[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: First Uncinant / Human Evolution / 1st Theriz.
John V Jackson wrote:
<Can't think of anything much to say about the new Theriz, except it's
a bit too big to fly itself. However, the wrist structure of
therizino..s is "obviously" ex-flying.>
Don't know what you mean by this.
All known therizinosaur/segnosaur wrists are more like those of
ornithomimids or prosauropods (albeit a little squashed
proximodistally), so tell us rather little, as both groups seem to be
good canidates for "closest to", as well as oviraptorosaurs.
<I am very worried by the idea of a backward pointing pubis evolving
pre-Archaeopteryx - which was exhibited in (certain?) late K
Certain, yes. *Segnosaurus*, for instance, one specimen with pelvis,
foot, some vertebrae and ribs I believe, and the jaw.
<If V11579 had a backward-pointing pubis, this would mean . . .
b-p.p's evolved twice in flying forms - once for theriz's, and once
for uncinants. And if V11579 flew, or had flying ancestors, it, they
and it's Jurassic descendents were very shy. OR - maybe
segnos/theriz..s, about which we know so little, were polyphyletic in
some way . . . or maybe V11579 isn't a segnosaur ? ? ?>
Next canidate is a prosauropod.
Jaime A. Headden
Qilong, the website, at:
All comments and criticisms are welcome!
DO YOU YAHOO!?
Get your free @yahoo.com address at http://mail.yahoo.com