Well what do you know, that link you posted links to the little guy/gal that I really like at MARS....

So far I've found these few sites to be I guess the "best".
(not sure if they are correct in info or not)

http://www.anapsid.org/plated.html

http://www.unc.edu/~dtkirkpa/stuff/plated.html

http://www.honoluluzoo.org/great_plated_lizard.htm