Dino Discoveries:  Ornithomimus edmontonicus

The origins of winged flight is a hotly debated topic in paleontology. A study published last year in Science suggests that wings and feathers may have evolved in dinosaurs earlier than previously thought. When researchers took a closer look at several fossil specimens of Ornithomimus edmontonicus, they found winglike forelimbs and hundreds of traces of filaments suggestive of feathers. Ornithomimus belongs to a group of dinosaurs that appears in the fossil record millions of years before maniraptorans, the group of feathered dinosaurs that survives today as birds, the findings hint at even earlier evolutionary origins of wings and feathers.

O. edmontonicus was no flier, however. The researchers estimate it weighed 150 kilograms (330 pounds), so it’s wings more likely served some other function, perhaps in courtship or brooding.

Image: Julius Csotonyi (above)/Royal Tyrrell Museum (below)

(via: Wired Science)


Lythronax’s news from the world of news:

This week has been an exciting week! Two main things of note:

  • Saltillomimus rapidus, a new genus of ornithomimid! Well, not exactly new. It was first announced in a thesis back in 2010, but the press release hasn’t happened until now. Saltillomimus hails from the Cerro de Pueblo formation in Mexico, and is known from a mostly complete leg, as well as some elements of its axial skeleton. Its toes are noticeably a lot more robust and would have been more splayed than other ornithomimids; it may have been a swamp-dweller. Saltillomimus is named after Saltillo, near which it was found, and rapidus is a nod towards the fact that the authors think Saltillomimus was among the faster ornithomimids. Reconstruction up-top by me, which, as far as I know, is the first feathered full-body reconstruction of Saltillomimus on the internet. It’s shown not with pennaceous feathers, but a thick layer of quills - Foth et al. (2014) didn’t include ornithomimids as part of Pennaraptora (the clade with true pennaceous feathers) in their Archaeopteryx paper.
  • Pentaceratops aquilonius, a new species of Pentaceratops that is known from a partial frill. The specimen, CMN 9813, was originally assigned to Arrhinoceratops, but it’s recently been rediscovered in the Canadian Museum of Nature’s archives by Longrich et al. They re-examined the specimen and determined that, while it was very similar to Pentaceratops sternbergi, anatomical differences still enabled it to be erected as a separate species. The species was named P. aquilonius, aquilonius being the Latin word for ‘north’ (P. aquilonius was found a lot further north than P. sternbergi). The paper also described a specimen of Kosmoceratops, but it doesn’t preserve a frill and it’s difficult to diagnose it any further. Reconstruction up top by Longrich.

The papers are here and here.

english class sketches from the other day yea (((hi res plS)

this was based off the thing that i found once but i cant remembER OR FIND IT about dinosaurs having shorter thicker necks like birds? and then i thought about ornithomimosaurs w that and i cant decide which one i like better they both look pretty neat

somethings up with the legs but i didn;t have any reference;;;;


First Feathered Dinosaur Discovered in North America - Royal Tyrrell Museum

Researchers from the Royal Tyrrell Museum and University of Calgary have discovered fossil evidence of the first feathered dinosaurs from North America in the 75 million-year-old rocks of the Alberta badlands.


Gallimimus (/ˌɡælɨˈmaɪməs/ GAL-i-MY-məs; meaning “chicken or rooster mimic”) is a genus of ornithomimid theropod dinosaur from the late Cretaceous period (Maastrichtian stage) Nemegt Formation of Mongolia. With individuals as long as 8 metres (26 ft), it was one of the largest ornithomimosaurs. Gallimimus is known from multiple individuals, ranging from juvenile (about 0.5 metres tall at the hip) to adult (about two metres tall at the hip).

Gallimimus bullatus is a species belonging to the genus Gallimimus and was an ornithomimid theropod dinosaur from the late Cretaceous period.

Gallimimus was rather ostrich-like, with a small head, toothless beak, large eyes, a long neck, short arms, long legs, and a long tail. With individuals as long as 8 metres (26 ft), it was one of the largest ornithomimosaurs.

It was prominently featured in the Jurassic Park series and is set to appear in Jurassic World this June.


Anserimimus (/ˌænsərɨˈmaɪməs/ an-sər-i-my-məs; “goose mimic”) is a genus of ornithomimid theropod dinosaur, from the Late Cretaceous Period of what is now Mongolia. It was a lanky, fast-running animal, possibly an omnivore. From what fossils are known, it probably closely resembled other ornithomimids, except for its more powerful forelimbs.