-----Original
Message-----
From: owner-dinosaur@usc.edu
[mailto:owner-dinosaur@usc.edu]On Behalf Of HPB1956@aol.com
Sent: Saturday, December 22, 2001
12:40 PM
To: dinosaur@usc.edu
Cc: HPB@bdal.de;
dino.hunter@home.com
Subject: Re: Scipionyx position
Tracy
L. Ford wrote on 12/21/2001:
>>
It is considered a basal coelurosaur because of the presence of the following
primitive features: prefrontal well-developed; lacrimal robust; acromion
present, rounded coracoid ;ischial distal expansion (ischial foot?); 4th
trocanter weakly developed ; unexpanded , thin v-shaped chevrons.
These are given in the
book.
<<
IIRC Scipionyx is regarded a juvenile. If true it may lack some derived
characters due to being juvenile. This in turn would automatically lead to a
basal position inside Coelurosauria in a cladistic analysis. BTW in the last
cladogram which Thomas Holtz presented to the DML Scipionyx was found to be the
most basal coelurosaur.
I think to solve this question we have to find a fossil which can be shown to
be the adult form of Scipionyx.
Cheers <<
Heinz Peter Bredow <<
Nope, not
me, I never wrote that. I believe I was responding to someone and you thought I
wrote it reply. Another case of being blamed for something I never did L
Tracy L. Ford
P. O. Box 1171
Poway Ca
92074