ID Bonsai - Zelkova?
 

I saw this bonsai at the Sacramento Bonsai show April 4, 2004 in
Sacramento, California, USA.

http://richard2721.home.mindspring.com/zelkova.htm

It was labeled Zelkova. Can someone tell me if it is a Zelkova
serrata?
Also, are there any named varieties of this tree that would be more
suited for bonsai?
Thanks in advance.

Richard in Sacramento