re: origin of bats/reply to J. Headden

[David Peters <davidpeters@att.net>]

JH wrote:


<<Nothing in what you have shown in your email supports your previous position 
of a bipedal hypothesis. Could you care to elaborate on the paper's support or 
lack of refutation on the bipedal hypothesis, and what bipedal bats you have to 
argue your case? I can, as others have, cite several morphological features 
which make it difficult to evolve from bipedal locomotion[1]. Note that 
standing around on two legs does not result in any form of bipedal constraint 
on development, especially locomotorally.

[1] For example, the twisting of the entire hindlimb around its long axis, 
echolocation, cranial features adapted for three-dimensional auditory and 
visual senses which are absent in terrestrial quadrupeds OR bipeds, but are 
present in volant and arboreal animals, of which few are bipeds aside from 
birds (and they don't run around in trees).>>

  Cheers,

  Jaime A. Headden


Unfortunately, Jaime, you're thinking only of upright bipeds. All bats are 
inverted.

BTW sorry if I missed any posts that needed answers. I've only recently had the 
chance to see the list. 
I've been responding to emails that have cc'd me personally.


 David Peters

davidpeters@att.net