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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.
Jaime A. Headden
The Bite Stuff (site v2)
"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
> Date: Mon, 23 Apr 2012 09:55:39 -0700
> From: email@example.com
> To: firstname.lastname@example.org
> Subject: Re: Ichthyovenator
> On Sun, Apr 22, 2012 at 7:32 PM, Brad McFeeters
> <email@example.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