# paleoart drawing dinosaur ouranosaurus dinosaurs paleostream sciart pterosaurs scicom speculation sketches dinovember stegosaurus spectember missingmesozoiclife sorryornithischians crabs ichthyosaurs ornithischians sketching dinocember sketchbookapp

These morphologies reveal key information on the evolution of the ornithischian body plan. Tucki represents the very early steps in the evolution of a unique ventilation mechanism, the ‘pelvic bellows’ model.

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Figure by

14 63
2021-07-06

Ouranosaurus nigeriensis

(Based on the skeletal made by Scott Hartman)

2 23
2021-05-21

Another new ornithischian out today: early-diverging centrosaurine Menefeeceratops sealeyi Dalman et al., 2021 from the Campanian Menefee Formation of New Mexico.

2 18
2021-05-11

Silesaurus was a rather strange reptile of uncertain taxonomic affinities. Was it a Dinosauriform as is traditionally, or was it an Ornithischian as of a new study? Probably the latter, but hopefully future research reveals more on this strange Triassic creature!

5 39
2021-04-18

I hope that the data contained herein will be a useful springboard for future phylogenetic and paleobiological studies of early-diverging ornithischians.

6 34
2021-02-27

In short, it explains that, although ornithischians likely DID NOT have a "new cheek muscle" bridging between maxilla & dentary, some (but not all!) of them, like ceratopsids, had jaw muscles originating inside the head that likely extended forward on the jaw for more leverage.

6 35
2021-02-09

Good evening everyone! Tonight’s Dino of the day is craspedodon! Craspedodon was an ornithischian that lived during the Cretaceous period. It was found in Belgium 🇧🇪. It’s name means “edge tooth”. See you explorers tomorrow!🤠
Credit: José Carlos Cortés

12 60
2021-01-30

Many of Dixon's smaller ornithischians would hold up pretty well today if it wasn't for that weird fashion of shrinking the tail muscles to a level it's almost just a stiff rod.

23 121
2021-01-06

(1/2) Results from the "wishes for 2021"
Eagle owl sized anurognathid, hippo stegosaur, small ornithischian with elaborate display structures....

58 441
2021-01-02

There IS precedent for this kind of flexibility as it’s seen in alligators but im not sure about ornithischians or other archosaurs

2 9
2020-11-30

Dinovember 05_Stegosaurus
I can’t stop posting hypermobile dinos. I’m really sorry...
Stegosaurus is a group of herbivorous ornithischian dinosaurs that lived during the Jurassic and early Cretaceous periods.

0 13
2020-11-06

Tooth replacement patterns in early ornithischians - Manidens condorensis provides baseline study https://t.co/SvQ0x6rZ2N

26 57
2020-09-30

Since I missed yesterday, for the 17th, I have a double dose of being an estuarine temnospondyl hiding in cold and salty delta mud and preying on an ornithischian and a suction feeding plesiosaur with a large gular pouch for that purpose.

2 12
2020-09-17

A late post, but I sketched some theropods tonight; no references so their accuracy is dubious, but I wanted to have fun ^^

19 84
2020-05-28

A large theropod from the Elliot Formation, Dracovenator regenti lived in the early jurassic of South Africa being a major predator of the varied herbivores that existed in the region, including small sauropodomorphs and the minuscule ornithischians.

23 98
2020-04-04

One of the earliest known ornithischian from the Early Jurassic of South Africa, Lesothosaurus was a small gracile herbivore (or potentially omnivore) of not more than 2 m long, alongside many small Heterodontosaurs they lived on the shadows of the big animals.

21 72
2020-04-04

Science hand-waving activated.

As herbivores, Centaurs required large intestines for the amount of plant material they needed to eat. Instead of evolving an Ornithischian pelvis like the dinosaurs, they instead evolved the novel means of just making another torso on their butt.

0 7
2020-01-31

Results from the
Morrosaurus, Besanosaurus and Dinocarcinus (just published by et al)

36 194
2019-12-28

Day 17: Warning call.

A basal neornithischian hypsilophodon is giving a warning call when danger is around.

1 2
2019-12-18