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RE: "Pachy's" had horns?



> From: Andy Farke [mailto:andyfarke@hotmail.com] 
>
> > Date: Thu, 9 Oct 2008 08:50:10 -0400
> > From: tholtz@umd.edu
>
> > Not with me it ain't. And Witmer clearly has evidence that 
> at least a 
> > rhino-type attachment was not present. I can't speak for others.
> 
> With all due respect to Dr. Witmer, most of the credit for 
> the work on horn attachment, etc., should go to Tobin 
> Hieronymus, one of Larry's students. 
> 
> See:
> Hieronymus, T.L., L.M. Witmer, and R. Ridgely (2006) The 
> structure of white rhinoceros (Ceratotherium simum) horn 
> investigated by X-ray computed tomography and histology, with 
> implications for growth and external form. Journal of 
> Morphology 267:1172-1176.
> PDF available at: 
> http://www.oucom.ohiou.edu/dbms-hieronymus/Hieronymus%20et%20a
l%202006%20Rhinoceros%20horn%20structure.pdf
> 
> And a related SVP abstract:
> 
> Hieronymus, T.L., L.M. Witmer, D. Tanke, and P.J. Currie. 
> (2006) Horn morphology of Pachyrhinosaurus and horn evolution 
> in centrosaurine dinosaurs. Journal of Vertebrate 
> Paleontology 26(3, suppl): 75A. 

No offense to Tobin: forgot that that paper had actually been published!

Thomas R. Holtz, Jr.
Email: tholtz@umd.edu   Phone: 301-405-4084
Office: Centreville 1216                        
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
http://www.geol.umd.edu/~tholtz/
Fax: 301-314-9661               

Faculty Director, Earth, Life & Time Program, College Park Scholars
http://www.geol.umd.edu/~jmerck/eltsite/
Fax: 301-405-0796

Mailing Address:        Thomas R. Holtz, Jr.
                        Department of Geology
                        Building 237, Room 1117
                        University of Maryland
                        College Park, MD 20742 USA