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
Short-tailed horned lizard Mexican states of Puebla and Oaxaca. It may also inhabit Veracruz. Short-tailed horned lizard The short-tailed horned lizard ("Phrynosoma braconnieri" ) is an uncommon species of horned lizard endemic to Mexico. It has a very distinct, shortened tail, which is sometimes not apparent. The specific epithet, "braconnieri", is in honor of French naturalist Séraphin Braconnier. "P. braconnieri" has a very short tail relative to its body length, the shortest of the horned lizards, or indeed of any lizard, thus its common name. "P. braconnieri" inhabits pine-oak woodland and xeric thorn-scrub. It can also be found in corn fields or other