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Re: Details on SVP 2002 Part 1
> This is not such an odd result; it occurs when you simply remove Ornithischia
> from below "Saurischia" up to sisterhood with some clade within Sauropoda. It
> still seems pretty clear to me that ornithischians are derived prosauropods
> of some basal level of organization (just because segnosaurs no longer fill
> the gap doesn't make the gap go away). And then all those "saurischian
> synapomorphies" simply become dinosaurian synapomorphies, some lost (e.g.,
> skeletal pneumaticity) in ornithischians.
Have you considered the possibility that ornithischians might be neotenic
prosauropods? I'm just suggesting the possibility.