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
Cuban night lizard Cuban night lizard The Cuban night lizard ("Cricosaura typica") is a night lizard (family Xantusiidae, subfamily Cricosaurinae) endemic to southern Cuba. It is the only member of the genus "Cricosaura", one of three in the night lizard family. "Cricosaura" is derived from the Greek words "krikos" and "saura" meaning "ring lizard", perhaps in reference to the rings of caudal scales. The name ""typica"", from the Greek word "typikos", means "typical". The Cuban night lizard differs from the other night lizards in possessing two frontonasal scales, one frontal scale, no parietal scale, and a fourth finger with four phalanges. With a