[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
STRANGE THEROPOD SKULLS
Regarding the bizarre skull of the Antarctic theropod
_Cryolophosaurus_, Tom Holtz writes..
> The skull of Cryolophosaurus is pretty puzzling as currently
> described, particularly the squamosal-postorbital-jugal contact
> (which, in all right-thinking theropods, do NOT form a single
> contact in the middle of the infratemporal fenestra!!).
Tom, what on Earth is a 'right-thinking theropod'? I am still utterly
confused by the cryolophosaur skull, and with such a poor,
preliminary description to go on (Hammer and Hickerson 1994), we are
all in the dark. Someone should get hold of the thing and
describe it properly - it looks (from photos, not the god-awful
diagrams provided by Hammer and Hickerson) very significant.
I still find it hard to believe that the jugal does project so far
dorsally as to suture with the squamosal and therefore divide the
laterotemporal fenestra into two - this is utterly unique if true.
Mind you, tyrannosaurs come pretty close but with a totally different
morphology (both the squamosal and quadratojugal rostrally invade the
lat. fen.), and Hu's diagram of _Dilophosaurus sinensis_ does too:
here, what appears to be the squamosal divides the lat. fen. and
apparently reaches the dorsal bar of the jugal. Does anyone have any
photos of the skull to see if this is for real?
> I think that Bakker et al.'s and Sereno's suggestion that
> Eustreptospondylus is closely related to Torvosaurus may have some
> merit based on current data. Unfortunately, both are less complete
> than one (okay, I) would like... :-(
There are many, many problems with all of the characters that both
teams used to support a _Eustreptospondylus_-_Torvosaurus_ link (you
want me to go through them?)... nevertheless, there are still a few
similarities that look very significant (e.g. loss of quadratojugal
foramen/fossa, tall quadratic shafts). I am _hoping_ to do a
thorough description of this dinosaur sometime in the future: god
knows someone has to.
"You know people talk about little green men? They ain't green"