Shop Mobile More Submit  Join Login
About Digital Art / Hobbyist MattMartMale/United States Recent Activity
Deviant for 13 Years
Needs Core Membership
Statistics 107 Deviations 1,105 Comments 101,375 Pageviews
×

Newest Deviations

Stegosaurus Comparison by MattMart Stegosaurus Comparison :iconmattmart:MattMart 116 30 Diatryma gigantea by MattMart Diatryma gigantea :iconmattmart:MattMart 196 58 Didanodon altidens by MattMart Didanodon altidens :iconmattmart:MattMart 85 11 A Little Cheneosaur by MattMart A Little Cheneosaur :iconmattmart:MattMart 62 3 Stegoceras validum + Striatornata sp. by MattMart Stegoceras validum + Striatornata sp. :iconmattmart:MattMart 150 20 Monoclonius crassus by MattMart Monoclonius crassus :iconmattmart:MattMart 145 46 Sapeornis by MattMart Sapeornis :iconmattmart:MattMart 137 25 Martinavis cruzyensis by MattMart Martinavis cruzyensis :iconmattmart:MattMart 80 8 Deinodon horridus w/ Nypa sp. palm by MattMart Deinodon horridus w/ Nypa sp. palm :iconmattmart:MattMart 121 21 Struthiomimus altus by MattMart Struthiomimus altus :iconmattmart:MattMart 115 16 The Ascent of Bird by MattMart The Ascent of Bird :iconmattmart:MattMart 406 54 Yixianosaurus longimanus by MattMart Yixianosaurus longimanus :iconmattmart:MattMart 94 10 A Titan Emerges from the Fog by MattMart A Titan Emerges from the Fog :iconmattmart:MattMart 123 25 Archie At 150 by MattMart Archie At 150 :iconmattmart:MattMart 107 40 Anhanguera blittersdorffi by MattMart Anhanguera blittersdorffi :iconmattmart:MattMart 103 19 Giant of the Jiufotang by MattMart Giant of the Jiufotang :iconmattmart:MattMart 104 22

Random Favourites

Zalmoxes by jeffquinn Zalmoxes :iconjeffquinn:jeffquinn 21 14 Lonely house by heida Lonely house :iconheida:heida 98 42 Requiem of a Dream by IsacGoulart Requiem of a Dream :iconisacgoulart:IsacGoulart 5,480 1,164 deep in the woods by barns deep in the woods :iconbarns:barns 713 200 The horn crusher by dustdevil The horn crusher :icondustdevil:dustdevil 262 45 Chasmoshoes by nyctopterus Chasmoshoes :iconnyctopterus:nyctopterus 47 20 Swing Me to the Stars by nyctopterus Swing Me to the Stars :iconnyctopterus:nyctopterus 143 41 Tree Frog by Andalgalornis Tree Frog :iconandalgalornis:Andalgalornis 1 4 Self Portrait by nyctopterus Self Portrait :iconnyctopterus:nyctopterus 70 76 Feathers by chasmosaur Feathers :iconchasmosaur:chasmosaur 641 130 Eocen turtles in environment by dustdevil Eocen turtles in environment :icondustdevil:dustdevil 67 16

Activity


Short and sweet: Two weeks ago, my account here at was compromised and money was stolen from my prints profits via transfer to a foreign PayPal account I never authorized. I've contacted dA several times to try and rectify the situation and have yet to receive any response whatsoever. As a member here for almost 15 years, I'm disgusted by the utterly disgraceful state of dA's security and customer service. If and when I actually manage to get the attention of somebody who works at this ramshackle site and get my money back, I'll be promptly cancelling my account shortly after. You'll be able to see my art on Facebook, on my web site mpm.panaves.com, and of course in my books.

So long deviantArt, and thanks for nothing.
Stegosaurus Comparison
A comparison of three different Stegosaurus specimens. Top is the holotype of S. ungulatus, currently mounted at the Yale Peabody Museum. Middle is the holotype of Stegosaurus stenops, previously on display at the Smithsonian (and presumably which will be back after the current ongoing renovations to the dinosaur halls). Bottom is "Sophie", the Stegosaurus stenops specimen now on display at the British Museum.

I put these together for this blog post (dinogoss.blogspot.com/2015/02/…) mainly to explore the differences between Stegosaurus species, which are often overlooked in popular restorations in favor of a "generic" stegosaur, and to explore plausible ranges of motion inspired by the online debate over the stegosaurs in Jurassic World sweeping their tails along the ground. Note that both species would have had real trouble even touching their tail tips to the ground from a standing position.

Some differences to notice: S. stenops has much larger plates (both in proportion to its size and in absolute terms) than S. ungulatus, though note that many of the hip plates, which are largest in S. stenops, are unknown in S. ungulatus. Another big difference is the arrangement and shapes of the tail plates. Where S. syenops has alternating, large, rounded plates on the tail, S. ungulatus has paired (as indicated by two pairs of minor-image plates unlike any others on the back or in S. stenops specimens) tail plates which were small, narrow, and spine-shaped. Also note the longer legs in S. ungulatus.

S. ungulatus was traditionally depicted with eight tail spikes. This is generally considered wrong today, but the specimen was found with eight spikes, and so far there is no evidence of any other duplicated bones indicating multiple specimens. Proponents of the 4-spike hypothesis suggest duplicate bones may not have been collected and might be present if the site were re-opened, which would be the only way of definitively saying whether or not S. ungulatus had eight spikes.

EDIT: Thanks to SteveOC in the comments for pointing out the likely incorrect placement of the shoulder girdle in the Yale specimen. I shifted the forelimbs back to a more reasonable position which did end up lengthening the neck closer to the S. stenops holotype. Note that Sophie has an even longer neck - I actually shortened it here because as others have pointed out, the mount may actually have too many neck vertebrae.
Loading...
Velociraptor Revisited WIP
An updated version of my most widely-shared illustration ever: commons.wikimedia.org/wiki/Fil…

This drawing is over 10 years old now and has been reposted on countless web sites and news articles talking about how Velociraptor looked very different from the way it is shown in the Jurassic Park series. So when I needed a Velociraptor for an upcoming project, I figured it would be a good opportunity to create a new version based closely on the old one.
Loading...

Comments


Add a Comment:
 
:icondotb18:
DOTB18 Featured By Owner Jul 20, 2016
I'm in need of your assistance. Your book, A Field Guide to Mesozoic Birds and Other Winged Dinosaurs, it states that Microraptor zhaoianus is found in both the Yixian and Jiufotang formations. Yet virtually all other sources say it's exclusively Jiufotang. So what's going on here? Is this a case of Science Marches On or are there Yixian Microraptors hiding in a museum somewhere?
Reply
:iconmattmart:
MattMart Featured By Owner Jul 20, 2016  Hobbyist Digital Artist
Good question! Turner 2012's paper on paravian systematics lists Microraptor as coming from both the Yixian and the Jiufotang. That's why it was included as such in my book. I had assumed further specimens from the Yixian were found and were among the ones discussed in Turner's paper. However, so far there doesn't seem to have been any more on this, and Turner does not cite any particular Yixian specimens. A few people have asked me about this and now that I think about it, I have a hunch Turner might have been including the Yixian specimen now known as Changyuraptor. Just a hunch, but it's possible. So far no other specific fossil currently assigned to Microraptor have been published as specifically hailing from the Yixian.
Reply
:icondotb18:
DOTB18 Featured By Owner Jul 20, 2016
Thank you so much for clearing that up.
Reply
:icondraco-datura:
draco-datura Featured By Owner Jun 21, 2016
Amazing art! :)
Reply
:icond3in0nychu5:
d3in0nychu5 Featured By Owner Apr 7, 2016  Hobbyist Traditional Artist
Haven't seen many updates here or on your blog in a while. Hope you're doing well. Is the new book still coming along?
Reply
:iconmattmart:
MattMart Featured By Owner Apr 16, 2016  Hobbyist Digital Artist
Yes, doing well, thanks! My real job and other things have been keeping me pretty busy. Most of what I've been working on is for the new book(s) so I haven't been posting much online, but I'm plugging away at it! I'm hoping to have one new book ready by the end off this year, but that might be over-ambitious...
Reply
:icongavingavin123:
gavingavin123 Featured By Owner Dec 30, 2015  Student Traditional Artist
Just picked up a copy of A Field Guide to Mesozoic Birds from the holidays, and I love it! Amazing work.
Reply
:iconmattmart:
MattMart Featured By Owner Jan 2, 2016  Hobbyist Digital Artist
Thanks, glad you like the book! :D
Reply
:iconplastospleen:
PLASTOSPLEEN Featured By Owner Apr 2, 2016
I quite like it too.
Reply
:iconterizinosaurus:
Terizinosaurus Featured By Owner Aug 21, 2015
Nice !!! :)
I like Stegoceras !!! :love:



I am your  Watcher !!! :D :D :D
Reply
Add a Comment: