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
Mexican horned lizard tropical dry forest. "Phrynosoma taurus" can also persist in traditional pastures. "Phrynosoma taurus" is viviparous like some horned lizards ("Phrynosoma hernandezi", "Phrynosoma orbiculare" and others). Mexican horned lizard The Mexican horned lizard ("Phrynosoma taurus") is a horned lizard species native to Mexico. Horned lizards are sometimes referred to as "horned toads" or "horny toads", although they are not toads. Compared to other members of the horned lizards (genus "Phrynosoma"), little is known about this species. It is known to live in the Sierra Madre del Sur, south and southeast of Mexico City, in the states of Guerrero and Puebla, Mexico.