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Re: The Potentials....
I always thought that pterodactyloids might make decent candidates for this sort
of speculation. A flightless pterosaur would have a relatively large brain,
plantigrade feet and ape-like posture. The bone supporting the propatagium might
be co-opted into an opposable digit - is it in fact homologous to our thumbs?
It might not be as satisfying as envisioning an intelligent _Troodon_, but the
thought of fuzzy, erect bipeds with robust pinkies does have its charm.
P.S.: Didn't someone recently mention the suggestion that primates evolved from
flightless bats? Is there a reference for that or is it more idle speculation?