Re: 18 Questions on Old and New Dinosaur Species

[Dinogeorge@aol.com]

In a message dated 96-01-03 14:34:22 EST, Thomas_R_HOLTZ@umail.umd.edu (th81)
writes:

>>10) Have  _Parasaurolophus_ skulls with short, drooping crests been found
>>together with _Parasaurolophus_ skulls with long, straighter crests?  In
>>other words, is _Parasaurolophus cyrtocristatus_ (spelling?) really the
>>female
>>_P. walkeri_?
>
>Good question.  That hypothesis has been put forward, and does make sense.
>The recent disovery of a new Parasaurolophus skull might help in this study.
>
>

The new skull resembles that of the holotype of _P. walkeri_ (and _P.
tubicen_). Bob Sullivan showed me some photos at the 1995 SVP.

The problem is geographic: _P. cyrtocristatus_ and _P. tubicen_ are from the
southwestern US, _P. walkeri_ is from Alberta. Maybe they're geographically
distinct species, or maybe _P._ just did a lot of walking.