Mexican beaded lizard beaded lizard under the Convention on International Trade in Endangered Species as an Appendix I animal, making it illegal to export the species. Mexican beaded lizard The Mexican beaded lizard ("Heloderma horridum") is a species of lizard in the family Helodermatidae, one of the two species of venomous beaded lizards found principally in Mexico and southern Guatemala. It and its congener (member of the same genus) the Gila monster ("Heloderma suspectum") are the only lizards known to have evolved an overt venom delivery system. The Mexican beaded lizard is larger than the Gila monster, with duller coloration, black with yellowish
Mexican horned lizard 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. Its range partially overlaps with that of "Phrynosoma braconnieri". The Mexican horned lizard is a terrestrial species found in arid scrub, high desert, and even