[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Dimorphic Dilophosaurs
Steve Brusatte wrote:
I was recently allerted of a paper discussing sexual dimorphism in
Dilophosaurus. Could anybody give me a ref, and, if possible, an abstract
or short summary (because I have a hard time finding many of these papers
in the middle of Illinois farm country).<
To which Jordan Mallon replied:
Might this have anything to do with the whole _D. wetherilli_/_D.
breedorum_ "controversy"? I understand many people consider them to be
Alow me to step in here. While HP Greg Paul suggests sexual dimorphism in
his excelent book, PDW, I must disagree. While I may by no means be a Ph.D.,
I do have some experience with this animal. In fact, a project that I
undertook was trying to compare potential sexual dimorphism in _Coelophysis
bauri_ and _Syntarsus rhodesiensis_ to _D. wetherilli_. I measured,
compared, looked at many actual specimens, ploted charts, ran ratios. And I
wrote a paper for my paleo class. My conclusion; all variation seen within
_D. wetherilli_ can be explained by individual variation and ontogeny. The
plot is a straight line, unlike what was found by Raath in _S.
rhodesiensis_. There is no evidence that I have seen that _D. wetherilli_
exhibits sexual dimorphism (though, I must say, I think it would be cool if
it did). So, there you have it. Although I may not usually have much to
contribute to some of the topics on this list, this is one thing that I do
have some knowledge about. If anyone wants a copy of my paper, by the way,
feel free to contact me, and I'll e-mail them a copy.
Student of Geology
Northern Arizona University
P.O. Box 20840
Flagstaff, Az. 86011
"A _Coelophysis_ with feathers?"
Get your FREE download of MSN Explorer at http://explorer.msn.com