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Gideonmantellia amosanjuanae skeletal reconstructi

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Skeletal reconstruction of Gideonmantellia amosanjuanae from the Early Cretaceous of Spain based on the holotype specimen MPG-PBCH. Those bones crossed by vertical lines are known (at least in part) but were not illustrated, gray indicates unpreserved portions of bones. Scale is in centimeters. Ruiz-Omeñaca et al 2012 find G. amosanjuanae to be a basal Iguanodontian (although they misidentify Iguanodontia on their cladogram) with a number of weird features.
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© 2012 - 2021 ornithischophilia
anonymous's avatar
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Carlosdino's avatar
Great!! I think this reconstruction is better than the original in the paper.
Could I use your skeleton for drawing Gideonmantellia's life restoration? Of course, I'd say that the skeletal reference is yours.
ornithischophilia's avatar
Thanks! Although, they don't actually produce a reconstruction in their paper, just figures with images of most of the bones that were preserved. Also, it's totally cool to use this in a reconstruction, but from what's known, the animal would look like a fairly generic small ornithopod; ie, there are no autapomorphies visible without deep dissection :-)

Ruiz-Omeñaca et al find that it was at the very base of the Iguanodontia branch, so it probably still retained some premax teeth, but it would be six, five, one, or possibly even none. I guess it could be two, three, or four as well, but no ornithopods have ever been found with that number of premax teeth.
Carlosdino's avatar
No? I saw a skeletal restoration, and I thought that it was "official" [link]
Well, I understood it was an animal similar to Hypsilophodon! Isn´t it, then?
ornithischophilia's avatar
Oh huh... I haven't yet seen that, it wasn't included in the actual description. The red bones are of course, a more accurate indication of what they have than my reconstruction, although it looks like they just colored in Galton's restoration of Hypsilophodon from 1973. And yes, it's fairly similar to Hypsilophodon (as well as Othnielosaurus and Thescelosaurus etc).
Carlosdino's avatar
Yes, that reconstruction seems obsolete to me, I prefer yours, it looks better. That's why I was wondering what pic would be better for a life restoration
ornithischophilia's avatar
The cladogram that the authors produced showed Gideonmantellia as a basal iguanodontian, with the following topology:


Their cladogram identifies the Talenkauen+others node as Iguanodontia, but it's generally considered a branch-based clade including Iguanodon and excluding Hypsilophodon, so Gideonmantellia and Thescelosaurus would be iguanodontians in their topology.

And thanks for the kind words! If any of these end up in publications, I'll need to learn how to do them in photoshop. Currently, I draw these by hand with pen and ink on paper, and they're scanned.
Existoo's avatar
Muy buena reconstrucción, sería un animal similar a Thescelosaurus o a Hypsilophodon? tal vez sería bueno que aparecieran tus trabajos en artículos oficiales, solo habría que mejorar la silueta pixeleada, te sería más fácil si los trabajaras en vectores.

Saludos y gracias por tus trabajos, así me es mas fácil estudiar la anatomía de los ornithisquios
anonymous's avatar
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