[Aztlan] Zapotec hieroglyph

[Kauffman, Greg Lee]

Hello,
I'm currently working on a project for a museum in which we're cataloging all of the Pre-Columbian artifacts for a web page that is in the process of being created.  Upon one of the pieces that was labeled Zapotec by the donor, is a hieroglyph.  I personally know nothing of the Zapotec writing system and I'm wondering if someone out there may know of a reading for the glyph that appears upon the breech cloth.  Any help would be greatly appreciated!
Thanks,
Greg 

here is the URL:
http://www.flickr.com/photos/39835212@N02/?saved=1