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[Fwd: RE: dinontogeny]



 -------- Original-Nachricht --------
 Betreff:     RE: dinontogeny
 Datum:     Tue, 13 Oct 2009 22:15:23 -0700
 Von:     GUY LEAHY <xrciseguy@q.com>
An: Gregory Paul <gsp1954@aol.com>, Dinosaur Mailing List
<dinosaur@usc.edu>

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It was plain text, but somehow it was in MIME format nevertheless. From the source text:

 Way back in 1986=2C Tim Tokaryk published a short paper in Canadian
 Field N= aturalist

 (v 100=2C p. 192-196) where he noted that all specimens of
 _Triceratops_ fr= om Canada were _T. prorsus_.  By contrast=2C _T.
 horridus_ is much more com= mon in the U.S. where the two morphs
 co-occur.  If this possible geographic= separation is still true (any
 updates would be welcome)=2C it could be int= erpreted to suggest
 that _T. prorsus_ and _T. horridus_ were separate speci= es.

 =20

 Guy Leahy=20

I wonder if this, or the mentioned possibility of sexual dimorphism, brings us back to *Torosaurus latus* and *T. utahensis*. But I'd be surprised if that weren't mentioned in Scannella's upcoming paper.