Mexican beaded lizard generic name "Heloderma" means "studded skin", from the Ancient Greek words "hêlos" (ἧλος)—the head of a nail or stud—and "dérma" (δέρμα), meaning skin. Its specific name, "horrĭdum", is the Latin word meaning rough or rude. The four subspecies of beaded lizard, elevated to full species in 2013, are: Adult beaded lizards range from in length. They are substantially larger than the Gila monster, which only reaches lengths of . The snout-to-vent length of a beaded lizard averages . The average body mass of an adult beaded lizard is , about 45% heavier than the average mass of a gila monster,
Yellow-throated plated lizard Yellow-throated plated lizard The yellow-throated plated lizard or plated lizard ("Gerrhosaurus flavigularis") is a species of lizard, which is about 45½ cm (18 inches) in total length (including tail) and lives in the grassland and scrub of Sudan, Ethiopia and along Eastern Africa down to South Africa. A ground-living and burrowing lizard, this species is usually greenish-grey or brownish, with a yellow (or sometimes red) throat and often a narrow stripe down each side. It is well armored, with hard body plates, and head shields fused to the skull. The tail is generally about two-thirds of the total length. Its