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
Aran rock lizard Aran rock lizard The Aran rock lizard ("Iberolacerta aranica") is a species of lizard in the family Lacertidae. "I. aranica" is found in a small area of the central Pyrenees on the Spanish-French border. It lives only in Mauberme massif, including its foothills between the Val d'Aran in Spain and the Ariège in France. The natural habitats of "I. aranica" are temperate grassland, rocky areas, and pastureland. "I. aranica" is threatened by habitat loss. The Aran rock lizard is a medium-sized lizard. Males can reach a total length (including tail) of up to , females up to . The back