edited Apr 15, 2017
I might be paraphrasing this wrong, but it was something about the whole spine from the torso to the tail was too large and thus making the animal's linear dimensions too big. I'll ask them about it again because my memory isn't the best.
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:iconscotthartman:
ScottHartman Featured By Owner Apr 17, 2017  Professional Digital Artist
Ohhhh, that was years ago. When I overhauled it last year to incorporate the new positioning information from Evers et al., 2015 I also updated the scale bar, etc.
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:iconsekley:
Sekley Featured By Owner Apr 17, 2017
So this is the fixed version?
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:iconscotthartman:
ScottHartman Featured By Owner Apr 17, 2017  Professional Digital Artist
Correct.
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