Ken Kinman wrote:
Someone mentioned the twist-thumb synapomorphy. Is it a synapomorphy of Dinosauria or something more or less inclusive? Segnosaurs apparently lack it, so assume there are a lot of other dinosaurs that lack it as well.
The only "twist-thumb" I know of is a synapomorphy of the Prosauropoda.
Tim
_________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp