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Re: Exaptation



In a message dated 95-12-07 21:03:26 EST, ornstn@inforamp.net (Ronald
Orenstein) writes:

>>Compare this to the wealth of herrerasaurians, ceratosaurians, carnosaurs,
>>dromaeosaurids, oviraptorosaurs, ornithomimosaurs, and so forth, which BCF
>>asserts branched off mainly before the advent of powered flight. Your
thesis
>>may be more correct than you think.
>
>Well, if they branched off before the advent of powered flight they can
>hardly be secondarily flightless, can they?

Gliding and canard-wing-controlled leaping are forms of flying. Just not as
well developed as powered flight. BCF never asserted that the earlier
theropods (or even most of the later ones, for that matter) descended from
_powered_ fliers!