[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: A few more...

>From: Dinogeorge@aol.com
 > In a message dated 95-09-29 13:20:48 EDT, Thomas_R_HOLTZ@umail.umd.edu (th81)
 > writes:
 > >Much in the way that the hoatzin "magically regained" functional unguals?
 > >
 > >Reversals happen.
 > Birds never really "lost" functional unguals, since these are expressed in
 > most avian embryos. Hoatzin juveniles retain them until adulthood, when, as
 > in all good birds, they are subsumed into the wing.
Actually, given the limited knowledge we have of dinosaur embryos,
we cannot rule this out in the case of basal dinosaurs vs. sauropods.

I do not find the reversal required there to be all that impossible.

swf@elsegundoca.attgis.com              sarima@netcom.com

The peace of God be with you.