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DrScottHartman — Toothless Wing
Published: 2012-08-26 19:03:13 +0000 UTC; Views: 10458; Favourites: 199; Downloads: 0
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No, I haven't finally gone mad; I was commissioned to do two pterosaurs as part of a larger project I'm working on. The first is Pteranodon longiceps, which in many ways is the quintessential pterosaur to my mind. I've posed it taking off from the quad-launch position at a fairly low energy angle of attack (i.e. a leisurely takeoff, not one used when a theropod is bearing down on you).I'll probably be adopting this as a pose for any future pterosaur reconstructions I do, along with the convention of using 75% gray for the wing membranes. That said, I don't have any current plans to explore pterosaurs beyond this and the one coming next week at this point in time; luckily you already have some excellent pterosaur paleontographers on DA and the web.
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Comments: 58
It's updated on his website:
www.skeletaldrawing.com/non-di…
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The gray skin between legs need to be update like the new version in your website!
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brother Scott!
you have new versions about Pteranodon in facebook that the skin near tail is different. please add your new version to your gallery in deviant art.
palease pay attention to an issue. all of people cannot see facebook because some limitations but all of people can open deviantart!
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Actually, if you really want to make sure you have the most up to date version you should always go to my website and check the skeletal galleries - I update those first, and DA if I have time.
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Dear Scott
John Conway told me your imagination about membrane between legs are mistake....What is your opinion????
jconway.deviantart.com/art/Pot…
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There are several opinions on this, but to my knowledge there isn't a single conclusive specimen. I'm not overly attached either way.
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There is a new version of my Dimorphodon:
[link]
[link]
I try to correct my illustration again according to several advice by my friends....... I would like to acknowledge Alan from Australia([link], Asier Larramendi (from Basque Country), Scott Hartman (from USA), John Sibbick (from England) , Dr. Mark Witton (from England) , Dr. Mike Everhart (from Kansas, USA), Dr. Dmitry Bogdanov (from Russia) ,David Peters (from USA) , and Sergio De la Rosa (from Mexico) for their scientific advice and guide about Dimorphodon (head size, size scale bar, caudal and pectoral vertebrae, launch position, pubic and pre-pubic,...)
Best wishes for you and your family, Amin
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Dear Scott! Thank you for your answers…every time, you answer me, I find new imagination about anatomy.
John Conway reject Pteranodon trunk of other artists(Bennett, Paul, Hanson, Claessens) and then he show us his new model….however, I think Eaton(1910) drew his Pterandon trunk according to fossil documents because Dr. Mike Everhart use just scientific pictures in his website….
1- I am surprised Why John forget show us other views of his models…. I am surprised if we have fossil Document, Why did every artist create a different shape of trunk for Pteranodon????
2- John forget to speak about your model…your Pteranodon Trunk is different of John Conway art and like to Claessens….Why? Why did not use Pteranodon Trunk of John Conway? Do you find new information?
3- I am going to drew a new skeleton model about Pteranodon..it will be my second illustration about skeleton… but with a 3D position…yes a 3D position for take off…shape of pectoral girddle is very important in such position…your Pteranodon is one of my references….after that I drew it, I will send your gmail….other artists (except John Sibbick) never drew a 3D position about Pterosaur skeleton…. Mark Witton indicate the center of gravity below the wings for Pterandon…but I need to more pictures about pectoral girdle (Sternum shape , angel of Scapula and Coracoid) in 3D position…if you can draw a line sketch about ventral or Dorsal view of Sternum (according to lateral view of your art or Jon Conway) , please send to my Email….
keyvan_1878@yahoo.com
Iranian biologists or geologists did not interesting to Prehistoric reptile….they think it is useful for children and it is not good for universities….I think different of them….Iranian culture is not advanced for understanding importance of paleontology….I wish I born in USA….Therefore, My art never be useful for me in a country like IRAN but I think it may be useful for Science development in future….. you, Bennett, Paul, Hanson, and others gave me new imagination about Pterosaurs and I like to continue your goal!
……my dear friend, Scott, if you have every suggestion about my art, please tell me!
Pot-bellied Pteranodon
[link]
If we combine a (keel-less) ventrally sloping sternum, and make the ribcage and scapulocoracoid shallower as I think they ought to be, we end up with a different sort of shape for Pteranodon's trunk. A distinctly pot-bellied one.
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I am mostly in agreement with John Conway on the torso, including rib depth, but in terms of the height of the scapula/coracoid and the shape of the sternum I came up with something somewhat intermediate between his work and Classens et al 2009 reconstruction.
Overall the differences are rather small compared to previous reconstructions.
Unfortunately I don't have any time to spend working on pterosaurs right now, as I'm backed up trying to finish work on dinosaur projects (and a marine reptile one).
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Why did Dr. Sankar Chatterjee disagree with quad-launch posture?
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To be blunt, he seems to be using outdated assumptions related to mass and power in flight. You can read a more detailed response here: [link]
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I'm a bit baffled by this and almost all other common restorations of male P. longceps... I can't find any references for complete or even nearly complete bills in adult male P. longiceps, but the bills of some P. sternbergi and the type of Dawndraco all seem to have ridiculously long, concave bills, and the known skulls of P. longiceps don't look inconsistent with that. Any reason P. longiceps is usually reconstructed the way you (and pretty much everyone else) have done, with a relatively short, stout bill and not like this?
[link]
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Ok, in all seriousness the bill consistent with the Sternberg Memorial Museum specimen 11402, although it's still missing much of the length of the bill. So I wouldn't consider it "wrong" to put the more Dawndraco-like bill on it, but I don't really find it necessary to do so either. Hopefully more specimens will clarify at some point!
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Eaton does describe a nearly complete pre-orbital rostrum for what is now longiceps (I think), while Bennett's thesis shows another. The specimen is almost single-handedly responsible for the details in the skull in Scott's skeleton.
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Yes, I relied quite heavily on Eaton and Bennett's papers (and the latter's thesis).
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It's a conspiracy. Oh no, I've said too mu...
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I think I need to read some more scientific papers or something, because I have no idea what's going on with pterosaur phalanges anymore. What is that barb pointing back toward the body? (the one distal to the radius/ulna)?
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The pteroid bone. It supported the wing membrane that was in front of the elbow, allowing the animal to control the shape of the leading edge during flight.
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Is there a reason why you've chosen to attach the wing membrane where you have? It looks like you've gone for a hip attachment, (although its hard to tell in a schematic illustration) which I understand is not considered likely.
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I've gone for thigh attachment - since the wing is not fully extended I assumed that it wouldn't be completely taught, but perhaps that's confusing and I should add a more obvious connection - I'll take it under consideration.
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Well, that's still amazing. Wondering what is the other one.
Oh well. Still, it's beautiful.
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Oh wow, the only obscured thing are some rib segments without anything of note; great pose indeed!
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Yeah, and I actually feel bad about that, as I adopted a very specific arrangement of sternal ribs based on the work of Claessens et al., but it still seems like the lesser of evils.
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So, what is this, pterosaur skeletal #2 in the world?
Nice job!
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For me, but number two was a lot better than number 1.
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Now I just have to wait forever for Whitton's pterosaur book AND FLYING BEASTIES WILL BE MINE. Ish.
Lovely restoration, too
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I'm looking forward to Mark's pterosaur book as well.
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Do you have an idea on when it might be published? I can't find a hair of it mentioned anywhere and I need to know when to save for it, ahah.
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I don't offhand. I think not until 2013 if I had to guess.
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Aaah, plenty of time then. Shame it was pushed that far back :c
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is there any foreshortening of the humerus?
That's an interesting decision if you're schematizing the pose like that.
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There is some foreshortening actually.
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Good thing you're not gonna do more, 'cause this is horrible!
Naw, I kid.
I do not think this posture is a good one to adopt on a regular basis. You're not showing other skeletons in "leap" or "jump" positions. I'm thinking the quad-walk posture should be pretty easy to standardize. One question, though, is how to handle aquatic taxa.
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Actually, I did a quad-walk posture pterosaur years ago (I think it was 2003) and actually that's a lot harder to do without obscuring the anatomy. I've more or less given up on posing pterosaurs in a way that would work for other animals, so I think I'll be sticking with this (whenever I should do more). Also, I like that it's dynamic, yet also unremarkable - it's something that all pterosaur species would have done, usually several times a day.
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After preparing a figure for a paper, I think I am gonna jump on this: take your avante and make it a Bandwagon.
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Sounds good! Even if we can't get to a standard for dinosaurs we may as well get one for pterosaurs
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THIS. IS. AMAZING.
No, seriously. Amazing. I know that we have paleontographers that do pterosaurs on the web, but this is the first time I have seen a plausible, realistic skeletal reconstruction using modern theories on pterosaurs. I think this should be the new "standard" for how to do reconstructions, as you not only show all the bones without them being too obscured, but you have also successfully shown these creatures in an accurate pose, without sacrificing how and where the wing flaps attach. PLEASE PLEASE PLEASE do more like this.
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I promise to do a least one more
But thanks, I appreciate the vote of confidence
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Yeah, I've avoided pterosaurs as much as possible, especially given how few three-dimensional specimens were available to clarify anatomical debates back in the 1990s when I was getting started. And now that a lot of those controversies are cleared up Mike Hanson and John Conway do such a great job that I don't think there's much need for my services in wing-finger land.
That said, it's always fun to do a new group, although I wish Bennett had been a bit more concise in his thesis, as that was a LOT of reading (and some skimming).
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