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About Deviant casiellesMale/Spain Recent Activity
Deviant for 11 Months
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Albertosaurus sarcophagus by casielles Albertosaurus sarcophagus :iconcasielles:casielles 34 4 Untitled Drawing by casielles Untitled Drawing :iconcasielles:casielles 17 0 Zuolong salleei by casielles Zuolong salleei :iconcasielles:casielles 43 0 Sinornis santensis by casielles Sinornis santensis :iconcasielles:casielles 39 0 Protowings by casielles Protowings :iconcasielles:casielles 61 13 Proceratosaurus bradleyi by casielles Proceratosaurus bradleyi :iconcasielles:casielles 33 1 Juravenator starki by casielles Juravenator starki :iconcasielles:casielles 32 3 Monolophosaurus jiangi by casielles Monolophosaurus jiangi :iconcasielles:casielles 23 2 Coelurus fragilis by casielles Coelurus fragilis :iconcasielles:casielles 33 0 Fluff Neck (undescribed dromaeosaurid) by casielles Fluff Neck (undescribed dromaeosaurid) :iconcasielles:casielles 49 15 Xiaotingia zhengi by casielles Xiaotingia zhengi :iconcasielles:casielles 85 2 Dromaeosaurus albertensis by casielles Dromaeosaurus albertensis :iconcasielles:casielles 50 1 Southern grey shrike by casielles Southern grey shrike :iconcasielles:casielles 23 4 Guanlong wucaii by casielles Guanlong wucaii :iconcasielles:casielles 41 5 Velociraptor pair by casielles Velociraptor pair :iconcasielles:casielles 31 0 Halimornis thompsoni by casielles Halimornis thompsoni :iconcasielles:casielles 30 4

Favourites

tyrannosauridae portraits complete (re-fixed) by ShinRedDear tyrannosauridae portraits complete (re-fixed) :iconshinreddear:ShinRedDear 98 30 Gnarly Granny by Stolpergeist Gnarly Granny :iconstolpergeist:Stolpergeist 118 14
Journal
Tyrant Tantrums Part II: Skin'n'Feathers'n'Scales
When I first made my "Pachyderm Rex" drawing, I was quite proud of it as I looked into the creature's facial covering. However, later on, it seemed that it wasn't up to date with the current info. Several changes were needed to make it up-to-date, and those changes will be addressed in this post, as well as something I have been thinking about for quite some time.
So, without further ado, let us once again take a look at the appearance of the Tyrant Lizard King.
The first thing I want to get started one is, of course, those maxilla dents seen in many a rex.
Those depressions in the maxilla are quite odd, and I was puzzled as to what they were. I originally thought they were naked skin that had thickened due to their sorta rough texture. For a decent amount of time, I've been trying to find out as to how those dents may have been, and I think I have found the answer, but that will be addressed in a later post.
For now, I will focus on a part of the skull that has been intriguing me for
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Journal
Are retro '90s Tyrannosaurs making a comeback?
Well, I have to admit it.
It was tempting to draw large tyrannosaurs with a heavy coat of feathers. It proved VERY tempting. But I stuck to my guns and held out on it. Why? I wasn't convinced the evidence would favor it.
I had already seen pictures of skin impressions attributed to the neck and chest of T. rex, and they were scaly. But this wasn't published and therefore people were casting doubt on it (I wonder if they did the same when Yutyrannus photos showed feathers, before it was formally published and described?). Now some may ask what I have against feathered tyrannosaurids, since that is the new orthodoxy in much of paleo-art (just as lizard-like restorations were orthodoxy in the time of Knight and Burian). The answer is actually: nothing. But when talking about giant tyrannosaurids there was no actual evidence of feathered skin. Not only that, but being roughly 1.5 times the length of the still taxonomically controversial Yutyrannus, the largest T. rexes at 12 meters were ov
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Journal
The fuss about Tyrannosaurid feathering
Yeah, most of you probably noticed the controversy as of late : a new paper came out from Bell et al. that finally described some previously undescribed, but rumoured, pieces of tyrannosaurid skin (Well, mostly just T.rex and T.bataar skin). 
The skin impressions revealed very small scales on places like the tail base, illium and neck. 
There's also a few small scale patches from smaller tyrannosaurids, but those are from regions that were commonly left unfeathered anyway (tail underside, feet etc). 
Bell et al. correctly state that these scale impressions don't rule out feathers over the dorsum. But I'll go a step further and say that with the current data, even dorsal feathers are not incredibly likely for Tyrannosaurus rex and it's fellow gigantic tyrannosaurids.
Because what you're really doing is : '' Oh there's scales showing it was less feathered, let's still make it as feathered as possible as the evidence allows''. The scales are pretty uniform eve
:iconpaleosir:paleosir
:iconpaleosir:paleosir 16 100
Kirtland stream by paleosir Kirtland stream :iconpaleosir:paleosir 96 35 Southern cassowary by Xiphactinus Southern cassowary :iconxiphactinus:Xiphactinus 126 26 Liaoningvenator by Xiphactinus Liaoningvenator :iconxiphactinus:Xiphactinus 146 30 2017 Troodontids by Tomozaurus 2017 Troodontids :icontomozaurus:Tomozaurus 141 12 Beautiful feathered tyrants by GetAwayTrike Beautiful feathered tyrants :icongetawaytrike:GetAwayTrike 92 7
Journal
David Peters doesn't only have a bad side.
HOLD ON! SIT YOUR BUTTS DOWN AND READ BEFORE POSTING COMMENTS!
First of all: No, David peters is neighter a scientists, nor are his theories on reptile evolution plausible. And yes, he misinformed a lot of people, and even students in schools with his work. But I'm not here to talk about that.  
I wanna talk about his art and him as an artist, without regard to scientific accuracy or his academic backround.
David peters has created awesome artwork in the past. He has illustrated a lot of books on dinosaurs, some of which got pretty popular:
https://www.google.de/search?q=David+Peters+artwork&client=ms-android-samsung&prmd=isnv&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiykIjFoLnUAhUJKlAKHXObAPEQ_AUIBygB&biw=360&bih=559#imgrc=j33YAH8rKVAABM:
As you see, this is fine artwork on the covers with perfect lighting and (at the time they were made) awesome anatomy and detail. Here is more of his now dated but artistically beautiful work:
https://pterosaurheresies.files.wordpress.com/2013/08/uta
:iconTheDubstepAddict:TheDubstepAddict
:iconthedubstepaddict:TheDubstepAddict 6 58
Tyrannosauroid integument composite by Tomozaurus Tyrannosauroid integument composite :icontomozaurus:Tomozaurus 211 21 Tyrannosaurus rex by MattMart Tyrannosaurus rex :iconmattmart:MattMart 161 164 Callovosaurus leedsi by Kana-hebi Callovosaurus leedsi :iconkana-hebi:Kana-hebi 159 10 Loricatosaurus priscus by Kana-hebi Loricatosaurus priscus :iconkana-hebi:Kana-hebi 188 26 My first digital drawing (Archaeopteryx) by 9Weegee My first digital drawing (Archaeopteryx) :icon9weegee:9Weegee 12 7

Groups

All this started when Concavenator was described. Surprisingly, it's ulna showed apparent quill knobs, this finding was taken with excepticism, let´s remember that Concavenator was discovered before Yutyrannus and Kulindadromeous, and that at that time, we only knew about wings and protowings in pennaraptorans, and therefore, no one expected quill knobs in an allosauroidean. So, alternative hypotheses about the bumps began; the strongest one being that they are ulnar muscle scars. However, this claim was later proven wrong; so it seems likely that allosauroideans had actually protowings.

And here is where the meme begins; since Concavenator was described, everyone has reconstructed it's protowings as formed by bare quills, since they look primitive and therefore, seem to fit to an animal like Concavenator. The problem is that bare quills are actually unlikely, since we know from fossil dinosaurs, like the tail in amber specimen, that barbs evolved before the rachis or quill, while bare quills have only evolved in cassowaries from stage 5 feathes. So open vaned feathers (stage 3) are probably the most likely thing.

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:icondiegooa:
DiegoOA Featured By Owner Apr 11, 2017
Hi, thank you for the watch!:) (Smile) 
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:iconcasielles:
casielles Featured By Owner Apr 13, 2017
No problem 
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:iconpredatorslayer03:
Predatorslayer03 Featured By Owner Mar 26, 2017  Hobbyist Artist
Your art is very impressive! Keep it up. :D
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:iconcasielles:
casielles Featured By Owner Mar 27, 2017
Thank you 
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:iconphotodragonbird:
PhotoDragonBird Featured By Owner Feb 22, 2017  Hobbyist Photographer
Welcome to the group WeLoveBirds! I am glad that you joined! :-)
I look forward to your contributions. :-)
:iconwelovebirds:
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:icondontknowwhattodraw94:
Dontknowwhattodraw94 Featured By Owner Feb 12, 2017  Hobbyist Traditional Artist
Thanks for the watch :D
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:iconcasielles:
casielles Featured By Owner Feb 14, 2017
No problem 
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:iconmrplcole:
mrplcole Featured By Owner Nov 30, 2016
thanks for the watch!
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:iconcasielles:
casielles Featured By Owner Dec 3, 2016
Np 
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:iconmigarataurus:
MigaraTaurus Featured By Owner Nov 27, 2016  Hobbyist General Artist
Thanks for the watch!
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