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Can anyone suggest a common ancestor for Stegosauria. Scelidosaurus (the
ornithischian parts of the type specimen) is currently considered an
ornithopod. So I'm looking for a more primitive form or something
fabrosaur-like from the late Triassic or early Jurassic.
Also, is it possible that there existed a row of keeled plates much
shorter than the massive spine/plates running down the back between the
large plates. I think that the large plates were firmly attached and did
not have as much motion capabilities as Bakker suggests. Although the
alternating plate arrangement is effective for thermo-regulation, I'm
just not 100% convinced.
---John Schneiderman (firstname.lastname@example.org)