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Re: More Holtz on the origin of birds



In a message dated 95-12-07 12:10:26 EST, Thomas_R_HOLTZ@umail.umd.edu (th81)
writes:

>Among advanced coelurosaurs, there evolved a clade specializing in
>grapple-and-slash predation (as found today in big cats).  This clade
>retained the primitive features of long, grasping arms, furculae, unciates
>(maybe?).  This group was selected for reduced speed but increased agility,
>taking the tetanurine trend of a distally stiffened tail to an extreme and
>selecting for a reorganization of the pelvic girdle.
>
>One branch of this clade, composed of the smaller members, were scansorial
>predators.  This lineage includes Archaeopteryx.  The adaptations, already
>acquired for a particular form of predation, were exapted for flight.
>
>

Methinks the step from grapple-and-slash to flight was way too radical for
this scenario. Where do the feathers come in?