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,
Giant plated lizard Giant plated lizard The giant plated lizard ("Gerrhosaurus validus") is a lizard of the Gerrhosauridae family, which is found in dry to mesic habitats of southern Africa. They are wary and stay close to their rocky retreats. A large lizard with a flattened head and body, its length is a maximum of . The soles of the feet have black rubber-like balls, an adaptation to living on rock outcrops. It is called the plated lizard because of the platelike scales on the back. This lizard is very shy and hard to approach. When threatened, it will jam itself into rock