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Jianchangnathus robustus skeletal reconstruction. by paleosir Jianchangnathus robustus skeletal reconstruction. by paleosir
Missing gaps filled in with Scaphognathus crassirostris material, Fenghuangopterus lii, and Rhamphorhynchus muensteri material.

References:
3c1703fe8d.site.internapcdn.ne…

3.bp.blogspot.com/-SxJVj0xljVk…

1.bp.blogspot.com/-1f1lWrlKZ8M…

upload.wikimedia.org/wikipedia…

1.bp.blogspot.com/-TG2-yJgCT0Q…

Xin Cheng; Xiaolin Wang; Shunxing Jiang; Alexander W.A. Kellner (2012). "A new scaphognathid pterosaur from western Liaoning, China"



Wingspan: 109 cm
Weight: 0,94 kg (scaling from Witton's estimate for basal pterosaur weight)
Skull length: 14cm


The carpal complex is shorter than in Rhamphorhynchus, as well as the fingers. The manual claws are robust and curved, but not very sharp. In Jeholopterus the ungual sheaths are expanded roughly 50% by keratin, and in later pterosaurs this number can be as high as 100%, but in Scaphognathus it was likely also around 50% because the claw morphology matches Jeholopterus quite closely.
The manual claws are significantly larger and more robust than the pedal claws.

The mandible is robust, more so than in any other known Scaphognathine, and the upper jaw is convex and bears 3 pairs of procumberent teeth.
The cranium is very similar to Scaphognathus, and more robust than in Harpactognathus and Fenghuangopterus, indicating a diet consisting of proprtionally big prey.
The teeth are peg-like, and more robust than in Harpactognathus.

The femur and tibia are longer proportionally than in Rhamphorhycnhus and Scaphognathus, indicating a more terrestrial lifestyle because the discrepancy between forelimb and hindlimb length is smaller.
This would allow a more upright gait, with longer strides.

The tail is for the most part not preserved, a common trend in scaphognathines, but a small mid-section is visible in the fossil.
The tail is mostly reconstructed after Hartman's Rhamphorhychus muensteri.

Gastralia are preserved, but scattered.
No sclerotic ring is visible in the fossil, and therefor it is reconstructed after Scaphognathus crassirostris.


Taxonomy:
Reptilia > archosauria > ornithodira > pterosauria > novaloidea > brevisquartossa > rhamphorhynchidae > scaphognathinae > Jianchangopterus robustus


Part of my Tiaojishan project.



This skeletal is free to use. Use it in any way you want, no attribution need (but it would be greatly appreciated).
Add a Comment:
 
:iconowlbaskingshark:
Owlbaskingshark Featured By Owner May 1, 2017  Hobbyist Traditional Artist
How wide was its skull?
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:iconpaleosir:
paleosir Featured By Owner May 1, 2017  Hobbyist Traditional Artist
Pretty wide.
Judging from the fossils, I would say about 5 to 6 cm (But the skull was preserved partly on it's side so it's hard to judge).

Width: 5.5 cm
Length: 14.2 cm
Depth: ~4.5 cm
Reply
:iconowlbaskingshark:
Owlbaskingshark Featured By Owner May 1, 2017  Hobbyist Traditional Artist
Thanks.
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:iconpaleosir:
paleosir Featured By Owner May 1, 2017  Hobbyist Traditional Artist
You're welcome!
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:iconthedubstepaddict:
TheDubstepAddict Featured By Owner Apr 5, 2017  Hobbyist Traditional Artist
I'll work to do one too with that as base.
Reply
:iconpaleosir:
paleosir Featured By Owner Apr 24, 2017  Hobbyist Traditional Artist
Btw deadline is 10th of May.
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:iconthedubstepaddict:
TheDubstepAddict Featured By Owner May 14, 2017  Hobbyist Traditional Artist
Fuck
Reply
:iconpaleosir:
paleosir Featured By Owner May 14, 2017  Hobbyist Traditional Artist
¯\_(ツ)_/¯

Maybe next time.

I'll do another contest soon.
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:iconthedubstepaddict:
TheDubstepAddict Featured By Owner May 14, 2017  Hobbyist Traditional Artist
Who won
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:iconpaleosir:
paleosir Featured By Owner May 14, 2017  Hobbyist Traditional Artist
RajaHarimau98
Reply
:iconthedubstepaddict:
TheDubstepAddict Featured By Owner May 15, 2017  Hobbyist Traditional Artist
Fuk
Reply
:iconpaleosir:
paleosir Featured By Owner May 15, 2017  Hobbyist Traditional Artist
You know what, I'm gonna mention you in the next contest so you won't miss that one.

Ok?
Reply
(1 Reply)
:iconthedubstepaddict:
TheDubstepAddict Featured By Owner Apr 24, 2017  Hobbyist Traditional Artist
K
Reply
:iconpaleosir:
paleosir Featured By Owner Apr 6, 2017  Hobbyist Traditional Artist
Ok!
Reply
:iconthedubstepaddict:
TheDubstepAddict Featured By Owner Apr 6, 2017  Hobbyist Traditional Artist
thedubstepaddict.deviantart.co…

Your thoughts on that lip debate?
Reply
:iconpaleosir:
paleosir Featured By Owner Apr 7, 2017  Hobbyist Traditional Artist
Interesting information about the pterosaur lips. Can I have a link, I'd want to learn more about that to derive my own conclusions.
I think you may be onto something, but nonetheless, I have made a case for lips in Dovahkiin's journal.
Reply
:iconthedubstepaddict:
TheDubstepAddict Featured By Owner Apr 20, 2017  Hobbyist Traditional Artist
Reply
:iconpaleosir:
paleosir Featured By Owner Apr 20, 2017  Hobbyist Traditional Artist
Thanks, I want to buy that book anyway.
Reply
:iconthedubstepaddict:
TheDubstepAddict Featured By Owner Apr 20, 2017  Hobbyist Traditional Artist
Nice
Reply
:iconacepredator:
acepredator Featured By Owner Mar 13, 2017
That jaw looks like it's built for brute force.
Reply
:iconpaleosir:
paleosir Featured By Owner Edited Mar 13, 2017  Hobbyist Traditional Artist
Harpactognathus pales in terms of robusticity:
images.dinosaurpictures.org/ha…

But then again, it's over eight times as heavy...
Reply
:iconacepredator:
acepredator Featured By Owner Mar 13, 2017
WTF were these robust-jawed rhamphorhynchids doing?! They're like pterosaurian tyrannosaurs in terms of jaw structure!
Reply
:iconpaleosir:
paleosir Featured By Owner Edited Mar 13, 2017  Hobbyist Traditional Artist
Apparently, at least one even had ziphodont dention: Sericipterus.

In all known ecosystems where we've found them, they seem to be mesopredators, with strong inclinations towards terrestriality (but still very capable of flight).
My hunch is that they were not very dissimilar to modern day caracara's, seriema's and secretary birds, but instead of stomping with their feet, stomping with their front limbs (their carpals seem robust, claws are strong, robust limbs...).
Reply
:iconacepredator:
acepredator Featured By Owner Mar 13, 2017
Sericipterus has ziphont dentition? So it was even more geared to tetrapod-hunting.....

It's an entire radiation of predatory pterosaurs. They just seem a lot more solidly built compared to other non-pterodactyloids.
Reply
:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
The parallels between scaphognathines and ahzdarchids is uncanny.

Group of otherwise fairly unspecialized group grows larger, stockier, more terrestrial and macropredatory.
Both had their largest members at the very end of their existence (Harpactognathus and Hatzegopteryx respectively).
Reply
:iconacepredator:
acepredator Featured By Owner Mar 13, 2017
Except that besides Hatzegopteryx, none of the azhdarchids were, proportionately, as robust or as capable of hunting big prey.
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:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
There's evidence for another robust ahzdarchid from maastrichtian North America IIRC.
Also, all giant ahzdarchids hunted at least fairly large prey, for a pterosaur.
Reply
(1 Reply)
:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
1. It has cutting edges on it's teeth, so yes.

2. Their neck, skulls, and limbs especially.
Torso, pelvis and tail remained roughly the same compared to other non-pterodactyloids.

So they were increasing strength in their appendages used for locomotion and feeding. They were indeed likely hunting relatively large prey.
Reply
:iconacepredator:
acepredator Featured By Owner Mar 13, 2017
Yikes. Surely a nightmare for any animal below a few pounds
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:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
I imagine it being like a combination between a perentie and a caracara, and a corvid.
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(1 Reply)
:icon105697:
105697 Featured By Owner Mar 13, 2017
That doesn't seem like an accurate skull. Better to use the actual fossils than go by a cast.
Reply
:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
Ok.

the other ones are from reptileevolution, and this drawing:
3.bp.blogspot.com/-bluxoJ4TwDc…

images.dinosaurpictures.org/ha…


I can't find the fossil pictures.
Reply
:icon105697:
105697 Featured By Owner Mar 13, 2017
Yeah.....I wouldn't use Reptileevolution as a good source.
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:iconpaleosir:
paleosir Featured By Owner Mar 14, 2017  Hobbyist Traditional Artist
I know.
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:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
It does.
For a pterosaur.

It's probably very light for it's size, it has very large fenestrae, but indeed it would be very strong structurally.
Reply
:iconanalienscientist:
AnAlienScientist Featured By Owner Mar 13, 2017  Hobbyist General Artist
Ik kan de staart niet zien. Dat probleem heb ik ook altijd. Maar verder ziet hij er goed uit!
Reply
:iconpaleosir:
paleosir Featured By Owner Mar 13, 2017  Hobbyist Traditional Artist
Ja, ik was al begonnen en toen paste hij er niet meer op.
Reply
:iconanalienscientist:
AnAlienScientist Featured By Owner Mar 13, 2017  Hobbyist General Artist
Lol
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