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
Leaf-nosed lizard Leaf-nosed lizard Ceratophora tennentii, commonly known as the horned lizard, horn-nosed lizard, leaf-nosed lizard, and Tennent's leaf-nosed lizard, is a species of lizard in the family Agamidae. The species is endemic to Sri Lanka. The generic name, "Ceratophora", means horn bearer. The specific name, "tennentii", is in honour of Irish politician James Emerson Tennent, who was Colonial Secretary of Ceylon (1845–1850). "C. tennentii" has a leaf-like appendage on the end of its nose. The species can reach lengths of over including the tail. Males usually have more green in their coloration than females have, although they can change color to