# paleostream paleoart sciart dinosaurs ornithischian birds tianyulong tianyulooooooooooooooooooooooooooooong dinosaur palaeontology liaoning tiaojishan bajadasaurus pachycephalosaurus amongus imposter sauropod amongusfanart drawing ouranosaurus pterosaurs scicom speculation sketches dinovember stegosaurus spectember missingmesozoiclife

Every day I draw more ornithischians

Turn up brightness to see all details I guess

2 7
2021-09-09

Have been thinking about small ornithischian during so here, take some :D!!!

62 254
2021-08-22

Ornithischians breathed a bit like crocodiles, in that muscles originating on the pelvic girdle pulled on the thoracic peritoneum to generate negative pressure and draw in air (unlike us mammals, who use a diaphragm attached to the ribs to do the same). 🎨 from paper.

0 4
2021-07-10

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.

5/8
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

Styracosaurus albertensis (Spiked lizard) caught in a tsunami. Named by Lawrence Lambe in 1913. Classified as Ornithischia, Cerapoda, Ceratopsia, Ceratopsidae, Centrosaurinae. Late Cretaceous (Campanian Age 83,6-72,1 MYA), from Alberta, Canada (Dinosaur

0 0
2020-10-12

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