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About Deviant Henry ThomasMale/United States Group :iconhuxley-paleozoo: Huxley-paleozoo
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Deviant for 9 Months
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Statistics 4 Deviations 10 Comments 429 Pageviews

Newest Deviations

Baby Achillobator by Zhejiangopterus Baby Achillobator :iconzhejiangopterus:Zhejiangopterus 6 1 Ludodactylus sibbicki by Zhejiangopterus Ludodactylus sibbicki :iconzhejiangopterus:Zhejiangopterus 4 0 Ludodactylus skulls by Zhejiangopterus Ludodactylus skulls :iconzhejiangopterus:Zhejiangopterus 7 0 The variety of stem-bird feathers by Zhejiangopterus The variety of stem-bird feathers :iconzhejiangopterus:Zhejiangopterus 44 2


The Slenderdactyl by amorousdino The Slenderdactyl :iconamorousdino:amorousdino 192 12 Deinodon and Aublysodon by PLASTOSPLEEN Deinodon and Aublysodon :iconplastospleen:PLASTOSPLEEN 130 17 Utahraptor ostrommaysorum by PLASTOSPLEEN Utahraptor ostrommaysorum :iconplastospleen:PLASTOSPLEEN 127 17 Timimus hermani by PLASTOSPLEEN Timimus hermani :iconplastospleen:PLASTOSPLEEN 90 36 Kileskus aristotocus by Olorotitan Kileskus aristotocus :iconolorotitan:Olorotitan 201 7 Caulkicephalus by Midiaou Caulkicephalus :iconmidiaou:Midiaou 141 17 She Sees by Midiaou She Sees :iconmidiaou:Midiaou 141 17 Happy Belated birthday Tom by Midiaou Happy Belated birthday Tom :iconmidiaou:Midiaou 139 16 A day at the beach by JonaGold2000 A day at the beach :iconjonagold2000:JonaGold2000 150 140 Utah's Grizzly Hawk by Valia2305 Utah's Grizzly Hawk :iconvalia2305:Valia2305 99 51 Gryposaurus monumentensis by Olorotitan Gryposaurus monumentensis :iconolorotitan:Olorotitan 185 6 Muttaburrasaurus langdoni Rigorous Skeletal by PLASTOSPLEEN Muttaburrasaurus langdoni Rigorous Skeletal :iconplastospleen:PLASTOSPLEEN 50 24 Lord of Zamyn Khond crematorium by GetAwayTrike Lord of Zamyn Khond crematorium :icongetawaytrike:GetAwayTrike 56 2 Talarurus by Olorotitan Talarurus :iconolorotitan:Olorotitan 137 23 A Field Guide to Mesozoic Twitter Birds by Albertonykus A Field Guide to Mesozoic Twitter Birds :iconalbertonykus:Albertonykus 76 13 Vigilante from Auca Mahuevo by Midiaou Vigilante from Auca Mahuevo :iconmidiaou:Midiaou 148 23



Baby Achillobator
For Huxley Paleozoo. Based largely on Bambiraptor, adjusted to be slightly chunkier.
Ludodactylus sibbicki
An attempt at a life recon. I'm of the mindset that Anhanguerians used their beaks and any head crests for intraspecific display and species recognition, and consequently that the heads may have been distinctively colored.
Ludodactylus skulls
Ludodactylus definitely deserves the name "toy finger" - it looks just like the "toothy Pteranodon" stereotype present in a lot of cheap toys! The holotype of L. sibbicki is an almost complete skull and mandible, missing only the distal part of the crest (of course I made it look like that of Pteranodon). Hyoid not shown.

MN 4797-V was referred to Brasileodactylus sp. by Sayao & Kellner. I disagree. It isn't clearly diagnostic to Brasileodactylus anymore, dentition patterns seem to differ, and it hails from a different formation than the holotype of B. araripensis. It's strikingly similar to Ludodactylus, though, which does come from the same formation (as pointed out previously by Unwin and Martill). It seems to have a proportionally shallower snout than the holotype, assuming relative tooth spacing stays roughly the same.

Scale bar is 5 cm.

Frey, E.; Martill, D.; Buchy, M. (2003). "A new crested ornithocheirid from the Lower Cretaceous of northeastern Brazil and the unusual death of an unusual pterosaur". Geological Society, London, Special Publication 217: 56-63.
Unwin, D.M.; Martill, D. (2007). "Pterosaurs of the Crato Formation". In: Martill, D.M.; Bechly, G.; Loveridge, R.F. (eds.), The Crato Fossil Beds of Brazil: Window into an Ancient World
Veldmeijer, A.J. (2016). "Toothed Pterosaurs from the Santana Formation (Cretaceous; Aptian–Albian) of Northeastern Brazil. A Reappraisal on the Basis of Newly Described Material" (Doctoral dissertation, Utrecht University, 2006). Proefschrift Universiteit Utrecht, 1-269.
Veldmeijer, A.J.; Signore, M.; Meijer, H. (2005). "Brasileodactylus (Pterosauria, Pterodactyloidea, Anhangueridae); an update". Cranium 22(1): 45-56.

(this is my first skeletal diagram, feedback is appreciated!)
The variety of stem-bird feathers
Here are the many varieties of filamentous integument that have evolved in Avemetatarsalia. It's more complex than just the five stages!

Quotes denote nicknames I gave to filament types that, as far as I know, don't have a widely or technically used name yet. Tan vanes are made of many branching filaments, red vanes are solid.

Update 3/23/17: Added a few things I missed - kudos to :icontomozaurus: for pointing them out! Interestingly the feathers of DIP-V-15103 (the amber tail) clearly show an incompletely developed rhachis, seemingly bridging the gap between stages 2 and 3. It also seems barbules potentially evolved before the rhachis!

Chen, P.; Dong, Z.; Zhen, S. (1998). "An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China". Nature 391: 147-152.
Currie, P.J.; Chen, P. (2001). "Anatomy of Sinosauropteryx prima from Liaoning, northeastern China". Canadian Journal of Earth Sciences 38(12): 1705-27.
Godefroit, P.; Sinitsa, S.M.; Dhouailly, D.; Bolotsky, Y.L.; Sizov, A.V.; McNamara, M.E.; Benton, M.J.; Spagna, P. (2014). "A Jurassic ornithischian dinosaur from Siberia with both feathers and scales". Science 345(6195): 451-5.
Hone, D.W.E.; Tischlinger, H.; Xu, X.; Zhang, F. (2010). "The Extent of the Preserved Feathers on the Four-Winged Dinosaur Microraptor gui under Ultraviolet Light". PLoS ONE 5(2): e9223.
Kellner, A.W.A.; Wang, X.; Tischlinger, H.; Campos, D.dA.; Hone, D.W.E.; Meng, X. (2010). "The soft tissue of Jeholopterus (Pterosauria, Anurognathidae, Batrachognathinae) and the structure of the pterosaur wing membrane". Proceedings of the Royal Society B, 277(1679).
Lu, J.; Brusatte, S.L. (2015). "A large, short-armed, winged dromaeosaurid (Dinosauria: Theropoda) from the Early Cretaceous of China and its implications for feather evolution". Scientific Reports 5: 11775.
Mayr, G.; Pittman, M.; Saitta, E.; Kaye, T.G.; Vinther, J. (2016). "Structure and homology of Psittacosaurus tail bristles". Palaeontology 59(6): 1475-4983.
Pu, H.; Kobayashi, Y.; Lu, J.; Xu, L.; Wu, Y.; Chang, H.; Zhang, J.; Jia, S. (2013). "An Unusual Basal Therizinosaur Dinosaur with an Ornithischian Dental Arrangement from Northeastern China". PLoS ONE 8(5): e63423.
Rauhut, O.W.M.; Foth, C.; Tischlinger, H.; Norell, M.A. (2012). "Exceptionally preserved juvenile megalosauroid theropod dinosaur with filamentous integument from the Late Jurassic of Germany". Proceedings of the National Academy of Sciences, 109(29): 11746-51.
Van der Reest, A.J.; Wolfe, A.P.; Currie, P.J. (2016). "A densely feathered ornithomimid (Dinosauria: Theropoda) from the Upper Cretaceous Dinosaur Park Formation, Alberta, Canada". Cretaceous Research 58: 108-117.
Wang, M.; O'Connor, J.K.; Pan, Y.; Zhou, Z. (2017). "A bizarre Early Cretaceous enantiornithine bird with unique crural feathers an an ornithuromorph plough-shaped pygostyle". Nature Communications 8: 14141
Xing, L.; McKellar, R.C.; Xu, X.; Li, G.; Bai, M.; Persons, W.S.; Miyashita, T.; Benton, M.J.; Zhang, J.; Wolfe, A.P.; Yi, Q.; Tseng, K.; Ran, H.; Currie, P.J. (2016). "A Feathered Dinosaur Tail with Primitive Plumage Trapped in Mid-Cretaceous Amber". Current Biology 26: 1-9.
Xu, X.; Norell, M.A.; Kuang, X.; Wang, X.; Zhao, Q.; Jia, C. (2004). "Basal tyrannosauroids from China and evidence for protofeathers in tyrannosauroids". Nature 431: 680-684.
Xu, X.; Wang, K.; Zhang, K.; Ma, Q.; Xing, L.; Sullivan, C.; Hu, D.; Cheng, S.; Wang, S. (2012). "A gigantic feathered dinosaur from the Lower Cretaceous of China". Nature 484: 92-5.
Xu, X.; Zheng, X.; Sullivan, C.; Wang, X.; Xing, L.; Wang, Y.; Zhang, X.; O'Connor, J.K.; Zhang, F.; Pan, Y. (2015). "A bizarre Jurassic maniraptoran theropod with preserved evidence of membranous wings". Nature 521: 70-3.
Xu, X.; Zheng, X.; You, H. (2009). "A new feather type in a nonavian theropod and the early evolution of feathers". Proceedings of the National Academy of Sciences 106(3), 832-4.
Xu, X.; Zhou, Z.; Prum, R.O. (2001). "Branched integumental structures in Sinornithosaurus and the origin of feathers". Nature 410, 200-4.
Zhang, F.; Zhou, Z.; Dyke, G. (2006). "Feathers and 'feather-like' integumentary structures in Liaoning birds and dinosaurs". Geological Journal 41: 395-404
Zhang, F.; Zhou, Z.; Xu, X.; Wang, X.; Sullivan, C. (2008). "A bizarre Jurassic maniraptoran from China with elongate ribbon-like feathers". Nature 455: 1105-8.
Zheng, X.; You, H.; Xu, X.; Dong, Z. (2009). "An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures". Nature 458: 333-6.


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Henry Thomas
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