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Re: Why did small dinos become extinct?
I was going to suggest an alternative theory for the presecnce of quill
knobs and their supported structures in non-volant dinosaurs in the
recent thread about this topic, but declined to do so. What if the quill
knobs did not support 'feathers,' but derived structures to aid in prey
----- Original Message ----- From: "Tim Williams"
To: <email@example.com>; <firstname.lastname@example.org>
Sent: Thursday, December 13, 2007 6:12 PM
Subject: RE: Why did small dinos become extinct?
(2) quill knobs, which were once thought to have been indicative of
flight (or at least flight ancestry) are now reported for
_Velociraptor_, suggesting (but not proving) that this character may
not have originally evolved for flight. <
Might quill knobs have evolved for carrying airloads generated for
directional control (same thing as evolving for flight....) ?