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FW: Concavenator corcovatus, a new humped carcharodontosaurid from Las Hoyas
Won't argue. Of course Dann makes sense here. I just got too close to a single
elemental cause. Perhaps what bothers me on this one is the supposed energy
to doing this. Then again .....
> Date: Wed, 15 Sep 2010 21:37:46 -0400
> From: firstname.lastname@example.org
> To: email@example.com; firstname.lastname@example.org; email@example.com
> Subject: Re: FW: Concavenator corcovatus, a new humped carcharodontosaurid
> from Las Hoyas
> Dale... Dann pretty much beat me to the punch. Rather than parrot
> him, I'll just say "I agree with Dann" ;-)
> On Wed, Sep 15, 2010 at 8:14 PM, Dann Pigdon wrote:
>> On Thu, Sep 16th, 2010 at 9:27 AM, dale mcinnes wrote:
>>> If sexual behavior is at the root cause of the elongation of spine growth
>>> why DON'T we see more of this in other clades?? This should be occurring
>>> since sexual selection is also everywhere in every clade and NOT dependent
>>> on envir-
>>> onmental regimens.
>> There are numerous reasons why neural spine elongation wasn't always the
>> 'sexiness of choice':
>> 1) Not all species may have used visual displays to attract mates. Some may
>> have used scent,
>> song, or courtship 'dances'. Sometimes all you need to get the girls is to
>> be able to kick your
>> opponents' arses in intraspecific combat - where in fact a lack of impeding
>> adornments might even
>> be an advantage.
>> 2) Of those that used visual displays, bright colouration may have been
>> preferable to changes in
>> body form. Perhaps those species that resorted to costly changes in body
>> form simply lacked the
>> genetic resources to evolve bright colours or bold markings.
>> 3) Elongated neural spines may have been just one type of display structure.
>> Crests, frills, horns,
>> spikes and plates may have also been primarily for display purposes in some
>> Dann Pigdon
>> Spatial Data Analyst Australian Dinosaurs
>> Melbourne, Australia http://home.alphalink.com.au/~dannj