Re: The Hunchback of the Mid-Cretaceous

["Jaime A. Headden" <qilongia@yahoo.com>]

--- Jura <archosaur@reptilis.net> wrote:
>
>
> --- "Jaime A. Headden" <qilongia@yahoo.com>
> >  Suffice it to say, the very arangement of the spines, the
> lack
> >of any distal expansion or areas for tendonous attachment
> >besides the cranial and caudal sulci on the neural spines
> >themselves (between the paired pre- and post-
> spinozygapophyseal
> >laminae), suggesting the lack of a good deal of muscular
> support
> >there. The back was probably quite rigid, in that the
> vertebrae
> >are midly opisthocoelous to platycoelous, which restricts
> motion
> >to some degree.
>
> ++++++++++++++++++++++++++++++++++++++
>
> Really?
>
> On the archives I kept getting referenced to them being
> strongly opisthoceolus. When did this end and the platycoelus
> replacements start?
>
> And how likely is the hypothesis that _Spinosaurus_ could open
> its sail like a Japanese fan (though not *half* as flexible as
> that)?
>
> Jura
>
> ==
> The Reptipage at: http://reptilis.net
>
> Because reptiles are just cooler.
>
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