Subscribe Now
Buy deviantWEAR
Advertise Here
[x]
All Deviations

Theriodontia by ~mojcaj:iconmojcaj:

Categories Digital Art > Drawings > Animals

Creative Commons License
Some rights reserved. This work is licensed under a
Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.
Details
Submitted: May 2
File Size: 347 KB
Image Size: 347 KB
Resolution: 1000×1439
Comments: 6
Favourites & Collections: 12 [who?]

Views
Total: 186
Today: 0

Downloads
Total: 6
Today: 0

Thumb

Artist's Comments

I created three realistic reconstructions of early members of Theriodontia. They were all carefully studied. I decided to add basal hair on therocephalian and drawn cynodont as fully hairy animal (cynodonts probably originate from basal therocephalians), but keeping hairless skin on gorgonopsian.
[x]

Devious Comments

love 1 1 joy 0 0 wow 1 1 mad 0 0 sad 1 1 fear 0 0 neutral 0 0

~sturmfeuer:iconsturmfeuer: May 2, 2008, 2:06:38 PM Mood: Wow!
wow!
Looks really admirable.
Good work.

--
I took everything I hated and made it a part of me...
~Sinande:iconSinande: May 2, 2008, 3:20:33 PM Mood: Love
Out of interest, what were your decisions about hair based on? I tried to find easy but informative online reading on gorgonopsians several times, but there seems to be a huge lack of it (Alex Freeman's rather old undergrad project and another site ([link]) was basically all I found). I'm not really keen on reading technical papers, but if there's nothing else I would welcome a couple of good recommendations.

(I still love your therapsids, btw :))

--
"... no vestige of a beginning, no prospect of an end" - James Hutton
~mojcaj:iconmojcaj: May 2, 2008, 11:54:13 PM
There is not much known about therapsids skin; the only known fossilized skin impression comes from Russia and it belongs to dinocephalian Estemmenosuchus. No scales or hair are visible, only small pits. It is believed that synapsid split happened soon after first amniote appearance, therefore many paleontologists think they may not even be reptiles or belonging to reptile clade. If you are interested in studying these animals, this two sites can be checked: [link]
[link]
Everything about therapsid skin is therefore pure speculation.

--
MJ
~Sinande:iconSinande: May 3, 2008, 2:16:06 PM
Ah, thanks. (Well, not exactly everything is pure speculation. At least have reason not to put hair on a dinocephalian :))

Hmm... I wonder if scales and hair are homologous or independent inventions. (IOW, whether the common ancestor of Synapsida and Sauropsida had scales) *goes off on random tangents* (Never mind, I think too much :D)

Is there an English version of the Dinodontosaurus thing? I guess I could understand the Portuguese if I really tried to but it'd be much easier to have it in a language I actually know :)

--
"... no vestige of a beginning, no prospect of an end" - James Hutton
~mojcaj:iconmojcaj: May 8, 2008, 8:41:27 AM Mood: Sadness
There is a lot to discuss and guess about this 'hairy' topic. About the skin impression of Estemmenosuchus....it comes from a head region, it shows lenticle structure (or pits in negative), which means the skin probably had glands. Reptiles have no skin glands. We can conclude that Estemmenosuchus had no scales or hair but only on head region!

About Dinodontosaurus...pity, no english version.

--
MJ
Previous Page        Next Page
Sign up to leave feedback! <3
©2008 deviantART. All rights reserved
About Us | Contact Us | Help & FAQ Advertise | Services Etiquette | Privacy Policy | Terms of Service | Copyright Policy