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Re: "real" opisthopuby (very speculative)
> as a side note, he also seems to have written an article in Paleontology
> 1972 on Triassic Ornithischians,
I've never heard of that paper, but I'd bet _something_ that all
ornithischians he describes there are meanwhile considered Early Jurassic,
so it might not be that interesting.
> ----- Original Message -----
> From: "Ken Kinman" <email@example.com>
> > Is it possible that the prepubic process is a primitive character
> > Ornithischia, and that its gradual loss is derived.
All basal ornithischians (*Lesothosaurus*, *Scelidosaurus*...) have the
postpubic process but no or only a very short prepubic one. The situation is
totally clear IMHO, the rotation is real. You've been looking too long at
derived ceratopsids (which have _only_ the prepubic process anymore), I