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RE: OMEISAUR CLUBS, PACHYRHINOSAUR




-----Original Message-----
From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
David Marjanovic
Sent: Thursday, May 23, 2002 12:36 AM
To: The Dinosaur Mailing List
Subject: Re: OMEISAUR CLUBS, PACHYRHINOSAUR

----- Original Message -----
From: "Tracy L. Ford" <dino.hunter@cox.net>
Sent: Thursday, May 23, 2002 3:15 AM

> Pachyrhinosaurus, did not have a horn over the nose, none of the
ceratopians
> with boss's did. Just to make that clear for those who believe they did.

Why do you think so?
No specimen that has a boss, not just Pachyrhinosaurus, shows ANY evidence
of a horn. The Pipestone Creek specimens have both Concave and Convex
bosses. There are juveniles that have a rudimentary horn (or more properly,
a split ridge) and at least one specimen that has both a ridge and the
starting of a boss. It's a misinterpretation that ALL ceratopians had a
nasal horn. Zuniceratops lacks one all together and there may be some later
ones that also did.

Tracy L. Ford
P. O. Box 1171
Poway Ca  92074