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
Granite night lizard Granite night lizard The granite night lizard ("Xantusia henshawi" ) is a species of xantusiid lizard endemic to North America. The specific name, "henshawi", is in honor of American naturalist Henry Wetherbee Henshaw. "X. henshawi" is found in Mexico in the Mexican state of Baja California, and also in the United States in adjacent southern California. "X. henshawi" is flat-bodied with a broad, flat head and a soft skin. It has rounded, dark dorsal spots on a pale yellow or cream background. Its scales are granular on its dorsum, but large and squarish on the ventral surface. These lizards have