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
Isthmian alligator lizard Isthmian alligator lizard The isthmian alligator lizard ("Gerrhonotus rhombifer") is a species of lizard of the Anguidae family. "G. rhombifer" is found in both Costa Rica and Panama. Unlike many lizards near its habitat, individuals have lateral folds. They give birth to live young. "Gerrhonotus rhombifer" had not been seen for fifty years, prior to being rediscovered in 2000 near Golfito, and is one of the rarest species of lizard in Costa Rica. "G. rhombifer" is a broad-headed, long-bodied lizard, which is similar to "Diploglossus monotropis". An adult measures from in total length, with the tail making up approximately two-thirds