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Limusaurus

By NTamura
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I haven't done much for a while, but how can I resist? This is the newly described Limusaurus inextricabilis from the Oxfordian of Western China. Very ornithomimid like isn't it? Well, it is actually a ceratosaur with some very unusual characteristics. This little (1.5-2 meters long) relative of the giant meat-eating Ceratosaurus was beaked and toothless! The presence of gastroliths in the stomach further confirm a vegetarian diet. That's not all: the tiny arms have hands with four fingers with a very reduced digit I. When (almost) everybody thought that the 3 digit hands of the advanced theropods as well as the wing of birds resulted from the disappearance of digits IV and V, this little critter tends to indicate otherwise: the three remaining digits are II-III-IV. This is indeed what developmental studies on bird embryos show.
Update: :iconmattmart: suggested a few changes for better accuracy.
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anonymous's avatar
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Paleodinos59's avatar
Quel ordre de cet ornithomimidé? svp. Merci.
NTamura's avatar
Pas un Ornithomimid. D'apres un papier de 2016, il s'agirait d'un Noasaurid.
ProcrastinatingStill's avatar
Ceratosauria's answer to Ornithomimids.
Saberrex's avatar
for the most part, ceratosaurs are carnivores, so this guy is weird and wonderful to see none the less. it also makes me wonder if noasaurids evolved from this animal.
Michelle56's avatar
Aww so cute, I've never heard of it before. :D
tassietyger's avatar
I won't be too surprise that ceratosaurs were also coelurosaurs or the fact that all theropods were indeed feathered.
Dgylia's avatar
NTamura's avatar
MattMart's avatar
Very sweet, especially that textured effect! However, what did you use for a skeletal reference? The ischium looks a bit too short/shallow relative to the pubis, giving a weird grade smoothly from the pubis to the tail with no bits pointing out in between. The skull shape also looks pretty different from the skull recon in the supplementary info from the paper, and the hand looks too big compared to the rest of the arm. (<-- all based on fig. S1 in the paper, fwiw). Also, while it's unknown, why such a short tail? Most ceratosaur tails of this 'grade' are pretty long.

Sorry for all the critique, feel free to correct me if I've misinterpreted ;)
NTamura's avatar
Thanks for the critiques. I amended the illustration accordingly.
RickRaptor105's avatar
So, this is a small, plant-eating ceratosaur?

Nature amazes me again and again.
darklord86's avatar
NTamura's avatar
Ryivhnn's avatar
It has feet like a chicken! Must have been the "black sheep" of the family, all those carnivores and along comes this one "Meat is murder! I'm going vego!" *blank stares from rest of family* :)
EmperorDinobot's avatar
Therefore he is SCALY AND FEATHERLESS!!!

Yesssss...I <3 Ceratosaurs.
NTamura's avatar
Aren't you afraid they might find a feathery ceratosaur one day?
EmperorDinobot's avatar
Yes. Think of all the damn let's put feather on all theropods fanatics out there. Ugh. They don't need more leverage.
bubblekirby's avatar
I think all the smaller ones would have them. I also would be highly suprised to find that hysphilodonts were not feathered. But I agree its ridiculous to put feathers on giant allosaurs and Tyranosaurs (with the exception of the tyranosaurs at the north pole...)
JohnFaa's avatar
Therefore, I think you should had included some sort of integrumentary structure, since they were present in ornithicians like a certain heterodontosaur and some early ceratopsians
NTamura's avatar
Yes, but I'll wait to see what they'll dig up next... a meat-eating feathered ceratopsian perhaps...;)
Bran-Artworks's avatar
If there were partial carnivorous dicynodonts, why not a ceratopsian¡? :D..
anonymous's avatar
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