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Re: Details on SVP 2001 Friday talks
Nick Longrich wrote:
> Well, Sinraptor dongi has an elongate flange
> reaching around so as to almost close the pubic
> fenestra; looking at the casts it
> makes it look likely that in life the thing was
> actually closed. Sinraptor (Yangchuanosaurus)
> hepingensis is illustrated with a closed
> pubic fenestra.
_Sinraptor_ (ZDM 0024) is a subadult and that region
may not have been fully ossified at the time of death.
The pubic apron is not fused into a single plate, so
that may be additional reason for doubt. To clear up
any confusion, do you mean the obturator foramen of
the pubis, or pubic fenestra?
<snip> characters- things like the
> overhanging postorbital boss, expanded
> prefrontal, lip-like edge to the ventral margin of
> the antorbital fenestra, mental foramina of the
> dentary set in a well-defined groove- which could
> tie them together.
The first character is seen in a variety of different
animals, though Sinraptorids take it a step further. I
believe that in the Currie and Carpenter description
of _Acrocanthosaurus_ they suggested it was a
size-dependant characteristic. I'm thinking that the
development of a pneumatic rugose supraorbital bar may
not be diagnostic within traditional Carnosauria.
Before I could comment on the other 2 characters
I'd need to know whether you consider
_Acrocanthosaurus_ a carcharodontosaurine, since it
> Regarding troodontids, Sinornithoides seems to
> have an extraordinarily narrow head- rather similar
> to that "bladelike" snout that Velociraptor has.
Is the ventrally bowed skull of _V_ diagnostic in any
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