Re: An alternative to ST and AAT
Paul Crowley (Paul@crowleyp.demon.co.uk)
Thu, 31 Oct 96 21:01:27 GMT
In article <3275D544.firstname.lastname@example.org> email@example.com "Phillip Bigelow" writes:
> Paul Crowley wrote:
> > The primate species that adapted to the ground probably did it
> > in the absence of competition. It would not have happened often.
> Maybe...maybe not. Just speculation.
No, it's not just speculation. Ecological niches get filled.
The terrestrial primate ones are occupied by large variety.
It's very hard to see how a gibbon or an orang or other purely
arboreal primate could establish itself on the ground in a new
niche in the face of such competition.
Further, purely arboreal species tend to become very specialised
with particular adaptations that virtually debar the adoption of
a terrestrial role. Typically these include a degree of
clumsiness on the ground that amounts to an inability to make
> > > If it happened
> > > with their ancestors, why not in the hominid clade as well?
> > The niche would almost certainly have been already filled.
You must learn to distinguish speculations from reasoned
conclusions based on known data. The possibility that the
hominid clade derived directly from a purely arboreal LCA
must be regarded as remote.