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RE: Ichthyovenator



"Sinusoidal" is the term used by Allain et al.  I believe the intended meaning 
of it is that the sail that has an upswing, downswing, and then an upswing 
again.  

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> Date: Mon, 23 Apr 2012 11:16:34 -0600
> From: qi_leong@hotmail.com
> To: keesey@gmail.com; Brad.McFeeters@listproc.usc.edu
> Subject: RE: Ichthyovenator
>
>
> I'm not sure what is meant by "sinusoidal," but I'm sure that presuming 
> similarity to *Concavenator corcovatus* on the given description isn't 
> useful. "Sinusoidal" may instead refer to the shape of the sail as presumed 
> for *Spinosaurus aegyptiacus,* with a sharp anterior upswing, followed by a 
> gradual downswing in the profile.
>
> Cheers,
>
> Jaime A. Headden
> The Bite Stuff (site v2)
> http://qilong.wordpress.com/
>
> "Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
>
>
> "Ever since man first left his cave and met a stranger with a
> different language and a new way of looking at things, the human race
> has had a dream: to kill him, so we don't have to learn his language or
> his new way of looking at things." --- Zapp Brannigan (Beast With a Billion 
> Backs)
>
>
> ----------------------------------------
> > Date: Mon, 23 Apr 2012 09:55:39 -0700
> > From: keesey@gmail.com
> > To: dinosaur@usc.edu
> > Subject: Re: Ichthyovenator
> >
> > On Sun, Apr 22, 2012 at 7:32 PM, Brad McFeeters
> > <archosauromorph2@hotmail.com> wrote:
> > >
> > > I have not read the paper yet, but I wonder if a sinusoidal sail might 
> > > actually be characteristic of female spinosaurids. Having a gap in the 
> > > sail above the pelvis might make it easier for the male to get his leg 
> > > over the female when mounting her (picture spinosaurids in this position: 
> > > http://www.luisrey.ndtilda.co.uk/html/carnsex.htm). A somewhat similar 
> > > condition is also seen in the type specimen of Concavenator, maybe a 
> > > solution to the same problem.
> >
> > Interesting idea! Possibly Becklespinax altispinax as well?
> >
> > Hopefully we have enough specimens to test this some day.
> > --
> > T. Michael Keesey
> > http://tmkeesey.net/
>