ornithischian classification (cool discussion)

["Ken Kinman" <kinman@hotmail.com>]

George,
     I assume you meant Pachycephalosauridae rather than Pisanosauride.
     So are you still suggesting that Pachycephalosauridae and 
Heterodontosauridae form a clade that is sister group to a 
Psittacosaurid-Protoceratopsid-Ceratopsid clade, rather than 
Heterodontosauridae as sister to all the other marginocephalians?
     If so, do you think Heterodontosauridae would be sister group to 
Pachycephalosauridae or paraphyletically giving rise to it?   Perhaps there 
is not enough information to determine this for sure?
             -------Cheers,   Ken
P.S.  I think I've probably doubled my understanding of ornithischian 
phylogeny in just one day (not that I knew that much before).  Fascinating 
discussion, and nice to get a break from theropods for a change.
*********************************************************
> From: Dinogeorge@aol.com
> Reply-To: Dinogeorge@aol.com
> To: dinosaur@usc.edu
> Subject: Re: preliminary ornithischian classification
> Date: Sat, 9 Jun 2001 20:56:08 EDT
>
> In a message dated 6/9/01 4:27:50 PM EST, amaris@tin.it writes:
>
> << Comment are welcome >>
>
> Nice job! I classified Heterodontosauridae and Pisanosauridae in
> Pachycephalosauria back in 1991 in Mesozoic Meanderings #2 first printing, 
> on
> the basis of rather fewer characters than you have.
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