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Osmatar — A Hypothetical Basal Ornithischian

#dinosaur #feathers #filaments #lips #paleoart #scales #scaly #ornithischian #ornithoscelidan
Published: 2017-04-02 14:02:15 +0000 UTC; Views: 3832; Favourites: 87; Downloads: 0
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Description Here's a proper introduction to this guy, that I previously posted as a part of an April Fool's Day prank under the name of Hylaeodromaeus.  

I created this illustration sort of by accident. I originally wanted to try to create a hypothetical early ornithoscelidan that fit in just after the supposed divergence of Ornithischia from Theropoda. However when I sketched the skull that I drew the line art on top of, I was a bit sloppy, and when I started to clean up the skull sketch for a drawing to go with the life appearance, I realized it was a lot more like a regular Ornithischian than I intended. Unsure of what to make of it, with April 1st just around the corner, I ended up turning into the aforementioned hoax.

Make no mistake though, I intended this to be a realistic restoration of an animal that could have existed. I blended together features from a number known early taxa like Eocursor and Eoraptor. The scalation is based on squamates, and went with the assumption that ornithiscians had diapsid-style lips. Whether the lower jaw supports a proper rhamphotheca or if it's just an enlargened scale, the animal definitely has a toothless predentary, which did end up supporting a ceratinous beak in later ornithischians. I decided to depict the filaments emerging from the facial scales, inspired by the strange integumentary structures of Kulindadromeus that have a number of filaments attaching to a plate-like base. Whether or not those are modified scales I don't know, but I decided to run with it.
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Comments: 6

Gerdkinerf [2017-04-03 02:58:11 +0000 UTC]

I hope fossils of something like this are found eventually. It'd definitely help many grasp how we got weird shit like Stegosaurus, Triceratops, and Ankylosaurus from theropod-like ancestors.

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Osmatar In reply to Gerdkinerf [2017-04-03 14:23:01 +0000 UTC]

If Ornithiscelida really is a thing, I would expect that will happen eventually. And my speculative creature isn't really radically different from some already known basal ornithischians like Lesothosaurus, Fabrosaurus, Eocursor and Stormbergia that I used when designing its skull.

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Ceratopsia [2017-04-02 15:13:30 +0000 UTC]

A very plausible prank at that.

👍: 0 ⏩: 1

Osmatar In reply to Ceratopsia [2017-04-03 14:11:16 +0000 UTC]

Maybe even too plausible. People were disappointed it wasn't real.

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Viergacht [2017-04-02 14:34:59 +0000 UTC]

It's a very convincing critter.

👍: 0 ⏩: 1

Osmatar In reply to Viergacht [2017-04-03 14:10:47 +0000 UTC]

Thanks. I tried to approach it as I would restoring a real taxon.

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