This large lizard was a member of the sister group to Iguanians the Macrocephalosauridae. Lizards of this sort are surprisingly rare as fossils, especially this complete. This specimen came from the collection of the late Frank Menser, a great guy and lover of reptiles.
Late Cretaceous (Campanian)
Khermeen Tsav Formation
Gobi Desert, Mongolia
121mm partial skull and skeleton on 155mm matrix.