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Re: Question about hominids (from 'Ardi')



Right.
Did you see one drill (monkey) which appeared on the news and walked
bipedally because some stomach ache it suffered?


2009/10/12 T. Michael Keesey <keesey@gmail.com>:
> On Mon, Oct 12, 2009 at 9:06 AM, Augusto Haro <augustoharo@gmail.com> wrote:
>>
>> We can be unique in being a plantigrade
>> biped (for more steps than most other primates and bears) but I am not
>> sure about gibons.
>
> Sifakas are also plantigrade bipeds on the ground, but they jump
> rather than walk.
>
> Gibbons walk primarily bipedally on the ground. All apes are capable
> of this to some degree. For example, here's a strutting chimpanzee I
> saw at the L.A. zoo: http://www.flickr.com/photos/keesey/2902406586/
>
> I don't think extant non-human primates can lock their knees like us, though.
>
> "Ardi" is interesting because it hints that bipedalism may be
> primitive for the human-chimpanzee clade. Considering that gibbons are
> bipedal, this could extend to all of  Hominoidea; perhaps further.
>
> Oh, and: dinosaurs, dinosaurs, dinosaurs!!!
> --
> T. Michael Keesey
> Technical Consultant and Developer, Internet Technologies
> Glendale, California
> http://tmkeesey.net/
>