Another Reference, Please?

["Jerry D. Harris" <LOKICORP@compuserve.com>]

Hi Again -

        Oops...should've put this inquiry in my other request posting... 
8-/

        I also recall discussion on this list about a Yixian Fm. occurrence
of _Psittacosaurus_ that had premaxillary teeth (and was thus more
primitive than other known species of _Psittacosaurus_).  However, the only
published reference I have (Xu, X. in _Vertebrata PalAsiatica_ from a few
years ago) doesn't mention the premax teeth.  Is there a published
reference for the toothed taxon that I missed?

        As always, thanks for any help!


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                     Jerry D. Harris
                 Fossil Preparation Lab
          New Mexico Museum of Natural History
                   1801 Mountain Rd NW
               Albuquerque  NM  87104-1375
                 Phone:  (505) 899-2809
                  Fax:  (505) 841-2866
               102354.2222@compuserve.com