Mexican beaded lizard debate among scientists. However, this venom has been found to contain several enzymes useful for manufacturing drugs in the treatment of diabetes, and research on the pharmacological use of its venom is ongoing. Threatened throughout its range by overcollection and habitat loss, it is a CITES protected species. The Guatemalan beaded lizard ("H. charlesbogerti" ) is one of the rarest lizards in the world, with a wild population of fewer than 200. The beaded lizards have one close living relative, the Gila monster ("H. suspectum"), as well as many extinct relatives in the Helodermatidae, whose genetic history may be traced
Giant plated lizard Giant plated lizard The giant plated lizard ("Gerrhosaurus validus") is a lizard of the Gerrhosauridae family, which is found in dry to mesic habitats of southern Africa. They are wary and stay close to their rocky retreats. A large lizard with a flattened head and body, its length is a maximum of . The soles of the feet have black rubber-like balls, an adaptation to living on rock outcrops. It is called the plated lizard because of the platelike scales on the back. This lizard is very shy and hard to approach. When threatened, it will jam itself into rock