And why I came to the "conclusion" they are likely Gerrhosaurus major bottegoi - Plus I figured the site may help clear (or make worse ?) the seeming confusion between the types of plated lizards.

http://www.grisus-welt.de/Gerrhosauridae/Gerrhosaurus/Gerrhosaurus_major_bottegoi/gerrhosaurus_major_bottegoi.html

This page indicates that G. m. bottegoi is the western subspecies of G. m. major and is larger and more sturdy.

(any added/contrary information with photos/sources would be very appreciated)