Just curious to know if it is physically possible to have such a sharp head turn on the animal? When you are looking at its skeleton ([link]), although the neck is disarticulated, you would notice the neck of the animal appears to be a bit shorter than what has been depicted. I can't find a side view of the neck vertebrates of the animal, so I've picked another "primitive" ceratopsian (psittacosaurus) as my example (assuming that their general neck morphology is very similar). Psittacosaurus has a similar head to neck ratio as your animal (if not then probably Psittacosaurus has an even longer neck, [link] , [link] , [link] and [link] .). If you look at a close up of the neck on the Psittacosaurus ([link]) , You'll find the way it was constructed makes it rather difficult for a psittacosaur to bend its neck 90 degrees using its neck alone (slightly overlapping neck ribs and probably rather short (neck) to allow it to flex that far). I'm not so sure whether what you have is "naturally" possible. (of course, you or yoult might have some close up shots of the actual neck vertebrates of Yinlong, and decided that is the right length or the possible curvature of it before disarticulation happens) ?
Well, I see were you're comming from and you might be right with your assumption. It's either way a perspective-error I did here or probably I were distracted by the relative long necks of derived Neoceratopsia. The lack of an actual good skeleton took it's part into it as well. Nonetheless thank you for the constructive critique and the support with references.
I would think it is fair to say that we actually do have good material for this animal (Yinlong, [link] , it wasn't very distorted, rather complete and only the distal part of its tail is missing) but sadly we just didn't have more pictures of the animal in different angles.
Also "if" this animal's neck is based more or less on the derived neoceratopsians, it could be slightly more problematic in your illustration, since in most if not all neoceratopsians (except for maybe protoceratops, juvenile stages) the first few cervicals (three or four) are fused and forms a syncervical, even if these elements are not fused together these elements are very much immobile ([link] , [link] and [link] . I didn't use anything more derived neoceratopsians as examples because proportionally they are drastically different.). If such structure (syncervical) is present then your animal would have quite a stiff neck proximally (ceratopsids generally have 10 cervicals altogether and about one third of them are "fused".) which would make bending 90 degrees of its head more difficult. I probably haven't seen enough ceratopsians specimen (either photos or mounts) because I can't think of a derived neoceratopsian that has relatively long neck (I have a quick search on the web, maybe you are thinking about animal like this one [link]) however, if you look closely you will find that just like the other neoceratopsians , about a third of its neck is fused, and the head on this mount doesn't really attached to its neck. Perhaps you have a better example somewhere unfortunately I just couldn't find it on the web...
Ah, I see , besides since this is just an art forum anyway so accuracy shouldn't be the focal point here, you should probably just ignore my previous comment on the neck.
It's either way a perspective-error I did here or probably I were distracted by the relative long necks of derived Neoceratopsia. The lack of an actual good skeleton took it's part into it as well.
Nonetheless thank you for the constructive critique and the support with references.
Also "if" this animal's neck is based more or less on the derived neoceratopsians, it could be slightly more problematic in your illustration, since in most if not all neoceratopsians (except for maybe protoceratops, juvenile stages) the first few cervicals (three or four) are fused and forms a syncervical, even if these elements are not fused together these elements are very much immobile ([link] , [link] and [link] . I didn't use anything more derived neoceratopsians as examples because proportionally they are drastically different.). If such structure (syncervical) is present then your animal would have quite a stiff neck proximally (ceratopsids generally have 10 cervicals altogether and about one third of them are "fused".) which would make bending 90 degrees of its head more difficult. I probably haven't seen enough ceratopsians specimen (either photos or mounts) because I can't think of a derived neoceratopsian that has relatively long neck (I have a quick search on the web, maybe you are thinking about animal like this one [link]) however, if you look closely you will find that just like the other neoceratopsians , about a third of its neck is fused, and the head on this mount doesn't really attached to its neck. Perhaps you have a better example somewhere unfortunately I just couldn't find it on the web...
I'll ask Yoult